{"id":58872,"date":"2023-05-22T15:05:47","date_gmt":"2023-05-22T15:05:47","guid":{"rendered":"https:\/\/naturpiedra.com\/es\/?page_id=58872"},"modified":"2023-06-06T08:29:54","modified_gmt":"2023-06-06T08:29:54","slug":"quarries-and-materials","status":"publish","type":"page","link":"https:\/\/naturpiedra.com\/es\/en\/quarries-and-materials\/","title":{"rendered":"Quarries and materials"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"58872\" class=\"elementor elementor-58872\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-d6da0f2 elementor-hidden-tablet elementor-hidden-mobile elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"d6da0f2\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-ba3e16c\" data-id=\"ba3e16c\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-eab02d0 elementor-widget__width-auto elementor-widget elementor-widget-button\" data-id=\"eab02d0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-xs\" href=\"https:\/\/naturpiedra.com\/es\/en\/geological-setting\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Geological setting<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5a73b01 elementor-widget__width-auto elementor-widget elementor-widget-button\" data-id=\"5a73b01\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-size-xs\" role=\"button\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Quarries and materials<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4e1d49f elementor-widget__width-auto elementor-widget elementor-widget-button\" data-id=\"4e1d49f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-xs\" href=\"https:\/\/naturpiedra.com\/es\/en\/regulatory-and-normative-aspects\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Regulatory and normative aspects<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-631d86e elementor-widget__width-auto elementor-widget elementor-widget-button\" data-id=\"631d86e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-xs\" href=\"https:\/\/naturpiedra.com\/es\/en\/sustainability-and-energy-efficiency\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Sustainability and energy efficiency<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-20fb721 elementor-widget__width-auto elementor-widget elementor-widget-button\" data-id=\"20fb721\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-xs\" href=\"https:\/\/naturpiedra.com\/es\/en\/comercial-products\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Comercial products<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-74eb266 elementor-widget__width-auto elementor-widget elementor-widget-button\" data-id=\"74eb266\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-xs\" href=\"https:\/\/naturpiedra.com\/es\/en\/products-subject-to-standardised-european-norms\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Products subject to standardised European norms<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6780da6 elementor-widget__width-auto elementor-widget elementor-widget-button\" data-id=\"6780da6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-xs\" href=\"https:\/\/naturpiedra.com\/es\/en\/specifications-for-pieces-for-construction-works\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Specifications for pieces for construction works<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-704b90c elementor-widget__width-auto elementor-widget elementor-widget-button\" data-id=\"704b90c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-xs\" href=\"https:\/\/naturpiedra.com\/es\/en\/annex-laboratory-test-protocols\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Annex. Laboratory test protocols<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-99a316d elementor-section-full_width elementor-section-stretched elementor-hidden-desktop elementor-section-height-default elementor-section-height-default\" data-id=\"99a316d\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;stretch_section&quot;:&quot;section-stretched&quot;,&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-8951774\" data-id=\"8951774\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-578f808 elementor-nav-menu__align-justify elementor-nav-menu--dropdown-none elementor-widget elementor-widget-nav-menu\" data-id=\"578f808\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;layout&quot;:&quot;horizontal&quot;,&quot;submenu_icon&quot;:{&quot;value&quot;:&quot;&lt;i class=\\&quot;fas fa-caret-down\\&quot; aria-hidden=\\&quot;true\\&quot;&gt;&lt;\\\/i&gt;&quot;,&quot;library&quot;:&quot;fa-solid&quot;}}\" data-widget_type=\"nav-menu.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<nav aria-label=\"Men\u00fa\" class=\"elementor-nav-menu--main elementor-nav-menu__container elementor-nav-menu--layout-horizontal e--pointer-none\">\n\t\t\t\t<ul id=\"menu-1-578f808\" class=\"elementor-nav-menu\"><li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-61795\"><a href=\"https:\/\/naturpiedra.com\/es\/en\/geological-setting\/\" class=\"elementor-item\">Geological setting<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-61796\"><a href=\"https:\/\/naturpiedra.com\/es\/en\/quarries-and-materials\/\" class=\"elementor-item\">Quarries and materials<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-61797\"><a href=\"https:\/\/naturpiedra.com\/es\/en\/regulatory-and-normative-aspects\/\" class=\"elementor-item\">Regulatory and normative aspects<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-61798\"><a href=\"https:\/\/naturpiedra.com\/es\/en\/sustainability-and-energy-efficiency\/\" class=\"elementor-item\">Sustainability and energy efficiency<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-61799\"><a href=\"https:\/\/naturpiedra.com\/es\/en\/comercial-products\/\" class=\"elementor-item\">Comercial products<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-61800\"><a href=\"https:\/\/naturpiedra.com\/es\/en\/products-subject-to-standardised-european-norms\/\" class=\"elementor-item\">Products subject to standardised European norms<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-61801\"><a href=\"https:\/\/naturpiedra.com\/es\/en\/specifications-for-pieces-for-construction-works\/\" class=\"elementor-item\">Specifications for pieces for construction works<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-61802\"><a href=\"https:\/\/naturpiedra.com\/es\/en\/annex-laboratory-test-protocols\/\" class=\"elementor-item\">Annex. Laboratory test protocols<\/a><\/li>\n<\/ul>\t\t\t<\/nav>\n\t\t\t\t\t\t<nav class=\"elementor-nav-menu--dropdown elementor-nav-menu__container\" aria-hidden=\"true\">\n\t\t\t\t<ul id=\"menu-2-578f808\" class=\"elementor-nav-menu\"><li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-61795\"><a href=\"https:\/\/naturpiedra.com\/es\/en\/geological-setting\/\" class=\"elementor-item\" tabindex=\"-1\">Geological setting<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-61796\"><a href=\"https:\/\/naturpiedra.com\/es\/en\/quarries-and-materials\/\" class=\"elementor-item\" tabindex=\"-1\">Quarries and materials<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-61797\"><a href=\"https:\/\/naturpiedra.com\/es\/en\/regulatory-and-normative-aspects\/\" class=\"elementor-item\" tabindex=\"-1\">Regulatory and normative aspects<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-61798\"><a href=\"https:\/\/naturpiedra.com\/es\/en\/sustainability-and-energy-efficiency\/\" class=\"elementor-item\" tabindex=\"-1\">Sustainability and energy efficiency<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-61799\"><a href=\"https:\/\/naturpiedra.com\/es\/en\/comercial-products\/\" class=\"elementor-item\" tabindex=\"-1\">Comercial products<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-61800\"><a href=\"https:\/\/naturpiedra.com\/es\/en\/products-subject-to-standardised-european-norms\/\" class=\"elementor-item\" tabindex=\"-1\">Products subject to standardised European norms<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-61801\"><a href=\"https:\/\/naturpiedra.com\/es\/en\/specifications-for-pieces-for-construction-works\/\" class=\"elementor-item\" tabindex=\"-1\">Specifications for pieces for construction works<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-61802\"><a href=\"https:\/\/naturpiedra.com\/es\/en\/annex-laboratory-test-protocols\/\" class=\"elementor-item\" tabindex=\"-1\">Annex. Laboratory test protocols<\/a><\/li>\n<\/ul>\t\t\t<\/nav>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-b7a3b55 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"b7a3b55\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-732d2ea\" data-id=\"732d2ea\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-c498f94 elementor-widget elementor-widget-text-editor\" data-id=\"c498f94\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h1 style=\"color: #54595f; font-size: 14px;\"><strong>Technical Data<\/strong> &gt; <em>Technical data Bernardos phyllite &gt; Quarries and materials<\/em><\/h1>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-400baff elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"400baff\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-1b304b1\" data-id=\"1b304b1\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-77f2da5 elementor-widget elementor-widget-text-editor\" data-id=\"77f2da5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p align=\"justify\">Some kilometres away from the town of Bernardos in the province of Segovia, one can find two slate quarries belonging to the company Naturpiedra Jbernardos, which exploits, prepares, controls and sells the rock extracted from those historical deposits.<\/p><p align=\"justify\">The company possesses numerous installations in the town, well-functioning machinery and a very experienced personnel, in order to be able to meet the exigencies in terms of quality and sustainability which are nowadays required for rock materials in the international market (Picture II-4).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-cb451d1 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"cb451d1\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-4cb38c3\" data-id=\"4cb38c3\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-c4688e8 elementor-widget elementor-widget-image\" data-id=\"c4688e8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1500\" height=\"889\" src=\"https:\/\/naturpiedra.com\/es\/wp-content\/uploads\/2023\/01\/Las-Canteras-y-los-Materiales-Naturpiedra-1.jpg\" class=\"attachment-full size-full wp-image-41221\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Picture II-4. Facilities and machinery for stone elaboration<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-c392ce9 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c392ce9\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-d9b33be\" data-id=\"d9b33be\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-fee463c elementor-widget elementor-widget-text-editor\" data-id=\"fee463c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p align=\"justify\">All these circumstances imply the need to count on the highest qualifications from the most demanding markets, established on the basis of laboratory trials as follows:<\/p><p align=\"justify\"><strong>According to European standards, based on UNE-European Norm standards.<\/strong><\/p><p align=\"justify\">The Bernardos slate complies with the highest standards of quality, based on the applicable regulations defined by the classification codes W1, T1, S1 and A1, which are described as follows:<br \/><br \/>\u2022 W1: very limited water absorption (&lt; 0,6), indicating an excellent resistance to frost and very low sensitivity to degradation<br \/>\u2022 T1: no oxidation or changes in structural appearance when testing over the thermal cycle<br \/>\u2022 S1: no structural alternations or changes in colour when exposed to Sulphur dioxide (SO2)<br \/>\u2022 A1: reaction to being exposed to fire, considered as compliant<\/p><p align=\"justify\"><strong>According to the ASTM \u2013 American norm<\/strong><\/p><p align=\"justify\">Bernardos slate complies with the highest possible quality level as an S1 grade according to the ASTM-C406. This norm is the standard approved test report for roofing slates. It contains 3 different types of tests as follow:<\/p><p align=\"justify\">Test ASTM &#8211; C121 calculate the Water Absorption. Slate is considered as an S1 if the m\u00e1ximum does not exceed 0.25% \u2013 Bernardos slate have passed with 0.091%.<\/p><p align=\"justify\">Test ASTM &#8211; C120 calculate the Flexure (Breaking Load). Slate is considered as an S1 if the resistence is over 575 lbs \u2013 Bernardos slate have passed with 991 lbs.<\/p><p align=\"justify\">Test ASTM &#8211; C217 calculate the Weather Resistance (Depth of Softening). Slate is considered as an S1 if the m\u00e1ximum does not exceed<\/p><p align=\"justify\">0.02 in \u2013 Bernardos slate have passed with 0.0002 in.<\/p><p align=\"justify\">In relation to the American Norm ASTM C406 criterias, Bernardos slate have passed the highest level of quality which gives a life expenctancy of over 75 years.<\/p><p align=\"justify\">For a better understanding of the ASTM C-406 norm, it is important to understand that the classification is S1, S2 or S3, being S1 the highest grade. Slates approved as an S1 will be guaranteed to have a lifespan of 75 years and over, as an S2 it will be between 40 and 75 years and as an S3 it will be between 20 and 40 years.<\/p><p align=\"justify\">Thanks to the combination of an exceptional natural product and the experience and professionalism of the team at Naturpiedra Jbernardos, more than 80% of the production is exported, and can then be found in more than 25 countries across all five continents.<\/p><p>\u00a0<\/p><h2 id=\"1\" class=\"tagline\">THE BERNARDOS QUARRIES<\/h2><p align=\"justify\">In Bernardos, in addition to the currently active quarries, one can find numerous remains of previous exploitations scattered across the flanks of the Eresma river, which serve as proof of the continuity of the mining activities starting in mid17th century.<\/p><p align=\"justify\">Among these, it is worth highlighting \u2212 because it shows a notable degree of organisation \u2212 the exploitation founded in the early 20th century by the British company The Bernardos Slate Quarries Ltd, constituted in London in 1909 (see Part I), which demonstrates that Bernardos slate already held a level of international recognition at that time.<\/p><p align=\"justify\">Naturpiedra Jbernardos currently owns many quarries in the area containing various types of materials, two of which are used for the extraction of phyllite, and are officially registered under the following names:<\/p><p align=\"justify\">\u2022 Cantera El Castillo<br \/>\u2022 Cantera Engorduro<\/p><p align=\"justify\">The quarry of El Castillo (Cantera el Castillo) contains pieces of ground and amounting to a total area of 10 hectares. A recent geological study confirmed that there are reserves of 500,000 tons of phyllite of prime quality which can be used for roofing.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-fdffe93 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"fdffe93\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-c4f0e6e\" data-id=\"c4f0e6e\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4ad41ee elementor-widget elementor-widget-image\" data-id=\"4ad41ee\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1500\" height=\"500\" src=\"https:\/\/naturpiedra.com\/es\/wp-content\/uploads\/2023\/01\/cantera-bernardos-naturpiedra.jpg\" class=\"attachment-full size-full wp-image-41125\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Picture II-5. Cantera El Castillo.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-5146248 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"5146248\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-73df8cc\" data-id=\"73df8cc\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-bb1d053 elementor-widget elementor-widget-text-editor\" data-id=\"bb1d053\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p align=\"justify\">The quarry of Engorduro (Cantera Engorduro) is one of the oldest exploitations in Segovia, and, taking into account the mining sites, the debris facility and the manufacturing plant, can boast an available area of more than 90 hectares. The confirmed reserves exceed 2,000,000 tons.<\/p><p align=\"justify\">NOTE.- These figures could be multiplied by 10 if one includes the potential reserves contained in the slaty massif of Bernardos.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6be9f92 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6be9f92\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-58151a0\" data-id=\"58151a0\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f825939 elementor-widget elementor-widget-image\" data-id=\"f825939\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1500\" height=\"766\" src=\"https:\/\/naturpiedra.com\/es\/wp-content\/uploads\/2023\/01\/Las-Canteras-y-los-Materiales-2-Naturpiedra-1.jpg\" class=\"attachment-full size-full wp-image-41225\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Picture II-6. Cantera Engorduro<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-85275b8 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"85275b8\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-004b105\" data-id=\"004b105\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1dfd8b3 elementor-widget elementor-widget-text-editor\" data-id=\"1dfd8b3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2 id=\"paso2\" class=\"tagline\" style=\"font-size: 24px; font-weight: 600; color: #333333; text-transform: uppercase;\">HISTORICAL VALUE AS AN INSTRUMENT FOR RESTORATION<\/h2><p align=\"justify\">If one had to highlight a relevant property of the Bernardos slate, in addition of its purely technological properties, it is undoubtedly worth noting the slate\u2019s full adaptation to historical edification, as an appropriate material for restoration works.<\/p><p align=\"justify\">Indeed, the historical background presented in Part I of this publication mentions numerous and symbolic references to this slate, dating back to the 16th century, when it was chosen by King Phillip II for the construction of the roof in various royal works. This started with the Palace of Valsa\u00edn and the activity continued throughout the 17th century until it culminated in its most emblematic construction \u2212 the Monastery of San Lorenzo del Escorial.<\/p><p align=\"justify\">The quality, resistance and aesthetic value of the materials prompted the Crown to proclaim the Bernardos sites as Royal Quarries, which encouraged the use of this slate in numerous edifications.<\/p><p align=\"justify\">In addition, the historical relevance is complemented by the recommendations of great experts from international entities in charge of the conservation of the world\u2019s historical and cultural heritage. In this context, two important documents must be mentioned: the Athens Charter of 1933 and the Venice Charter of 1964, which was later elaborated on the guidelines of the former.<\/p><p align=\"justify\">The Athens Charter is the first document to formulate recommendations and general principles for the conservation of historical and artistic monuments. It was drawn up by a group of experts through the International Congress of Intellectual Cooperation and under the auspices of the League of Nations.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-675acfe elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"675acfe\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-6d547f0\" data-id=\"6d547f0\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-0221cc1 elementor-widget__width-auto elementor-widget elementor-widget-image\" data-id=\"0221cc1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"960\" height=\"333\" src=\"https:\/\/naturpiedra.com\/es\/wp-content\/uploads\/2023\/01\/Las-Canteras-y-los-Materiales-3-Naturpiedra.jpg\" class=\"attachment-full size-full wp-image-39936\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Picture II-7. Carta de Atenas.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-a61793f elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"a61793f\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-c3c63c6\" data-id=\"c3c63c6\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-0fad60d elementor-widget elementor-widget-text-editor\" data-id=\"0fad60d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p align=\"justify\">The principles for the conservation of monuments established by the Charter \u2212 such as the need to respect the historical and artistic works of the past without belittling the style of any epoch, or to ensure that the new materials used are recognisable \u2212 are still relevant today, and have served as the basis for subsequent documents which have come to expand the scope of recommendations.<\/p><p align=\"justify\">The Venice Charter was drawn up in 1964 within the framework of the International Council on Monuments and Sites (ICOMOS) created following a proposal put forward by UNESCO. The text of the ICOMOS conference contains a series of articles, some of which relate to restoration and read as follows:<\/p><p align=\"justify\">ART 1. The concept of a historic monument embraces not only the single architectural work but also the urban or rural setting in which is found the evidence of a particular civilization, a significant development or a historic event. This applies not only to great works of art but also to more modest works of the past which have acquired cultural significance with the passage of time.<\/p><p align=\"justify\">ART 2. The conservation and restoration of monuments must have recourse to all the sciences and techniques which can contribute to the study and safeguarding of the architectural heritage.<\/p><p align=\"justify\">ART 3. The intention in conserving and restoring monuments is to safeguard them no less as works of art than as historical evidence.<\/p><p align=\"justify\">ART 7. A monument is inseparable from the history to which it bears witness and from the setting in which it occurs. The moving of all or part of a monument cannot be allowed except where the safeguarding of that monument demands it or where it is justified by national or international interest of paramount importance.<\/p><p align=\"justify\">ART 9. The process of restoration is a highly specialized operation. Its aim is to preserve and reveal the aesthetic and historic value of the monument and is based on respect for original material and authentic documents. [&#8230;]<\/p><p align=\"justify\">ART 16. In all works of preservation, restoration or excavation, there should always be precise documentation in the form of analytical and critical reports [&#8230;]. This record should be placed in the archives of a public institution and made available to research workers. [&#8230;]<\/p><p align=\"justify\">In this context, the Bernardos slate is a product which can be clearly identified from its origins, has been used for almost 500 years and has been an essential part of many emblematic constructions of the Spanish architectural heritage. It is therefore crucial to protect it in order to continue with restoration works, in accordance with the recommendations which have been voiced in this respect at the international level.<\/p><p align=\"justify\">A good illustration of the importance of the Bernardos slate as historical material lies in the wide-ranging and well-documented construction works mentioned in Part I, covering the period from the mid-16th century until the beginning of the 19th century.<\/p><h2 align=\"justify\">TECHNOLOGICAL PROPERTIES OF THE SLATE<\/h2><p align=\"justify\">The properties of the Bernardos slate are to be understood in the context of their intended use as construction material, in accordance with the regulating framework developed by European committees on standardisation.<\/p><p align=\"justify\">Following this criterion, the characterisation tests can be divided into two groups.<\/p><p align=\"justify\">It must be noted that the herein mentioned results are those which were considered as most representative among the samples used for the tests. Throughout the years, Naturpiedra Jbernardos has been requesting different laboratories at national and international level to carry out the following tests:<\/p><p>\u00a0<\/p><h3 id=\"4\" class=\"tagline\">Characterisation tests for the slate used for roofing, following UNE EN 12326- 2, defined in the Sub-committee CEN TC128\/SC8<\/h3><p align=\"justify\"><u>Petrographic analysis<\/u><\/p><p align=\"justify\">\u2022 Macroscopic description<\/p><p align=\"justify\">Colour: Medium grey, N5 \u2212 following Rock Color Chart, Munsell (2009).<\/p><p align=\"justify\">Rock with high schistosity and very fine grain. The sample is compact and tends to separate along sub-parallel planes under pressure. There is no indication of agitation when the rock is subjected to hydrochloric acid diluted into 10%. The abundance of micaceous minerals gives the material a distinctive glassy look and, when the sample is slightly tilted, strips perpendicular to the schistosity become apparent.<\/p><p align=\"justify\">Two slabs of slate were sampled:<\/p><p align=\"justify\">&#8211; In a plane perpendicular to the exposed side and parallel to the longitudinal direction.<\/p><p align=\"justify\">&#8211; In a plane perpendicular to the exposed side and perpendicular to the longitudinal direction.<\/p><p align=\"justify\">\u2022 Microscopic study<\/p><p align=\"justify\">Mineral composition:<\/p><p align=\"justify\">&#8211; Main components: quartz, sericitic-argillaceous minerals (sericite-glauconite), muscovite, opaque.<\/p><p align=\"justify\">&#8211; Accessory components: biotite, tourmaline.<\/p><p align=\"justify\">Texture: Similar to siltstone with sporadic meta-psammite strips the size of very fine-grained sand.<\/p><p align=\"justify\"><u>Observations:<\/u><\/p><p align=\"justify\">Rock with low-grade regional metamorphism, within the facies of green schists. The biotite presence accounts for the metamorphism.<\/p><p align=\"justify\">The sample contains an abundance of subrounded quartz (with a level of roundness comprised between 0.3 and 0.5) and the crystals have their main axis oriented in the same direction as the main schistosity S1.<\/p><p align=\"justify\">The quartz is irregularly distributed across the slab, frequently with undulatory extinction, a clear indication that deformation processes have occurred.<\/p><p align=\"justify\">The size of grains are comprised between the grain-size fraction of silt and very fine-grained sand, the typical range for phyllite.<\/p><p align=\"justify\">The most abundant components of the sample are microliths of sericitic-argillaceous minerals, with a subparallel orientation and defining the main schistosity S1. This is most likely to be sericite-glauconite.<\/p><p align=\"justify\">The rest of the composition is made up of dispersed opaque granular compounds, probably iron oxides or hydroxides, which can form short veinlets, and, in very small quantities, biotite with low-grade crystallinity and possible traces of tourmaline (difficult to ascertain due to its small size).<\/p><p align=\"justify\">The rock is seemingly derived from very fine sediments the size of silt and with a quartz-argillaceous composition, which helps preserve a certain degree of stratification due to small variations in the depositional conditions and which lead to some accumulation of quartz.<\/p><p align=\"justify\">Given the grain size and the level of metamorphism, the rock is halfway between slate and schist, and can be described as phyllite. This term is still in commercial use for decorative rocks.<\/p><p align=\"justify\">However, according to current petrographic classification criteria for metamorphic rocks (British Geological Survey report 1999 number RR 99-02 Classification of metamorphic rocks, Chapter 9.5 &#8211; Slate and Phyllite), it is advised not to use this term since it encompasses meta-sedimentary rocks (as it is the case here) as well as rocks with dynamic metamorphism such as phyllite-mylonite. It is hence usually preferred to use a term referring to the type of sediments from which it is derived, the rock thus being classified as meta-siltstone.<\/p><p align=\"justify\">Such classification criterion also suggests that the adjective phyllitic must be added when describing rocks which have the distinctive glassy look and in which the argillaceous microliths can be seen through an optical microscope (criteria used to distinguish phyllites).<\/p><p align=\"justify\"><u>Proportion of minerals and average grain size:<\/u><\/p><p align=\"justify\">Mineral content (in %)Particle diameter (in mm)<\/p><p align=\"justify\">Quartz 37 % Between 0.015 and 0.12 mm<\/p><p align=\"justify\">Argillaceous minerals 58 % 0.01 mm<\/p><p align=\"justify\">Opaques 5 % Between 0.03 and 0.08 mm<\/p><p align=\"justify\">Structural type: longitudinal (O) transversal (f)<\/p><p align=\"justify\">Level of accumulation of mica: longitudinal: 65, transversal: 69<\/p><p align=\"justify\">CLASSIFICATION: Phyllite (Phyllitic meta-siltstone)<\/p><p align=\"justify\"><u>Determining the modulus of rupture and the typical modulus of rupture.<\/u><\/p><p align=\"justify\">Average modulus of rupture<\/p><p align=\"justify\">&#8211; Longitudinal direction: 55 N\/mm2<\/p><p align=\"justify\">&#8211; Transversal direction: 27 N\/mm2<\/p><p align=\"justify\">Typical modulus of rupture<\/p><p align=\"justify\">&#8211; Longitudinal direction: 41 N\/mm2<\/p><p align=\"justify\">&#8211; Transversal direction: 21 N\/mm2<\/p><p align=\"justify\">Orientation of the maximum modulus of rupture: LONGITUDINAL.<\/p><p align=\"justify\">Water absorption.<\/p><p align=\"justify\">Average value: 0.2 %<\/p><p align=\"justify\">Classification code: A1 (frost resistance).<\/p><p align=\"justify\">Frost resistance.<\/p><p align=\"justify\">Not necessary since it is a A1-type slate in terms of absorption.<\/p><p align=\"justify\">Determining the content of calcium carbonate and non-carbonate carbon through thermal catalytic decomposition.<\/p><p align=\"justify\">Calcium carbonate content (Cc): 0.2 % (&lt;5%, does not require an increase in thickness).<\/p><p align=\"justify\">Non-carbonate carbon content (Cnc): 0.08 % (&lt;2%, in accordance with the norm).<\/p><p align=\"justify\">Exposition to sulphur dioxide (SO2)<\/p><p align=\"justify\">Alterations: none, and no changes in colour<\/p><p align=\"justify\">Test results code: S1 (resistant to atmospheric SO2, does not require an increase in thickness).<\/p><p align=\"justify\">Thermal cycle test.<\/p><p align=\"justify\">Alterations: no oxidation, and no significant changes in appearance.<\/p><p align=\"justify\">Test results code: T1 (good behaviour upon thermal changes)<\/p><p align=\"justify\">Termal change resistance.<\/p><p>\u00a0<\/p><h3 id=\"5\" class=\"tagline\">Characterisation tests for the slate for other uses such as paving, tiling and masonry, etc, following the procedures developed by the Committee regulations CEN TC 246\/WG2 and CEN TC 125.<\/h3><p align=\"justify\"><strong>Petrographic study<\/strong>. See previous petrographic study. Picture II-8<\/p><p align=\"justify\">Petrographic classification (based on UNE-EN 12670:2003): PHYLLITE<\/p><p align=\"justify\"><strong>Water absorption with respect to atmospheric pressure (UNE EN 13755)<\/strong><br \/>Average value: 0.1 %<\/p><p align=\"justify\"><strong>Bending strength (UNE EN 12372)<\/strong><br \/>Average value: 65 N\/mm2<br \/>Expected lower value: 60 N\/mm2<\/p><p align=\"justify\"><strong>Resistance to freezing (UNE EN 12371)<\/strong><br \/>Bending strength after 144 cycles of frosting\/ defrosting<br \/>Average value: 65 N\/mm2<br \/>Expected lower value: 63 N\/mm2 Alterations: none<\/p><p align=\"justify\"><strong>Apparent density and open porosity (UNE EN 1936)<\/strong><br \/>Average value of apparent density: 2750 kg\/m3<br \/>Average value of open porosity: 0.3 %<\/p><p align=\"justify\"><strong>Breaking load for fixings (UNE EN 13364)<\/strong><br \/>Average value of breaking load: 3550 \u00b1600 N<br \/>Expected lower value: 2700 N<\/p><p align=\"justify\"><strong>Resistance to slipping (UNE EN 12633)<\/strong><br \/>Table of results<\/p><p align=\"justify\"><img loading=\"lazy\" decoding=\"async\" class=\"img-resp\" src=\"https:\/\/naturpiedra.com\/en\/assets\/img\/Picture-II-8-a.jpg\" alt=\"Table of results\" width=\"893\" height=\"157\" \/><br \/>Table of results<\/p><p align=\"justify\"><strong>Resistance to age through thermal shocks (UNE EN 14066)<\/strong><br \/>Mass variation: 0.03% \u2212 Irrelevant<br \/>Average value of variation of the modulus of dynamic elasticity: -0.3% \u2212 Irrelevant<\/p><p align=\"justify\"><strong>Resistance to fixings (UNE EN 13364): 3550 N<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-2025b54 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"2025b54\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-2b23b30\" data-id=\"2b23b30\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-da9c01a elementor-widget__width-auto elementor-widget elementor-widget-image\" data-id=\"da9c01a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"907\" height=\"1040\" src=\"https:\/\/naturpiedra.com\/es\/wp-content\/uploads\/2023\/01\/Las-Canteras-y-los-Materiales-4-Naturpiedra.jpg\" class=\"attachment-full size-full wp-image-39937\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Picture II-8. 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Laboratory test protocols Technical Data &gt; Technical data Bernardos phyllite &gt; Quarries and materials Some kilometres away from the town of Bernardos in the province of Segovia, [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"open","template":"","meta":{"inline_featured_image":false,"footnotes":""},"class_list":["post-58872","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Quarries and materials - naturpiedra JBERNARDOS<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/naturpiedra.com\/es\/en\/quarries-and-materials\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Quarries and materials - naturpiedra JBERNARDOS\" \/>\n<meta property=\"og:description\" content=\"Geological setting Quarries and materials Regulatory and normative aspects Sustainability and energy efficiency Comercial products Products subject to standardised European norms Specifications for pieces for construction works Annex. 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