{"id":2222,"date":"2025-06-09T08:54:21","date_gmt":"2025-06-09T12:54:21","guid":{"rendered":"https:\/\/lesgoudronsduquebec.webloft.cloud\/pyrite-in-concrete\/"},"modified":"2026-02-01T10:44:02","modified_gmt":"2026-02-01T15:44:02","slug":"pyrite-concrete","status":"publish","type":"page","link":"https:\/\/lesgoudronsduquebec.webloft.cloud\/en\/pyrite-concrete\/","title":{"rendered":"Problem \u2013 Pyrite in concrete"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"2222\" class=\"elementor elementor-2222 elementor-1650\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6784533 e-flex e-con-boxed e-con e-parent\" data-id=\"6784533\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-23a16fe e-con-full e-flex e-con e-child\" data-id=\"23a16fe\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9d9177b elementor-widget elementor-widget-heading\" data-id=\"9d9177b\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Pyrite in concrete<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5341c91 e-flex e-con-boxed e-con e-parent\" data-id=\"5341c91\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-ccc1d45 e-con-full e-flex e-con e-child\" data-id=\"ccc1d45\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0e38ac0 elementor-widget elementor-widget-text-editor\" data-id=\"0e38ac0\" data-element_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 data-start=\"80\" data-end=\"426\">Pyrite is a sulfurous mineral found in small quantities in limestone or clay stones used for crushed stone fill. In the presence of both water and oxygen, pyrite oxidizes and produces sulfuric acid. The sulfuric acid then reacts with the calcium carbonates contained in the crushed stone as well as with the cementitious products in the concrete.<\/p><h3 data-start=\"80\" data-end=\"426\">Sulfatation<\/h3><p data-start=\"428\" data-end=\"696\">This chemical reaction, known as sulfatation, produces gypsum, whose crystallization causes the crushed stone to swell. When the sulfuric acid comes into contact with the underside of the concrete slab, the concrete swells due to sulfatation and begins to deteriorate.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-bef6a76 e-con-full e-flex e-con e-child\" data-id=\"bef6a76\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-77014f8 elementor-widget elementor-widget-text-editor\" data-id=\"77014f8\" data-element_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<h3>Pyrite-contaminated backfill<\/h3><p data-start=\"49\" data-end=\"295\">The swelling of the backfill beneath concrete slabs causes the slabs to lift, as well as the interior partitions supported by them. This uplift can cause damage to floors, walls, and even the ceilings of the floors located above the partitions.<\/p><p data-start=\"297\" data-end=\"550\">The thicker the backfill, the greater the swelling. This is why this problem is more common in residential garages, where the backfill often reaches 1 meter in thickness, whereas under basement slabs it generally only ranges from 10 to 20 centimeters.<\/p>\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-1e84403 elementor-widget elementor-widget-button\" data-id=\"1e84403\" data-element_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-sm\" href=\"https:\/\/lesgoudronsduquebec.webloft.cloud\/en\/quote\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-icon\">\n\t\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 30.2 51.4\"><g><g id=\"Calque_2\"><g id=\"Calque_1-2\"><path d=\"M4.3,50.8l-3.7-3.6c-.8-.8-.8-2,0-2.8l18.1-18.7L.6,7c-.8-.8-.8-2.1,0-2.8L4.3.6c.8-.8,2.1-.8,2.8,0l22.2,23c1.1,1.2,1.1,3,0,4.2L7.1,50.8c-.8.8-2,.8-2.8,0\"><\/path><\/g><\/g><\/g><\/svg>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">FREE QUOTATION<br> <\/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>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-a4da7ba e-flex e-con-boxed e-con e-parent\" data-id=\"a4da7ba\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-00a40fc elementor-widget__width-auto elementor-widget elementor-widget-heading\" data-id=\"00a40fc\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">THE GOUDRONS DU QU\u00c9BEC SOLUTION<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-8df7131 e-con-full e-flex e-con e-child\" data-id=\"8df7131\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-38a426d elementor-widget__width-inherit elementor-widget elementor-widget-text-editor\" data-id=\"38a426d\" data-element_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>How to solve a pyrite problem<\/p>\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-afc9d6b elementor-widget elementor-widget-text-editor\" data-id=\"afc9d6b\" data-element_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 data-start=\"80\" data-end=\"307\">For existing constructions, the best solution to the pyrite problem is to replace the crushed stone with certified DB stone and to install a geotextile membrane as well as a vapor barrier between the fill and the concrete slab.<\/p><p data-start=\"1416\" data-end=\"1764\">\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1a330ea e-con-full e-flex e-con e-child\" data-id=\"1a330ea\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-50e8821 elementor-widget elementor-widget-text-editor\" data-id=\"50e8821\" data-element_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>Garage slab level<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-13fc101 e-con-full e-flex e-con e-child\" data-id=\"13fc101\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d14ca76 elementor-align-left elementor-widget elementor-widget-button\" data-id=\"d14ca76\" data-element_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-sm\" href=\"#\">\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\">Breaking and removing the concrete slab<\/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-72af158 elementor-widget__width-inherit elementor-widget elementor-widget-button\" data-id=\"72af158\" data-element_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-sm\" href=\"#\">\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\">Excavate pyrite backfill without exceeding footing level<\/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-f31999c elementor-align-left elementor-widget elementor-widget-button\" data-id=\"f31999c\" data-element_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-sm\" href=\"#\">\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\"> Repair cracks with epoxy or polyurethane injection<\/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-35fcd7f elementor-widget elementor-widget-button\" data-id=\"35fcd7f\" data-element_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-sm\" href=\"#\">\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\">Install a geotextile membrane on undisturbed soil<\/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-671a2dd elementor-widget elementor-widget-button\" data-id=\"671a2dd\" data-element_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-sm\" href=\"#\">\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\">Reinforcing foundation walls with steel plates<\/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-214e122 elementor-widget elementor-widget-button\" data-id=\"214e122\" data-element_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-sm\" href=\"#\">\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\">Backfill with DB-certified crushed stone<\/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-1033774 elementor-widget elementor-widget-button\" data-id=\"1033774\" data-element_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-sm\" href=\"#\">\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\">Installing a polyethylene vapour barrier<\/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-be4e3cb elementor-widget elementor-widget-button\" data-id=\"be4e3cb\" data-element_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-sm\" href=\"#\">\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\">Pouring a new reinforced concrete slab<\/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>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1f69a0c e-con-full e-flex e-con e-child\" data-id=\"1f69a0c\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-660d112 elementor-widget__width-inherit elementor-widget elementor-widget-text-editor\" data-id=\"660d112\" data-element_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>Basement slab level<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-29eba36 e-con-full e-flex e-con e-child\" data-id=\"29eba36\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-083c80f elementor-align-left elementor-widget elementor-widget-button\" data-id=\"083c80f\" data-element_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-sm\" href=\"#\">\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\">Remove interior partitions and subfloors<\/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-846b12f elementor-widget__width-inherit elementor-widget elementor-widget-button\" data-id=\"846b12f\" data-element_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-sm\" href=\"#\">\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\">Breaking and removing the concrete slab<\/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-ed2b2a9 elementor-align-left elementor-widget elementor-widget-button\" data-id=\"ed2b2a9\" data-element_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-sm\" href=\"#\">\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\">Excavate pyrite backfill<\/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-e65e9a2 elementor-widget elementor-widget-button\" data-id=\"e65e9a2\" data-element_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-sm\" href=\"#\">\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\">Repair exterior cracks with epoxy or polyurethane injection<\/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-2de4ea5 elementor-widget elementor-widget-button\" data-id=\"2de4ea5\" data-element_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-sm\" href=\"#\">\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\">Backfill with DB-certified crushed stone<\/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-a9cf926 elementor-widget elementor-widget-button\" data-id=\"a9cf926\" data-element_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-sm\" href=\"#\">\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\">Install a geotextile membrane on undisturbed soil<\/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-88584f7 elementor-widget elementor-widget-button\" data-id=\"88584f7\" data-element_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-sm\" href=\"#\">\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\">Installing a polyethylene vapour barrier<\/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-1e51757 elementor-widget elementor-widget-button\" data-id=\"1e51757\" data-element_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-sm\" href=\"#\">\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\">Pouring a new reinforced concrete slab<\/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>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-39aa62a e-flex e-con-boxed e-con e-parent\" data-id=\"39aa62a\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-a64b7d9 e-con-full e-flex e-con e-child\" data-id=\"a64b7d9\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-511d77f elementor-widget elementor-widget-heading\" data-id=\"511d77f\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Good to know<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bd5d929 elementor-widget elementor-widget-text-editor\" data-id=\"bd5d929\" data-element_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 data-start=\"47\" data-end=\"313\">The presence of polyethylene vapor barriers installed under concrete slabs traps sulfuric acid and virtually eliminates the problem of concrete sulfate attack. Unfortunately, the practice of installing polyethylene under slabs has only become common since the 2000s.<\/p>\n<p><\/p>\n<p data-start=\"315\" data-end=\"556\">In the absence of a vapor barrier, sulfate attack deteriorates the underside of the slab, and problems often only appear 10 to 20 years after construction. Concrete swelling tends to cause the slab to expand both horizontally and vertically.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2986578 e-con-full e-flex e-con e-child\" data-id=\"2986578\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5781dbb elementor-widget elementor-widget-image\" data-id=\"5781dbb\" data-element_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\t\t\t<img decoding=\"async\" src=\"https:\/\/lesgoudronsduquebec.webloft.cloud\/wp-content\/uploads\/elementor\/thumbs\/pyrite-rdl20svaesww2h7o3jx1uin756venpl071rrihvrj4.jpg\" title=\"pyrite\" alt=\"Soul\u00e8vement et fissures dans une dalle de b\u00e9ton caus\u00e9s par la pyrite et la sulfatation, r\u00e9par\u00e9s par Les Goudrons du Qu\u00e9bec avec injection d\u2019\u00e9poxy, membrane g\u00e9otextile et pierre concass\u00e9e certifi\u00e9e DB \u00e0 Montr\u00e9al, Laval, Rive-Nord, Laurentides et Rive-Sud.\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\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-d6dce66 elementor-widget elementor-widget-text-editor\" data-id=\"d6dce66\" data-element_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>The horizontal expansion of the slab being restrained by the foundation walls, the uplift occurs toward the center of the building, creating a very characteristic void under the slab and forming raised cracks in star or cross shapes.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-304dd1e e-flex e-con-boxed e-con e-parent\" data-id=\"304dd1e\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-842f809 e-con-full e-flex e-con e-child\" data-id=\"842f809\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-134eaed elementor-widget elementor-widget-heading\" data-id=\"134eaed\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Geographical location<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ae3ee6d elementor-widget elementor-widget-text-editor\" data-id=\"ae3ee6d\" data-element_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>the main recorded cases<\/p>\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-7a7abcc elementor-widget elementor-widget-text-editor\" data-id=\"7a7abcc\" data-element_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 data-start=\"49\" data-end=\"146\">Although the phenomenon can affect all regions of Quebec, some areas are more seriously impacted:<\/p>\n<ul data-start=\"148\" data-end=\"294\">\n<li data-start=\"148\" data-end=\"179\">\n<p data-start=\"150\" data-end=\"179\">The South Shore of Montreal<\/p>\n<\/li>\n<li data-start=\"180\" data-end=\"238\">\n<p data-start=\"182\" data-end=\"238\">The eastern and western ends of the Island of Montreal<\/p>\n<\/li>\n<li data-start=\"239\" data-end=\"268\">\n<p data-start=\"241\" data-end=\"268\">Laval and the North Shore<\/p>\n<\/li>\n<li data-start=\"269\" data-end=\"294\">\n<p data-start=\"271\" data-end=\"294\">The Lower Laurentians<\/p>\n<\/li>\n<\/ul>\n<p><\/p>\n<p data-start=\"296\" data-end=\"444\">Note: This does not mean that other geographic areas are automatically spared. Numerous isolated cases have been reported throughout the province.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6b906ec e-con-full e-flex e-con e-child\" data-id=\"6b906ec\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8c20167 elementor-widget elementor-widget-image\" data-id=\"8c20167\" data-element_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\t\t\t<img decoding=\"async\" src=\"https:\/\/lesgoudronsduquebec.webloft.cloud\/wp-content\/uploads\/elementor\/thumbs\/Goudrons-du-Quebec_Problemes-1-rdl1ry801ysoqo2is86iv91xrkhz6bfzz8m5tp084g.jpg\" title=\"Goudrons-du-Quebec_Probl\u00e8mes\" alt=\"Soul\u00e8vement et fissures dans une dalle de b\u00e9ton caus\u00e9s par la pyrite et la sulfatation, r\u00e9par\u00e9s par Les Goudrons du Qu\u00e9bec avec injection d\u2019\u00e9poxy, membrane g\u00e9otextile et pierre concass\u00e9e certifi\u00e9e DB \u00e0 Montr\u00e9al, Laval, Rive-Nord, Laurentides et Rive-Sud.\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\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-0dc6b75 elementor-widget elementor-widget-text-editor\" data-id=\"0dc6b75\" data-element_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>For example, despite the fact that the town of Saint-Lambert is built entirely on bedrock and thus considered by many experts to be a pyrite-free zone, pyrite was still present under the homes in the area. The problem was not related to the nature of the soil, but rather to contaminated backfill from outside quarries.<\/p>\n<p>The thicker the backfill, the greater the swelling. This is why the problem is more prevalent in residential garages, where backfill is often up to 1 m thick, whereas under basement slabs it&#8217;s usually only 10 to 20 cm thick.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-7574c80 e-flex e-con-boxed e-con e-parent\" data-id=\"7574c80\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-5399103 e-con-full e-flex e-con e-child\" data-id=\"5399103\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d916682 elementor-widget elementor-widget-text-editor\" data-id=\"d916682\" data-element_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>Concerned about a problem with your foundation?<\/p>\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-63a78e7 elementor-widget elementor-widget-text-editor\" data-id=\"63a78e7\" data-element_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>Our team will offer you the best long-term solution to resolve your pyrite problem. Contact us to receive support from our specialists.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-64b6531 e-con-full e-flex e-con e-child\" data-id=\"64b6531\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3f17e66 elementor-widget elementor-widget-button\" data-id=\"3f17e66\" data-element_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-sm\" href=\"https:\/\/lesgoudronsduquebec.webloft.cloud\/en\/our-services\/\">\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\">Explore Our Services<\/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-e914dd8 elementor-widget elementor-widget-button\" data-id=\"e914dd8\" data-element_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-sm\" href=\"https:\/\/lesgoudronsduquebec.webloft.cloud\/en\/contact-us\/\">\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\">CONTACT US<\/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>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-751751e e-flex e-con-boxed e-con e-parent\" data-id=\"751751e\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-62e7e36 elementor-widget elementor-widget-heading\" data-id=\"62e7e36\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Free quote<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f95ef6a elementor-widget elementor-widget-text-editor\" data-id=\"f95ef6a\" data-element_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>Don&#8217;t ignore the first symptoms!<\/p>\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-4f71421 elementor-button-align-stretch elementor-widget elementor-widget-global elementor-global-2248 elementor-global-1242 elementor-widget-form\" data-id=\"4f71421\" data-element_type=\"widget\" data-settings=\"{&quot;step_next_label&quot;:&quot;Next&quot;,&quot;step_previous_label&quot;:&quot;Previous&quot;,&quot;button_width&quot;:&quot;100&quot;,&quot;step_type&quot;:&quot;number_text&quot;,&quot;step_icon_shape&quot;:&quot;circle&quot;}\" data-widget_type=\"form.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<form class=\"elementor-form\" method=\"post\" name=\"Quote Form \" aria-label=\"Quote Form \">\n\t\t\t<input type=\"hidden\" name=\"post_id\" value=\"2222\"\/>\n\t\t\t<input type=\"hidden\" name=\"form_id\" value=\"4f71421\"\/>\n\t\t\t<input type=\"hidden\" name=\"referer_title\" value=\"Les Goudrons du Qu\u00e9bec\" \/>\n\n\t\t\t\n\t\t\t<div class=\"elementor-form-fields-wrapper elementor-labels-above\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-text elementor-field-group elementor-column elementor-field-group-name elementor-col-50 elementor-field-required\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"text\" name=\"form_fields[name]\" id=\"form-field-name\" class=\"elementor-field elementor-size-sm  elementor-field-textual\" placeholder=\"FULL NAME\" required=\"required\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-text elementor-field-group elementor-column elementor-field-group-field_d9517d3 elementor-col-50\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"text\" name=\"form_fields[field_d9517d3]\" id=\"form-field-field_d9517d3\" class=\"elementor-field elementor-size-sm  elementor-field-textual\" placeholder=\"ADDRESS \/ CITY\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-email elementor-field-group elementor-column elementor-field-group-email elementor-col-50 elementor-field-required\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"email\" name=\"form_fields[email]\" id=\"form-field-email\" class=\"elementor-field elementor-size-sm  elementor-field-textual\" placeholder=\"E-MAIL\" required=\"required\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-tel elementor-field-group elementor-column elementor-field-group-field_fc0e89d elementor-col-50\">\n\t\t\t\t\t\t\t<input size=\"1\" type=\"tel\" name=\"form_fields[field_fc0e89d]\" id=\"form-field-field_fc0e89d\" class=\"elementor-field elementor-size-sm  elementor-field-textual\" placeholder=\"PHONE\" pattern=\"[0-9()#&amp;+*-=.]+\" title=\"Only numbers and phone characters (#, -, *, etc) are accepted.\">\n\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-select elementor-field-group elementor-column elementor-field-group-field_1983946 elementor-col-100\">\n\t\t\t\t\t\t\t<div class=\"elementor-field elementor-select-wrapper remove-before \">\n\t\t\t<div class=\"select-caret-down-wrapper\">\n\t\t\t\t<i aria-hidden=\"true\" class=\"eicon-caret-down\"><\/i>\t\t\t<\/div>\n\t\t\t<select name=\"form_fields[field_1983946]\" id=\"form-field-field_1983946\" class=\"elementor-field-textual elementor-size-sm\">\n\t\t\t\t\t\t\t\t\t<option value=\"YOUR NEEDS\">YOUR NEEDS<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"DRAINAGE SYSTEMS\">DRAINAGE SYSTEMS<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"FOUNDATION ATERPROOFING\">FOUNDATION ATERPROOFING<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"FOUNDATION REPLACEMENT\">FOUNDATION REPLACEMENT<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"FOUNDATION REPAIR\">FOUNDATION REPAIR<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"BASEMENT LOWERING\">BASEMENT LOWERING<\/option>\n\t\t\t\t\t\t\t\t\t<option value=\"CRACK REPAIR\">CRACK REPAIR<\/option>\n\t\t\t\t\t\t\t<\/select>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-textarea elementor-field-group elementor-column elementor-field-group-message elementor-col-100\">\n\t\t\t\t\t<textarea 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class=\"elementor-button-text\">SEND<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/button>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/form>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Pyrite in concrete Pyrite is a sulfurous mineral found in small quantities in limestone or clay stones used for crushed stone fill. In the presence of both water and oxygen, pyrite oxidizes and produces sulfuric acid. The sulfuric acid then reacts with the calcium carbonates contained in the crushed stone as well as with the [&hellip;]<\/p>\n","protected":false},"author":15,"featured_media":2295,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2222","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Problem \u2013 Pyrite in concrete - Les Goudrons du Qu\u00e9bec<\/title>\n<meta name=\"description\" content=\"Pyrite in backfill can oxidize with moisture and oxygen, producing sulfuric acid that reacts with concrete, causing swelling and damage. 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