{"id":277914,"date":"2021-01-08T12:15:57","date_gmt":"2021-01-08T12:15:57","guid":{"rendered":"https:\/\/www.sanier.pl\/bw-hasla\/cement\/"},"modified":"2025-02-06T11:55:52","modified_gmt":"2025-02-06T11:55:52","slug":"cement","status":"publish","type":"knowledgebase","link":"https:\/\/www.sanier.pl\/en\/bw-hasla\/cement\/","title":{"rendered":"Cement"},"content":{"rendered":"<p>[vc_row][vc_column][vc_column_text]<\/p>\n<h2><strong>Cement - What Is It?<\/strong><\/h2>\n<p>Cement is a <strong>hydraulic mineral binder<\/strong> obtained from mineral raw materials (<strong>marl or limestone and clay<\/strong>) fired into <strong>clinker<\/strong> in a cement kiln and then ground with <strong>gypsum<\/strong>, which acts as a setting time regulator. It is used to prepare <strong>cement mortars, cement-lime mortars, and concrete<\/strong>. Cement is widely used in construction for bonding building materials.<\/p>\n<p>Cement is a commonly used <strong>structural adhesive<\/strong>, meaning it is a mixture that, when combined with water and other components, can harden in <strong>both water and air<\/strong>. Once this slurry hardens, it forms <strong>strong and durable construction materials<\/strong> such as <strong>concrete, mortar, and plaster<\/strong>.<\/p>\n<p>Concrete is used to construct <strong>slabs, reinforced concrete floors, and stairs<\/strong>. Mortar is essential for building <strong>walls from bricks, hollow blocks, or stones<\/strong>. <strong>Plaster<\/strong> is applied to <strong>finish both interior and exterior walls<\/strong>. Paving stones, piles, and <strong>fence boards<\/strong> are made from cement-containing mixtures. Depending on its composition, cement comes in various types.<\/p>\n<p>There are <strong>many specialized cement products<\/strong> available on the market, and <strong>various types of cement<\/strong> are suitable for home construction.<\/p>\n<h3><strong>Cement Classification:<\/strong><\/h3>\n<ul>\n<li><strong>CEM I<\/strong> \u2013 Portland cement<\/li>\n<li><strong>CEM II<\/strong> \u2013 Composite Portland cement<\/li>\n<li><strong>CEM III<\/strong> \u2013 Blast furnace cement<\/li>\n<li><strong>CEM IV<\/strong> \u2013 Pozzolanic cement<\/li>\n<li><strong>CEM V<\/strong> \u2013 Multi-component cement<\/li>\n<\/ul>\n<h3><strong>Strength Classes<\/strong><\/h3>\n<p>Depending on <strong>compressive strength<\/strong> (measured after <strong>28 days<\/strong>) according to <strong>PN-EN 196-1<\/strong>, cement is classified into three <strong>strength classes<\/strong> (compressive strength in <strong>N\/mm\u00b2<\/strong>; <strong>1 MPa = 1 N\/mm\u00b2<\/strong>):<\/p>\n<ul>\n<li><strong>Class 32.5<\/strong><\/li>\n<li><strong>Class 42.5<\/strong><\/li>\n<li><strong>Class 52.5<\/strong><\/li>\n<\/ul>\n<p>These three <strong>classes<\/strong> are further divided based on <strong>early strength<\/strong>:<\/p>\n<ul>\n<li><strong>Cement with high early strength<\/strong> (marked with <strong>R<\/strong>): <strong>32.5R, 42.5R, 52.5R<\/strong><\/li>\n<li><strong>Cement with normal early strength<\/strong> (marked with <strong>N<\/strong>): <strong>32.5N, 42.5N, 52.5N<\/strong><\/li>\n<\/ul>\n<h3><strong>Composition of Cement<\/strong><\/h3>\n<ul>\n<li><strong>Main Components<\/strong> \u2013 Specially selected <strong>inorganic materials<\/strong>, constituting <strong>more than 5%<\/strong> of the total mass of all primary and secondary components.<\/li>\n<li><strong>Secondary Components<\/strong> \u2013 Specially selected <strong>inorganic materials<\/strong>, constituting <strong>no more than 5%<\/strong> of the total mass.<\/li>\n<li><strong>Calcium Sulfate<\/strong> \u2013 Added during cement production to regulate <strong>setting time<\/strong>. It can appear as <strong>gypsum, hemihydrate, or anhydrite<\/strong>, or a mixture of these. <strong>Gypsum and anhydrite<\/strong> occur as <strong>natural materials<\/strong>, but <strong>calcium sulfate<\/strong> can also be obtained as a <strong>by-product of industrial processes<\/strong>.<\/li>\n<li><strong>Additives<\/strong> \u2013 Used to <strong>facilitate production<\/strong> or <strong>enhance the properties<\/strong> of cement. The total amount of <strong>additives should not exceed 1%<\/strong> of the cement mass (<strong>except for pigments<\/strong>). Organic additives should not exceed <strong>0.5%<\/strong> of cement mass in dry form and must <strong>not cause reinforcement corrosion<\/strong> or deteriorate the <strong>properties of cement, concrete, or mortar<\/strong>.<\/li>\n<\/ul>\n<p>If <strong>admixtures<\/strong> are added to cement <strong>(for concrete, mortar, or grouts)<\/strong> according to <strong>EN 934 standards<\/strong>, the <strong>standardized name<\/strong> of the admixture must be indicated <strong>on the packaging or in the delivery documentation<\/strong>.<\/p>\n<p><strong>Learn More About Cement<\/strong> \u2013 <a href=\"https:\/\/www.sanier.pl\/en\/aktualnosci-en\/portland-cement\/\"><em>Click here for details!<\/em><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_single_image image=\"256808\" img_size=\"large\" alignment=\"center\"][\/vc_column][\/vc_row]<\/p>\n","protected":false},"author":1,"featured_media":280346,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","categories":[873],"tags":[],"class_list":["post-277914","knowledgebase","type-knowledgebase","status-publish","has-post-thumbnail","hentry","category-knowledge-base"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.sanier.pl\/en\/wp-json\/wp\/v2\/knowledgebase\/277914","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sanier.pl\/en\/wp-json\/wp\/v2\/knowledgebase"}],"about":[{"href":"https:\/\/www.sanier.pl\/en\/wp-json\/wp\/v2\/types\/knowledgebase"}],"author":[{"embeddable":true,"href":"https:\/\/www.sanier.pl\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sanier.pl\/en\/wp-json\/wp\/v2\/comments?post=277914"}],"version-history":[{"count":0,"href":"https:\/\/www.sanier.pl\/en\/wp-json\/wp\/v2\/knowledgebase\/277914\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.sanier.pl\/en\/wp-json\/wp\/v2\/media\/280346"}],"wp:attachment":[{"href":"https:\/\/www.sanier.pl\/en\/wp-json\/wp\/v2\/media?parent=277914"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sanier.pl\/en\/wp-json\/wp\/v2\/categories?post=277914"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sanier.pl\/en\/wp-json\/wp\/v2\/tags?post=277914"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}