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<\/p>\nIn today world, concrete is the most used material \/ product in construction industry. Concrete structures exposed to atmospheric carbon dioxide emitted from various sources, in presence of moisture \/ water, atmospheric carbon dioxide diffuses slowly through the concrete and the process of carbonation is initiated, the pH of concrete slowly turns acidic and starts rusting the reinforcing steel bars. Anti-carbonation coatings are used as surface treatments that have a high resistance to carbon dioxide. They shield the concrete from carbonation by acting as a barrier. For example, Fairmate\u2019s \u2018FAIRCOAT\u2019 is well known and is protecting several renowned structures in India.
\nFeatures of FAIRCOAT Anti-Carbonation Coatings
\nFAIRCOAT is a smooth protective, decorative anti-carbonation coating for interior & exterior surfaces with exceptional weathering characteristics. It is based on aliphatic elastomeric acrylic. It has been specially designed for the decoration and protection of concrete against attack from atmospheric carbon dioxide, airborne chlorides, acid rain, weathering etc. When it is applied on surface, it forms a flexible layer allows the surface to breath and acts as carbon dioxide barrier thus protecting the concrete in aggressive weather conditions. Properties include the following:<\/p>\n
\u2022 Anti-carbonation properties
\n\u2022 Excellent waterproof coating
\n\u2022 High flexibility with crack bridging capabilities up to 2mm
\n\u2022 UV resistant
\n\u2022 Excellent bonding characteristic with the substrate
\n\u2022 Chloride ion diffusion is zero as per ASTM C 1202
\n\u2022 Resistance to carbon dioxide diffusion is > 50mm thickness of equivalent air layer as per EN 1062
\n\u2022 Non-toxic and non-flammable
\n\u2022 Good weathering properties (anti-algal & anti-fungal).<\/p>\n
Concrete is a highly alkaline material and if un-carbonated it has a pH in the region of 12.6. Carbonation starts on the surface of the concrete and can ultimately reach the depth of the steel reinforcement within the concrete. The alkaline state of the concrete provides a passive resistive layer to the surface of the steel reinforcement that prevents corrosion.
\nOnce concrete comes into contact with carbon dioxide and other pollutants within the air, then a reaction may occur. Carbon dioxide can form carbonic acid with the water in the cement that then neutralizes the alkaline state of the concrete. If this happens, then carbonation moves through the concrete as a front that gradually reduces the pH value to 8pH; neutral is 7pH. However, corrosion to the reinforcement can occur if the pH value falls below 11pH.
\nCarbonation occurs when carbon dioxide reacts with calcium hydroxide of concrete and deposits as calcium carbonate, which reduces the protection of embedded steel reinforcement. This, in turn, results in reinforcing steel becoming susceptible to attack by water and oxygen, causing corrosion of the steel and eventually spalling of the concrete.<\/p>\n
<\/p>\n
Application Areas
\nExisting Building & Bridges: It can be applied as a protective coating in existing buildings and bridges to protect them from carbon dioxide, air borne chloride, and rain.
\nNew Buildings & Bridges: FAIRCOAT can be applied as an anti-carbonation coating in new buildings and bridges, which will enable it to resist attack by carbon dioxide, airborne chloride, and rain.
\nInterior Decoration of Buildings: As FAIRCOAT is non-flammable and has excellent waterproof characteristics, it can be used in interior decoration.
\nTo achieve effective anti-carbonation coating, a two-coat application is recommended. FAIRCOAT covers 3-4m2 per kg with a recommendation of two coats for a dark shade. The surface texture and porosity must be taken into account while estimating quantities.
\nFor more details visit: www.fairmate.com or email: enquiry@fairmate.com<\/p>\n","protected":false},"excerpt":{"rendered":"
In today world, concrete is the most used material \/ product in construction industry. Concrete structures exposed to atmospheric carbon dioxide emitted from various sources, in presence of moisture \/ water, atmospheric carbon dioxide diffuses slowly through the concrete and the process of carbonation is initiated, the pH of concrete slowly turns acidic and starts […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[],"class_list":["post-320","post","type-post","status-publish","format-standard","hentry","category-protective-coating"],"_links":{"self":[{"href":"https:\/\/www.fairmateprashita.com\/blog\/wp-json\/wp\/v2\/posts\/320","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fairmateprashita.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fairmateprashita.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fairmateprashita.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fairmateprashita.com\/blog\/wp-json\/wp\/v2\/comments?post=320"}],"version-history":[{"count":1,"href":"https:\/\/www.fairmateprashita.com\/blog\/wp-json\/wp\/v2\/posts\/320\/revisions"}],"predecessor-version":[{"id":322,"href":"https:\/\/www.fairmateprashita.com\/blog\/wp-json\/wp\/v2\/posts\/320\/revisions\/322"}],"wp:attachment":[{"href":"https:\/\/www.fairmateprashita.com\/blog\/wp-json\/wp\/v2\/media?parent=320"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fairmateprashita.com\/blog\/wp-json\/wp\/v2\/categories?post=320"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fairmateprashita.com\/blog\/wp-json\/wp\/v2\/tags?post=320"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}