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An anti-carbonation and concrete technology, applied in the direction of coating, etc., can solve the problem of weakening the protective effect of steel bars, and achieve the effect of preventing carbonation reaction, beautiful concrete structure, and preventing the intrusion of water
Inactive Publication Date: 2018-04-17
上海密恩诗化学建材有限公司
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At the same time, carbonation increases the number of hydrogen ions in the concrete pore solution, thus weakening the protective effect of concrete on steel bars
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Embodiment 1
[0029] This embodiment provides a preparation process of a water-based concrete anti-carbonization paint primer, intermediate paint and top coat.
[0030] The primer is 450kg of deionized water, 2kg of polyether polyurethane associative rheology aid with 25% solid content, 3kg of defoaming agent, and 30kg of lauryl alcohol fat. Mix evenly at a speed of 600-800rpm, and then slowly add special penetration Mix 500kg of thickener evenly, add 2kg of thickener after about 30 minutes, continue to stir at a constant speed for 30 minutes, measure its pH value to 7-8, and its viscosity to be 82KU.
[0031] The middle layer paint is two-component, component A is mixed with 100kg of deionized water, 150kg of emulsion, 15kg of anti-carbonization additive, and 0.5kg of anti-fungal agent. Component B is mixed evenly with 500kg of special cement, 500kg of quartz sand, and 2kg of nano-scale silicate reinforcing agent. Where A:B=1:4.
[0032] Use 700kg of acrylic emulsion for the topcoat, sti...
Embodiment 2
[0034] The difference between this example and Example 1 is that the content of each component is different. Specifically, the primer uses 200kg of deionized water, 1kg of polyether polyurethane associative rheology aid with 25% solid content, and 1.5kg of defoamer. 13 kg of lauryl alcohol fat, 1 kg of thickener.
[0035] The middle layer paint is two-component, Component A uses 65kg of water, 65kg of emulsion, 7.5kg of anti-carbonation additive, and 0.08kg of anti-fungal agent. Component B is mixed evenly with 250kg of special cement, 25kg of quartz sand, and 1kg of nano-scale silicate reinforcing agent.
[0036] The topcoat uses 350kg of acrylic emulsion, 25kg of deionized water, 1.1kg of antifungal agent, 105kg of heavy calcium powder, 18kg of film-forming aid, 7kg of antioxidant, 0.5kg of defoamer, and 0.6kg of thickener.
[0037] Based on the above, the present invention has the advantage that: the present invention uses nano-scale silicate material and organosiloxane co...
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Abstract
The invention relates to the technical field of concrete, solves the problem that concrete is carbonized, and in particular relates to an aqueous concrete anti-carbonization coating. The aqueous concrete anti-carbonization coating is composed of three parts: a primer, middle paint and surface paint. The primer contains the following raw materials in percentage by weight: deionized water, a flatting agent, a defoamer, a film forming agent, a special penetrant and a thickener; the middle paint contains two components: the component A contains the following raw materials: deionized water, an emulsion, an anti-carbonization assistant and a mildew preventive; the component B contains the following raw materials: special cement, quartz sand and an enhancer, wherein the components A and B are uniformly mixed in a proportion of 1: 4; the surface paint contains the following raw materials: an acrylic emulsion, deionized water, a mildew preventive, corrosion-resistant pigments and filler, a filmforming agent, a special assistant, a defoamer, a thickener and a flatting agent. The aqueous concrete anti-carbonization coating provided by the invention prevents carbonization reaction of concreteeffectively, improves the impervious performance of concrete, reduces the permeability in corrosive ions in water such as chlorine ions and improves the freeze-thaw stability of concrete while preventing carbonization reaction of concrete.
Description
technical field [0001] The invention relates to the technical field of concrete, in particular to a water-based concrete anti-carbonization coating. Background technique [0002] With the rapid development of the economy, whether it is house construction, bridge construction, etc., a large number of concrete structures are used. As these engineered structures age, the durability of concrete materials and structures is of increasing concern. Concrete carbonation is one of the important indicators of concrete, and it is a kind of chemical corrosion suffered by concrete. The CO2 gas in the air penetrates into the concrete and reacts with alkaline substances to form carbonate and water. The process of reducing the alkalinity of concrete is called concrete carbonation, also known as neutralization. After carbonization, the alkalinity of concrete is reduced. When carbonation exceeds the protective layer of concrete, under the condition of water and air, the concrete will lose it...
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