Carbonization-resistant waterproof slurry

Abstract

The invention relates to an anti-carbonization waterproof slurry. The anti-carbonization waterproof slurry of the present invention is a two-component organic and inorganic material composite slurry, and its component raw materials include: cement, quartz powder, redispersible latex powder, cellulose ether, superplasticizer, Hydrophobic agent, carbonation inhibitor, emulsion, water, defoamer, preservative. The carbonization inhibitor of the present invention is obtained by modifying the mixture of calcium oxide and calcium-based montmorillonite powder with mineral oil. After modification, the release of the active ingredient of the carbonization inhibitor can be effectively controlled, so that the entire coating thin layer is from the surface to the inside. Both can form a dense and uniform waterproof layer, effectively hinder the infiltration of water, obtain better anti-carbonization and waterproof performance, prolong the service life of the coating and obtain longer concrete protection time; the slurry is compatible with cement and other inorganic materials Capacitance is good, only need 1-2mm functional thin layer, you can get a good anti-carbonization and waterproof effect.

Description

technical field [0001] The invention relates to a waterproof slurry, in particular to an anti-carbonization waterproof slurry, which belongs to the technical field of waterproof materials in the construction industry. Background technique [0002] The so-called "carbonation" refers to the generation of Ca(OH) after the cement of the mixed concrete is hydrated. 2 , most of which exist in the concrete in a crystalline state, and become a reserve of pore fluid to maintain high alkalinity, and its pH value is 12.5~13.5. CO exists in the air 2 and moisture, CO in the air 2 It will penetrate into the concrete under the action of water and Ca(OH) 2 Reaction, reduce the pH value to 8.5~9.0, at this time the concrete has been carbonized. Carbonation of concrete is essentially a process in which the pH value of concrete decreases and loses its alkalinity. [0003] Concrete maintaining an alkaline environment is an important condition for the preservation of concrete structures an...

AI Technical Summary

Problems solved by technology

The above-mentioned patent uses waste concrete powder, and cheap steel slag powder and fly ash as raw materials to prepare anti-carbonization coatings. Although the waste materials can be fully utilized, the amount of chemical reagents is reduced, and the production cost is reduced, it does not reflect this. There are certain deficiencies in the performance indicators of the product in terms of waterproofing

[0007] Some published patent applications, such as CN 102503300A disclose a kind of ordinary Portland cement, dispersible latex powder, quartz sand, quartz powder, cellulose ether, One-component polymer cement waterproof mortar composed of silica fume, water reducing agent and defoamer; CN 10343969 A discloses a kind of ordinary Portland cement 52.5, granulated blast furnace powder 95#, penetrating agent (fatty alcohol polyoxygen Vinyl ether), expansion agent (ettringite or calcium hydroxide, magnesium hydroxide), silica fume, quartz sand, modified bentonite, modified sodium silicate, complexing agent (polyacrylic acid), crystal precipitation agent (polyethylene Diol) to prevent cement leakage crystalline waterproof coatings, etc., its anti-carbonization ability is still not ideal enough