A kind of high impermeability concrete and preparation method thereof

Abstract

The application relates to the field of concrete, and specifically discloses a high-impermeability concrete and a preparation method thereof. High impermeability concrete, the raw materials are calculated by weight, including 50-90 parts of Portland cement, 150-200 parts of aggregate, 30-50 parts of fly ash, 7-15 parts of admixture, and 25-45 parts of water; The above additives include cellulose, hydrophobic fumed silica, polydimethylsiloxane, surface Active agent; its preparation method is: S1, mixing cellulose, hydrophobic fumed silica, polydimethylsiloxane, and surfactant to prepare an admixture; S2, mixing the admixture with Portland cement, After the water is mixed evenly, add aggregate and fly ash and mix evenly to obtain high impermeability concrete. The application improves the concrete strength while improving the impermeability and frost resistance of the concrete.

Description

technical field [0001] This application relates to the field of concrete, more specifically, it relates to a kind of high impermeability concrete and its preparation method. Background technique [0002] Ordinary concrete is made by mixing and stirring cement, sand, stones and water in a certain proportion. In the environment of water seepage, the fine particles in the concrete solidification period are easy to rinse and lose the slurry. After curing, there are many voids in the concrete. It is large and easy to seep water, resulting in poor waterproof ability of concrete. Therefore, concrete buildings need to have certain impermeability when immersed in water for a long time. At present, the main method to solve the water seepage of concrete is to add waterproofing agent, but the current waterproofing agent formula is unreasonable, and its water resistance is not ideal after adding concrete. short. [0003] For example, the invention patent with the publication number N10...

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned related technologies, the inventor found in actual use that: the calcium sulfoaluminate expansion agent used in the above-mentioned concrete formula will lead to a higher heat of hydration of the concrete, which will lead to an increase in the internal temperature of the concrete structure, making the inside and outside of the concrete structure The temperature difference is large, and the shrinkage and deformation of the concrete are relatively large, which makes the concrete prone to cracking and penetration.