Sand pulp concrete waterproof agent and method for making same

Abstract

The invention discloses a mortar and concrete waterproofer. The waterproofer is characterized in that: the waterproofer comprises (part by weight) 70 to 90 parts of activation zeolite power, 0.3 to 2 parts of silane resin acceptor, 2 to 5 parts of stearic acid, 0.007 to 0.05 parts of alkylphenols polyethenoxy ether, 3 to 10 parts of magnesium lime, 1 to 6 parts of plaster, 5 to 10 parts of mekralon. The invention further relates to a preparation method for the mortar and concrete waterproofer. The waterproofer not only can increase the compactness, the pressive strength and the waterproof impermeability of the concrete, but also can prevent temperature difference gap through the delay and reduction of heat release of hydration, reduce the shrinkage of the cement gelatin to reduce the drying shrinkage of the concrete. A slight expansion of the concrete a compensation of a shrinking gap can increase the cracking resistance. The invention can also improve the operation performance of the mortar and the concrete, restrain an alkali-aggregate reaction and increase long term strength of the concrete and enhance the wear, and is particularly suited to serving as an admixture of the mortar and the concrete.

Description

technical field [0001] The invention belongs to building material additives, in particular to a mortar and concrete waterproofing agent and a preparation method thereof. Background technique [0002] There are two main types of existing mortar and concrete waterproofing agents: organosilicon-based waterproofing agents and inorganic aluminum salt-based waterproofing agents. The main components of silicone waterproofing agent are sodium methyl siliconate (potassium) and sodium siliconate (potassium), which is a water-soluble polymer with a small molecular weight. The waterproof membrane of methyl silicone ether, the waterproof membrane is surrounded by the constituent particles of concrete and has hydrophobic properties. Since the volume of concrete will shrink due to cold shrinkage or dry shrinkage during the pouring hardening process, the main disadvantage of silicone-based waterproofing agents is that they cannot compensate for the shrinkage cracks of concrete, so the shri...

AI Technical Summary

Problems solved by technology

However, due to the early-strength and quick-setting effect of this type of waterproofing agent, the early-stage hydrate structure is formed faster, so the structure is less dense. The faster the early-stage strength of concrete increases, the lower the later-stage strength. The coagulation effect will adversely affect the later strength of cement mortar or concrete, and the impermeability is also poor; in addition, the calcium sulfoaluminate generated in the early stage of hydration will be converted into ettringite, and there are 32 A water molecule needs a lot of water when it is formed, especially in the early stage of concrete pouring. If the humidity is not enough, it will be difficult to make it reach the expected expansion value even if the curing time is prolonged, thus affecting the waterproof performance. Therefore, it is important for the early wet curing of concrete. The requirements are particularly high, which makes the construction quality difficult to control

Furthermore, this type of waterproofing agent is mostly a liquid product, and it is inconvenient to measure and transport during use.