Alloy powder concrete waterproofing agent and preparation method thereof

Abstract

The invention provides an alloy powder concrete waterproofing agent, which is characterized in that, by mass percentage, 79%-94% aluminum alloy oxide compound, 5%-20% magnesium oxide alloy compound, 0.2%-0.4% benzoate Class, 0.2% ~ 0.4% ethanolamines, 0 ~ 0.1% sodium alkylsulfonate, 0.1% ~ 0.2% nano silicon dioxide. Using its functions of water reduction, adsorption, diffusion and air entrainment to change the distribution of the internal pore structure of the concrete, significantly reduce the porosity, make the concrete produce closed air bubbles, thereby reducing the bleeding rate, and at the same time fill the pores inside the concrete, which can make the concrete later resist Permeability is greatly enhanced.

Description

technical field [0001] The invention relates to a concrete admixture, a novel powdery material used for concrete waterproofing. Background technique [0002] With the expansion of the application range and application field of concrete materials and the improvement of engineering quality requirements, the durability of concrete structures has gradually emerged. In recent decades, there have been endless cases of structural damage caused by concrete durability problems in construction projects. According to the relevant survey in 2001, there were 3,000 porous reinforced concrete beams in the country where steel corrosion occurred, and 2,300 porous prestressed concrete beams occurred alkali-aggregate reaction, and the investment in reinforcement and repair was about 400 million yuan. The problem of concrete durability failure or structural damage has attracted great attention from academia, engineering circles, design units and government departments. The durability of concre...

AI Technical Summary

Problems solved by technology

my country developed graded aggregate waterproof concrete in the 1950s. During preparation, in order to make the coarse and fine aggregate gradation meet the requirements of the ideal gradation curve, part of the sand and gravel must be discarded, which is time-consuming and material-consuming, and it is difficult to popularize and apply it in engineering.

In the 1960s, the technology of rich mortar waterproof concrete was proposed. This technology has the disadvantages of large amount of cement and low strength of waterproof concrete. These two technologies have not fundamentally solved the problem of leakage caused by shrinkage and cracking of concrete.

[0007] Modern concrete technology requires waterproof concrete to have comprehensive properties such as high impermeability, high strength, and pumpability. Therefore, it is difficult to use a single plasticizing water-reducing component, hydrophobic component, expansion component or air-entraining component to meet the engineering requirements. quality requirements