Nano SiO2 high-strength waterproof impermeable mortar and preparation method thereof

Abstract

The invention provides nano SiO2 high-strength waterproof impermeable mortar and a preparation method thereof. The waterproof impermeable mortar is prepared from the following raw materials: cement, water, sand, fly ash, nano SiO2 dispersion liquid and the like. By adding other active materials such as the nano SiO2, the polypropylene fibers and the early strength agent, the cement-based material can be brought into pores inside the cement-based material under the carrying action of water, particularly capillary pores with small sizes, to absorb water and expand, so that a filling effect is achieved. Besides, nano SiO2 can participate in and promote hydration reaction, and produced fine and regular hydrated crystalline substances are attached to the peripheries of pores, so that the microstructure is densified, a dense impermeable area is formed in the deep position of the interior of the cement-based material, and the waterproof and impermeable performance of the cement-based material is greatly improved. The added nano SiO2 can improve the microstructure of the cement-based material and inhibit the generation of cracks, so that the strength, seepage resistance and durability of the cement-based material are improved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a nano-SiO 2 High-strength waterproof and anti-seepage mortar and its preparation method. Background technique [0002] With the rapid growth of my country's economy, the investment in infrastructure construction and other aspects of the country is also increasing year by year. The advantages of convenient use, low price and good durability of concrete structure are still the most popular building materials in modern buildings. . However, as a loose and porous material, concrete has a large number of capillary pores, cracks and weak areas inside, so that its impermeability cannot meet the requirements. In fact, various leakage phenomena in modern construction projects have become common. [0003] In order to improve the anti-seepage performance of concrete, different types of waterproofing agents will be added to ordinary concrete in engineering, mainly divided into s...

AI Technical Summary

Problems solved by technology

In response to this problem, many people choose to increase the solubility of the waterproofing agent. Although there is a certain improvement effect, it will greatly reduce the strength and toughness of the concrete, and seriously cause cracks in the concrete structure.

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