Impermeable and anti-crack concrete and preparation method thereof

Abstract

The invention relates to the field of anti-seepage concrete, in particular to anti-seepage and anti-crack concrete and a preparation method thereof. The concrete comprises cement, river sand, gravel, fly ash, mineral powder, water, a cellulose synergist, an expanding agent, polypropylene staple fibers, sodium dioctyl sulfosuccinate and a polycarboxylate superplasticizer. The preparation method comprises the following steps: modifying the polypropylene staple fibers to obtain the modified polypropylene staple fibers, uniformly mixing and stirring the river sand, the broken stones, the expanding agent and the polypropylene staple fibers to obtain a dry material, uniformly mixing the polycarboxylate superplasticizer, the water, the dioctyl sodium sulfosuccinate and the cellulose synergist to obtain an additive solution, uniformly mixing and stirring the admixture solution, cement, fly ash and mineral powder to obtain cement paste, adding the cement paste into the dry material, and uniformly performing stirring to obtain the anti-seepage and anti-crack concrete. The anti-cracking concrete has the effect of improving the anti-cracking performance of the anti-seepage concrete.

Description

technical field [0001] The invention relates to the field of impervious concrete, in particular to an impermeable and crack-resistant concrete and a preparation method thereof. Background technique [0002] Impermeable concrete refers to concrete with high density, which makes it difficult for water to penetrate through. Impermeable concrete needs to be able to resist at least 0.6MPa of hydrostatic pressure. Impermeable concrete is widely used in underwater piles, underwater engineering and other fields. [0003] The commonly used method to improve the impermeability is to increase the amount of glue in the concrete mix ratio and increase the air content of the concrete, but the increase in the air content and the decrease in the water-binder ratio both increase the risk of cracks in the concrete, or the impermeable concrete is The severe shrinkage during the hydration process leads to cracking of the impermeable concrete, and these cracks will greatly reduce the workability...

AI Technical Summary

Problems solved by technology

[0003] The commonly used method to improve the impermeability is to increase the amount of glue in the concrete mix ratio and increase the air content of the concrete, but the increase in the air content and the decrease in the water-binder ratio both increase the risk of cracks in the concrete, or the impermeable concrete is The severe shrinkage during the hydration process leads to cracking of the impermeable concrete, and these cracks will greatly reduce the workability and durability of the impermeable concrete