Underwater dispersion-resistant concrete additive for building

Abstract

The invention discloses an underwater dispersion-resistant concrete additive for a building. The underwater dispersion-resistant concrete additive is prepared from the following components in parts byweight: 1 to 2 parts of methylcellulose, 1 to 2 parts of hydroxypropyl methyl starch, 2 to 5 parts of zeolite powder, 10 to 15 parts of stearic acid, 10 to 12 parts of naphthalene-based superplasticizer, 1 to 2 parts of sepiolite fibers, 3 to 5 parts of polyacrylamide, 1 to 3 parts of polyvinyl alcohol, 3 to 5 parts of sodium aluminate, 20 to 22 parts of polycarboxylate superplasticizer, 63 to 73parts of water, and 10 to 12 parts of polyacrylamide. By adopting the underwater dispersion-resistant concrete additive, the cohesiveness, the mobility, the dispersion resistance and the self-compacting performance of the concrete can be comprehensively improved, so that a mixture is not isolated and dispersed, is self-leveled and self-compacted without being vibrated, the water on the original poured surface can be extruded, after the mixture is cured, and the mixture has good adhesion with the surface of the original concrete surface; and the methylcellulose and the polyacrylamide are usedas the anti-scattering agent, so that the concrete has good cohesiveness and water scouring resistance.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an underwater anti-dispersion concrete admixture for building water. Background technique [0002] At present, ordinary concrete is directly poured underwater. Due to the action of water erosion, the cement paste in the concrete mixture is severely separated from the aggregate, and the cement paste will be washed away by the water flow. Not only is there less cement paste in the cast body, but also Moreover, the water / glue ratio is greatly increased, the uniformity of the concrete structure is extremely poor, and the strength and durability are seriously reduced. It is unimaginable to use ordinary concrete for underwater pouring to pollute the surrounding water environment and damage aquatic organisms. Over the years, in order to improve the quality of ordinary concrete poured underwater structures, engineering units have also adopted a variety of special construction...

AI Technical Summary

Problems solved by technology

It is unimaginable that the use of ordinary concrete for underwater pouring will cause pollution to the surrounding water environment and damage to aquatic organisms.

Over the years, in order to improve the quality of ordinary concrete poured underwater structures, engineering units have also adopted a variety of special construction methods, such as the use of cofferdam drainage method, bag stacking method, pre-filled aggregate grouting method or the use of conduits, bottom openings Containers and other construction tools are used for construction, but practice has proved that there are still many shortcomings in the use of these traditional construction methods, not only the amount of work is large, but also a little carelessness, engineering quality accidents are inevitable, and there are many examples of failure