Heap foam concrete and construction method thereof

Abstract

The invention discloses heap foam concrete and a construction method thereof. The heap foam concrete is characterized by being prepared from 38-56 parts by weight of self-leveling foam concrete slurryand 44-62 parts by weight of a prefabricated block, wherein the self-leveling foam concrete slurry is formed by mixing and stirring cement, fly ash, a polycarboxylic acid water reducing agent, carboxymethyl cellulose ether, water and foam, and the prefabricated block is a foam concrete block with the particle size not smaller than 40 mm in a dry state and is in the shape of any one or a combination of two of spheres and sphere-like bodies; when the heap foam concrete is constructed, blocks prefabricated in advance are naturally stacked and fully filled in a site where a template or a templatesubstitute is arranged or a site with a natural barrier to form a heap; and then, the self-leveling foam concrete slurry meeting the requirements is directly poured on the surface of the heap, and heap gaps are automatically filled without vibration to form the heap foam concrete, so that the method has the advantages of reducing the manual labor cost, improving the construction efficiency, improving the construction environment and improving the pouring body quality.

Description

technical field [0001] The invention belongs to the technical field of construction, and in particular relates to a heap foam concrete and a construction method thereof. Background technique [0002] Foam concrete material has good fluidity, low density, light weight, and greater strength than conventional backfill soil, so it is often used for subway backfill, underground pipe gallery backfill, bridge and culvert backfill, light cushion of buildings, abandoned cavern filling and pipeline backfill In engineering, it has obvious technical advantages. When foam concrete is backfilled, the foam concrete is usually stirred and mixed on site, and then filled with fluid foam concrete. However, the above-mentioned backfill projects often involve the construction of large-volume foam concrete. The amount of cementitious material in the single-sided foam concrete is large, and the heat of hydration of the pouring body is large. , the internal and external temperature difference is e...

AI Technical Summary

Problems solved by technology

When foam concrete is backfilled, the foam concrete is usually stirred and mixed on site, and then filled with fluid foam concrete. However, the above-mentioned backfill projects often involve the construction of large-volume foam concrete. The amount of cementitious material in the single-sided foam concrete is large, and the heat of hydration of the pouring body is large. , the internal and external temperature difference is easy to produce temperature cracks, and the surface foam concrete loses water too quickly due to high temperature evaporation, which will cause the surface strength to decrease

In order to reduce the impact of cement hydration heat on the quality of the filling body, traditional large-volume foam concrete construction often adopts methods such as increasing the amount of mixed materials, using retarders, and pouring in blocks and layers. These measures lead to low construction efficiency and poor construction efficiency. The cycle is long, which is not conducive to the efficient construction of the project