Aerated concrete manufactured by stone material waste and manufacturing method thereof

Abstract

The invention discloses aerated concrete manufactured by stone material waste. The aerated concrete is manufactured by a pretreated stone powder material, slag ash, cement, unslaked lime, desulfurized gypsum, powdered aluminum paste and a hyper-dispersant, wherein the pretreated stone powder material is produced by crushing, mixing and grinding stone material machining waste and waste aerated concrete building blocks. The stone material machining waste and industrial wet furnace slag ash are machined and re-treated, the utilization problem of a stone material and other waste is effectively solved, energy is saved, and environment is protected. A related manufacturing process is simple and low in cost. The hyper-dispersant can effectively improve the dispersing performance of concrete slurry, the viscous resistance of stone powder granules is reduced, and early-stage coordination between aeration and densification of the slurry is ensured, so that the aerated concrete has the advantages of being low in drying shrinkage value, good in thermal insulation property, high in compressive strength and the like. In addition, natural stone material waste, waste aerated concrete and furnace slag ash are recycled to slow down soil degradation, underground water pollution, dust pollution and other environmental problems, and the aerated concrete is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a stone waste aerated concrete and a preparation method thereof. Background technique [0002] The preparation of traditional aerated concrete blocks (AAC) is through the interaction of siliceous materials and calcareous materials under high temperature and pressure conditions to form C-S-H and tobermolite to generate strength. With the increasingly severe energy situation and increasing industrial solid waste, environmental protection and ecological sustainable development have become the focus of research. Air-entrained concrete has significant advantages such as light weight, heat preservation, sound insulation, and earthquake resistance. At the same time, it has strong machinability and has great market development prospects. In recent years, the recovery and treatment of various industrial slag solid wastes to prepare aerated concrete blocks has achieved good economic, env...

AI Technical Summary

Problems solved by technology

[0003] However, the following problems exist in the application of stone powder or tailings slag powder to aerated concrete: 1) The particle size of stone powder or tailings slag powder is large, strong water absorption, easy to agglomerate powder particles, and the mixed slurry usually lags behind due to gas generation Incomplete gas generation occurs during the slurry thickening process, which leads to problems such as excessive bulk density and low strength; 2) Partially replacing stone powder with mineral dispersants such as slag ash can delay the thickening speed of slurry to a certain extent, but replacing 3) When the stone powder or tailings slag powder aerated concrete body is cut, the large viscous resistance formed after the slurry thickens seriously affects the surface quality of the concrete block , there will be a rough feeling, which is not conducive to the leveling of the wall surface in the later stage; 4) If the traditional superplasticizer can delay the thickening speed of the slurry, but it is easy to cause the thickening to lag behind the gas generation process, resulting in The slump rate is high, the internal pores are unevenly distributed, the structure is weak, and the strength is not up to standard

These problems limit the popularization and application of stone powder in the actual production of air-entrained concrete

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