Aerated concrete block and preparing method thereof

Abstract

The present invention relates to an air-entrained concrete block and its manufacturing method, comprising cement, lime, polypropylene fiber and other components including one of fly ash, sand, gypsum, aluminum powder and waste slurry species or several. By optimizing the ingredients and process parameters of air-entrained concrete, the obtained air-entrained concrete blocks have the advantages of high strength, low shrinkage and crack prevention. At the same time, modified polypropylene fibers can improve the tensile strength of concrete structural materials, Impact strength, reduce the drying shrinkage value of concrete structural materials and prevent the formation and expansion of cracks during cement curing.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an aerated concrete block and a manufacturing method thereof. Background technique [0002] Air-entrained concrete blocks are made of siliceous materials and calcareous materials as the main raw materials, mixed with air-generating agent, stirred with water, formed pores by chemical reaction, and made through pouring molding, pre-curing cutting, autoclaving curing and other processes porous silicate products. Aerated concrete blocks have the following advantages: light weight, good thermal insulation performance, good fire resistance and no harmful gas emission, machinability, wide source of raw materials, high production efficiency, low production energy consumption, and meet the requirements of low-carbon economy Compared with clay solid bricks, every 10,000 cubic meters of production capacity can reduce burning bricks and destroying fields by 2.5 acres, reducing fl...

AI Technical Summary

Problems solved by technology

[0003] The existing aerated concrete blocks have defects in the ratio and manufacturing process: in the process of raw material processing and manufacturing, if the particle size of quicklime is not uniform, or the ratio of cement and lime is not suitable, it will cause the finished product The strength of the middle part of the body is not high, and cracks will appear during the process of exiting the kettle, clamping the billet, and cutting; The heat and expansion of the pulp is too fast in the early stage, the thickening and hardening ability of the blank body is insufficient in the later stage, and the plasticity of the blank body is poor. During the process of flipping and demolding in the air, cracks in the middle of the blank body are prone to appear, and the blank body is forced to be scrapped and pushed into the cutting pit. Middle; in the process of turning over and removing the bottom material, due to the mechanical deformation of some side plates or the cleaning of side plate adhesives is not clean, the center line of the side plate is not aligned with the center line of the cutting trolley, and the gap between the green body and the bottom-removing crane is too large. Large, when turned at 90 degrees, the green body has a small drop, and there are tiny cracks in the middle of the green body, which are generally invisible to the naked eye, but the cracks will be clearly visible when operating at high temperature and high pressure

[0004] There are many reasons for the cracks in the middle of the aerated concrete block body. The occurrence of each small crack will cause serious damage to the aerated concrete block body, greatly reduce the qualified rate of finished products, and increase the production cost of the enterprise. Increased transportation costs for disposal of damaged waste aerated concrete blocks