Microbial fly ash building material and preparation method thereof

Abstract

The invention relates to the field of novel building materials, in particular to a microbial fly ash building material and a preparation method thereof. The microbial fly ash building material is prepared from the following raw materials in parts by weight: 50-70 parts of waste incineration fly ash, 2-10 parts of silicon micro powder, 20-30 parts of fly ash, 3-5 parts of cement, 10-15 parts of slaked lime, 5-8 parts of red mud, 7-9 parts of steel slag powder, 0-30 parts of 50-80-mesh pearlite, 10-40 parts of bacterial liquid, 0-20 parts of nutrient solution, 2-4 parts of pure acrylic emulsion,0.5-1 part of Grade A potassium silicate, 0.05-0.2 part of polyacrylamide and 0.1-0.5 part of KH570 silane coupling agent. Various microorganism fly ash building material products including fly ash ceramsite, fly ash concrete, fly ash water permeable bricks and fly ash kerbs can be prepared through the method, the preparation method is environmentally friendly and free of pollution, the solid waste utilization rate is high, good environmental benefits are achieved, and good practical application value is achieved.

Description

technical field [0001] The invention relates to the field of new building materials, in particular to a microbial fly ash building material and a preparation method thereof. Background technique [0002] Fly ash generally refers to any solid particle in the flue gas produced by the combustion of fuel. Usually includes thermal power plant chimney and flue fly ash and waste incineration fly ash. [0003] Municipal solid waste incineration fly ash (MSWI fly ash) is a product of domestic waste incineration, accounting for 3-5% of waste incineration, because it contains a variety of heavy metals and dioxins and other organic poisons, and the leaching toxicity is relatively high , was included in the "National List of Hazardous Wastes" (code 772-002-18). The "Pollution Control Standards for Domestic Waste Landfill Sites" (GB 16889-2008) stipulates that waste incineration fly ash can only enter sanitary landfills for landfill disposal after solidification / stabilization treatment ...

AI Technical Summary

Problems solved by technology

However, the melting and solidification technology has not been used in China due to the high processing cost.

In short, at present, the processing cost of fly ash is relatively high, the total amount of fly ash to be processed is small, and it is impossible to consume fly ash on a large scale and cannot meet the processing demand of my country's growing fly ash production. It is necessary to find a new comprehensive disposal of fly ash Direction of development

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