Light high-strength ceramsite and preparation method thereof

Abstract

The invention provides light high-strength ceramsite comprising, by weight, 100 parts of solid raw materials and 1-15 parts of excitant. The solid raw materials include 100 parts of fly ash, 6-18 parts of high-aluminum fly ash, bauxite and red mud, 1-5 parts of micro-silica, 0.1-3 parts of surfactant and 6-24 parts of plasticizer. The excitant comprises 5-20 parts of alkali metal hydroxides and 80-95 parts of alkali metal silicates. The light high-strength ceramsite product is light and high in strength, the density level is 700-1100 kg / m<3>, the cylinder compressive strength can reach 10-20 MPa, and the ceramsite is not likely to be damaged. The ceramsite can be used for preparing lightweight aggregate high-performance concrete which serves as a load bearing structure and can be used for building wallboards, bridges, pipelines and the like, and has great application value.

Description

technical field

[0001] The invention relates to the technical field of environmental protection buildings, building materials and solid waste treatment and resource utilization, and specifically relates to a light-weight high-strength ceramsite and a preparation method thereof. Background technique

[0002] 1. Fly ash is a solid waste of coal-fired power generation. The annual output of fly ash in my country is about 600 million tons, and the comprehensive utilization rate is about 70%. There is a large amount of accumulation every year. If these fly ash are not treated, there will be Flying dust directly pollutes the atmosphere and poses a threat to the human respiratory system; in addition, if the fly ash is discharged into the water system, the toxic chemicals in it will pollute the domestic water and further threaten human health. The recycling is strongly supported by the state and local governments.

[0003] 2. Ceramsite is a kind of artificial lightweight aggregate wit...