Coal gangue-fly ash foam concrete

Abstract

A coal gangue-fly ash foam concrete relates to lightweight foam concrete. The invention is composed of coal gangue, fly ash, cement, lime, gypsum, filler and foaming agent. The invention utilizes coal gangue and fly ash industrial waste, which not only reduces product cost but also saves natural resources, and its product also has low cost, high strength, low thermal conductivity, good heat insulation performance, and can be directly plastered after masonry, etc. features. Therefore, the product of the present invention can be widely used in the single thermal insulation wall body (body of wall self-insulation and heat insulation) of outer wall, the internal and external partition wall of frame structure, the rear board wall of large closet; Inner wall of cold storage; thermal insulation layer of floor and roof; thermal insulation board.

Description

technical field [0001] The invention belongs to the technical field of lightweight building materials, in particular to lightweight foamed concrete. Background technique [0002] With the implementation of my country's wall reform and building energy-saving policies, the materials used in modern buildings are required to have properties such as light weight, high strength, heat preservation, heat insulation, waste utilization, and energy saving. Foamed concrete, as a new type of building material, possesses the above-mentioned properties and is widely used in modern construction projects. Existing foam concrete, as publication number is CN1824623A " foam concrete material and application thereof " patent, disclosed component and proportioning are: inorganic cementitious material cement: filler stone powder or mineral powder: blowing agent: the weight ratio of water is 30-60: 30-60: 0.5-2: 20-50. Another example is the "non-steam-cured foam concrete slab" patent with the pu...

AI Technical Summary

Problems solved by technology

Existing foam concrete mainly has the following shortcoming: (1) the mature cementitious material overwhelming majority that prepares foamed concrete at present is common cement, magnesia and magnesium chloride solution, and the cost of cementitious material is higher; (2) thermal conductivity Higher, generally 300~500kg / m 3 The thermal conductivity of foamed concrete is 0.08-0.186W / (m·K), and the heat insulation performance is not good; (3) the strength of foamed concrete is not high, 300-500kg / m 3 The foam concrete is difficult to meet the strength requirements of the wall material