Heat-preserving composite foam concrete and preparation method thereof

Abstract

The invention discloses a formula of heat-preserving composite foam concrete, which comprises the following components based on parts by weight: 500-1000 parts of concrete, 500-1000 parts of admixture, 5-20 parts of additive, 1-30 parts of polyurethane grains, 5-20 parts of foaming agent and 500-900 parts of water. The preparation method the foam concrete comprises the following steps of: preparing foaming agent water solution, smashing the polyurethane into grains, and adjusting the sizes of the grains as required, wherein the diameters of the grains are 1-3mm; adding the polyurethane grains into the concrete, the residual water after preparing the foaming agent water solution, the additive and the admixture, and evenly stirring to obtain slurry; mixing and stirring the slurry with the foam prepared by the foaming agent water solution; and maintaining, pouring and shaping into the cast-in-situ foam concrete. The invention solves the problems of the coordination between the intensity of the foam concrete and the heat-conducting property and the treatment of the waste polyurethane. The foam concrete can guarantee the intensity and has better heat-insulating effect.

Description

technical field [0001] The invention belongs to the field of building materials, and discloses a thermal insulation composite foam concrete and a preparation method thereof. Background technique [0002] Foamed concrete refers to the preparation of a foaming agent aqueous solution into a foam by physical methods, and then adding the foam to the slurry made of cement-based cementitious materials, aggregates, admixtures, admixtures and water, after mixing, stirring, and pouring A kind of porous cast-in-place concrete and its products that are formed and maintained and are suitable for indoor and outdoor cushions, roof insulation, non-load-bearing walls or tunnels, foundation pit filling, etc. [0003] The cost of foam concrete without any aggregate or admixture is relatively high, because the amount of cement is large, so it is usually prepared by adding some light aggregates, such as polystyrene particles, ceramsite, etc. to prepare foam concrete. However, the thermal conduc...

AI Technical Summary

Problems solved by technology

The disadvantage is that the strength and thermal conductivity do not match. If the strength is required to be high, the thermal conductivity will be reduced; if the thermal conductivity is emphasized, the strength will often not meet the requirements.