Foamed concrete and preparation method thereof

Abstract

The invention provides foamed concrete and a preparation method thereof, and belongs to the technical field of building materials. The foamed concrete provided by the invention consists of the following components in percentage by mass: 25-55 percent of a gel material, 18-50 parts of light aggregate, 13-36 parts of water, 0.5-5 parts of a foaming agent, 0.03-0.5 part of a thickening agent and 0.03-0.5 part of enhanced fiber, wherein the gel material consists of cement and coal ash or superfine slag powder; the light aggregate consists of coarse light aggregates and fine light aggregates; the foaming agent is a hydrogen peroxide solution or an ammonium hydrogen carbonate; the thickening agent is powdered carboxymethylcellulose; the enhanced fiber is a lignin fiber or a polypropylene fiber or an alkali resistance glass fiber which is 5-20 mm long. The water prevention, sound isolation and heat isolation effects of the foamed concrete prepared by the invention are better than those of the existing foamed concrete. According to the method, the foaming process of processing various batches and scales of foamed concrete can be precisely controlled by in-situ foaming; the method can be suitable for large-scale production of high-quality foamed concrete.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a foam concrete and a preparation method thereof. Background technique [0002] At present, the construction of the foam concrete insulation system on the floor and roof, as well as the insulation boards and blocks (blocks) all adopt the foaming method of mechanical and physical (animal and plant composite) foaming agents, which are first prepared into foam, and then combined with The concrete slurry is mixed and stirred, and finally transported by mechanical pumping equipment for construction, which is used for on-site construction of various floors. The disadvantages are that large-scale mechanical equipment is required, and it is difficult to construct on the floors and roofs of high-rise buildings, and the foam pore size is uneven, the density is not easy to control, the strength is low, and the cost is high. A kind of foam concrete and its preparation...

AI Technical Summary

Problems solved by technology

The disadvantages are that large-scale mechanical equipment is required, and it is difficult to construct on the floors and roofs of high-rise buildings, and the foam pore size is uneven, the density is not easy to control, the strength is low, and the cost is high.

A kind of foam concrete and its preparation method introduced in the patented technology of application number 201010264056.X, use cement, ore powder, fly ash and water to stir first to form a slurry, then pour in the chemical foaming agent hydrogen peroxide to mix and stir, and then construct Although this method eliminates the complicated process of pre-preparing the foam and then mixing it into the cement slurry for physical foaming, and eliminates the damage of part of the processed foam when it is mixed into the cement slurry, the foaming agent is The foaming process in the slurry is not easy to control, which will cause uneven distribution of foam and uneven size of the bubbles. The present invention proposes an in-situ foamed concrete and its preparation method, which can solve the above-mentioned inconveniences in the current foamed concrete processing. Difficult to control foam pore size