Reinforced foamed concrete and preparation method thereof

Abstract

The invention relates to the technical field of building materials, and discloses reinforced foamed concrete and a preparation method thereof, the reinforced foamed concrete comprises Portland cement,fly ash, aggregate, polyvinyl alcohol particles, a foam stabilizer, a mixed emulsion, an acrylamide reinforcing agent, hydrogen peroxide and other components. Compared with the prior art, the invention has the following advantages and effects: 1, through the acrylamide type reinforcing agent, the strength of the foamed concrete is improved, the traditional bidirectional effect of only adding polyacrylamide is overcome, and the compressive strength of the foamed concrete is improved; 2, by adding the mixed emulsion, the water seepage of the concrete is reduced, the water retention effect of the concrete is better, the probability of various problems such as cracking of the concrete is reduced, and the strength of the concrete is improved;.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a reinforced foamed concrete and a configuration method thereof. Background technique [0002] With the development of high-rise and long-span buildings, the self-weight of building materials has attracted more and more attention. As a porous material, foamed concrete plays an important role in the insulation layer of roofs, non-load-bearing walls and thermal pipes. At present, our country is in the period of wall reform. Foam concrete products have become one of the materials that can replace clay bricks due to their light weight, thermal insulation (heat insulation), energy saving and other excellent characteristics. Foam concrete is made by adding the foam made of foaming agent aqueous solution to the slurry composed of silicon-containing materials (fly ash, sand), calcareous materials (cement, lime), water and admixtures, after mixing and stirring, pouring, It is ...

AI Technical Summary

Problems solved by technology

[0003] Traditional foam concrete has very low strength (only 1-10MPa), can only be used in some filling projects, and cannot meet people's requirements for structural engineering

In recent years, there have been some studies on the preparation of high-strength foam concrete with low water-to-binder ratio and the use of microsilica fume and fly ash instead of sand. For example, foam concrete with a compressive strength of 60MPa has been prepared under special curing conditions, but this The production process of this method is relatively complicated and the versatility is not good

[0004] The existing patent publication number is "CN109592935A", which is a preparation method of high-strength foam concrete named "a preparation method of high-strength foam concrete", but this method utilizes bamboo fibers that are difficult to obtain, and does not solve the problem of foam concrete. The key problem of poor strength, so its 28d compressive strength is only about 20Mpa, and its practicability is limited

[0005] Admixture Polyacrylamide is a commonly used admixture to improve strength, but the amount of this admixture has certain restrictions, such as the paper "Zhang Yupei, Shen Xiangdong. Experimental research on the influence of polyacrylamide on the strength of cement soil [J] .Silicate Bulletin, 2012,31(006):1636-1640."It pointed out that if too much polyacrylamide is added, the particles will repel each other due to the excessive adsorption of polyacrylamide near the concrete particles, and instead Weaken the strength of concrete, and in foamed concrete, because there are a lot of air bubbles in the foamed concrete, the number of other particles near the concrete particles is much less than that of ordinary concrete, so adding a relatively small amount of polyacrylamide will cause the concrete Particle strength is reduced, so addressing this issue is critical

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