Low-density foam concrete and preparation method thereof

Abstract

The invention belongs to the field of building thermal insulation materials, and relates to low-density foam concrete and a preparation method thereof. The low-density foam concrete is prepared from the following raw materials in parts by weight: 690 to 740 parts of ordinary Portland cement, 200 to 250 parts of fly ash, 60 to 80 parts of silica fume, 0 to 50 parts of high-alumina cement, 60 to 70parts of hydrogen peroxide, 9 to 10 parts of a water reducing agent, 2 to 4 parts of rubber powder, 10 to 20 parts of a foam stabilizer, 3 to 5 parts of fibers and 450 to 500 parts of water. The sum of the ordinary Portland cement, the fly ash, the silica fume and the high-alumina cement is 1000 parts. The low-density foam concrete has the advantages of self-compaction, good flexibility, uniform bubble size and the like.

Description

technical field [0001] The invention belongs to the field of building thermal insulation materials, and in particular relates to a low-density foam concrete and a preparation method thereof. Background technique [0002] Foamed concrete is a general term for a large class of lightweight porous materials containing tiny, uniform and independent pores, which are based on cementitious materials and made by chemical foaming or physical foaming. [0003] There are a large number of evenly closed voids in the foam concrete, which has sound insulation, non-toxic and harmless, good thermal insulation performance and shock resistance, and because it is non-combustible and has the same service life as concrete materials, it has gradually been used in recent years. It is used in building thermal insulation construction; and because of its high fluidity, it can be self-compacting, and it is often used for foundation leveling and filling in high-risk areas of coal mines. However, foam c...

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Problems solved by technology

CN105541384B A kind of ultra-light foam concrete and preparation method thereof, utilize the sludge of concrete mixing station, prepare dry density at 200kg / m 3 Foam concrete within the range, but the preparation process is complicated, and there are many types of raw materials, which is not conducive to industrial production

In addition, there are limitations in existing reports on the mechanical properties of foam concrete. They only focus on compressive resistance, but not enough attention to flexural resistance. If the flexural resistance is not enough, it will be difficult to resist wind pressure, and the insulation board is easily torn by strong winds and fall off.

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