Ultra-light cement-based composite foam material and preparation method thereof

Abstract

The invention relates to an ultra-light cement-based composite foaming material and a preparation method thereof. The preparation method comprises: uniformly stirring cement, fly ash, water reducer, foam pore regulator, pulp thickness regulator, fiber, foam stabilizing agent and mixing water to prepare pure pulp; diluting a physical foaming agent by 20 folds and making foam by a mechanical means;mixing the made foam into the stirred pure pulp, stirring uniformly again and obtaining foam pulp; adding a chemical foaming agent and a foaming accelerator into the obtained foam pulp, and pouring into a mold preheated to 40 DEG C; after the pouring is finished, curing the mold in a constant-temperature curing chamber at 40 DEG C, curing for 24 to 32 hours, demolding, and obtaining the ultra-light cement-based composite foaming material. In the invention, the foaming material is prepared by a method of combining physical foaming and chemical foaming; and the obtained product is low in density and very light, reaches a fireproof grade A, has a long service life and excellent comprehensive performance and is suitable to be widely used.

Description

technical field [0001] The invention relates to a building thermal insulation material, in particular to an ultra-light cement-based composite foaming material and a preparation method thereof. Background technique [0002] Using good thermal insulation technology and materials in construction and industry can often get twice the result with half the effort. Statistics show that for every ton of mineral wool insulation products used in construction, one ton of oil can be saved a year. For the insulation of industrial equipment and pipelines, the use of good insulation measures and materials can significantly reduce production energy consumption and costs, improve the environment, and at the same time have better economic benefits. [0003] The foam insulation materials currently used in building insulation are mainly organic foam materials and inorganic foam materials. Organic foam insulation materials mainly include polystyrene foam, polyurethane rigid foam, etc. Inorgan...

AI Technical Summary

Problems solved by technology

According to the requirements of relevant standards, the thermal conductivity of EPS is ≤0.042W / (m K), and the thermal conductivity of XPS is usually 0.030~0.040W / (m K). The thermal insulation effect is good, but there are the following main problems: i) Poor fire safety, Fire accidents occur frequently in thermal insulation projects, causing heavy casualties and economic losses; ii) poor weather resistance and durability, and cannot last the same life as the building. During the service period of the building, the insulation layer needs to be replaced many times, wasting a lot of manpower, material and financial resources

Disadvantages are: expensive, poisonous gas emitted during spraying, wind blowing affects spraying, humidity affects bonding, large shrinkage (up to 2%), poor fire safety, large smoke when burning, high toxicity, poor aging resistance, and durability cannot be compared with On par with inorganic insulation materials

However, there are still many defects in the currently disclosed inorganic foam materials, such as heavy weight (air-entrained concrete and foam concrete usually have a dry density greater than 300kg / m3), high brittleness, easy cracking, high water absorption, and poor thermal insulation effect, which cannot meet the needs of the industry. The need for building thermal insulation limits its application scale

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