Foaming cement, preparation method and application thereof

Abstract

The invention provides a foaming cement, a preparation method and an application thereof. The foaming cement is mainly prepared from the following raw materials: cement, EPS grains, strong reducing agent sulphoaluminate, cellulose ether, mineral powder, glass beads, an external additive and water. The preparation method comprises the following steps: (A) mixing and stirring the cement, the mineralpowder, the glass beads, the strong reducing agent sulphoaluminate, the external additive and the water for 2-5min, and (B) adding the EPS grains and then stirring for 3-5min, thereby forming a sizing agent, feeding the sizing agent into a mold, pressing and molding for 2-3h, and de-molding. In the foaming cement according to the embodiment of the invention, the ingredients are reasonably designed, so that the performances are effectively promoted; the strong reducing agent sulphoaluminate and the cellulose ether co-act for adjusting the viscosity of the cement paste; and the glass beads areselected for enhancing the plasticity and liquidity of the slurry and the wrapping property of the slurry.

Description

technical field [0001] The invention relates to the field of cement processing and manufacturing, in particular to a foamed cement and its preparation method and application. Background technique [0002] Cement, powdery hydraulic inorganic gelling material. After adding water and stirring, it becomes a slurry, which can be hardened in the air or better hardened in water, and can firmly bind sand, stone and other materials together. The history of ce cement can be traced back to the Dadiwan people in Qin'an, China 5,000 years ago, who laid the ground similar to modern cement. A mixture of lime and volcanic ash, which was later used by the ancient Romans in construction, is very similar to modern lime pozzolanic cement. The concrete made of cemented crushed stone not only has high strength after hardening, but also can resist the erosion of fresh water or salt water. For a long time, as an important cementing material, it is widely used in civil engineering, water conserva...

AI Technical Summary

Problems solved by technology

[0003] At present, the main problems in the traditional production of lightweight and high-strength self-insulating blocks by using cement slurry to wrap polystyrene particles are as follows: 1. When the volume ratio of polyphenylene particles is relatively large, the pouring molding in the production process requires high fluidity of the mixture. There is a large difference in the specific gravity between the slurry and the particles, and segregation occurs during mixing, which leads to uneven distribution of the particles in the block; 2. The poor cohesion of ordinary cement paste cannot completely wrap the particles, resulting in poor block strength, thermal conductivity and flame retardancy ; 3. The strength of ordinary cement slurry wrapped particles develops slowly, and the long demoulding time affects production efficiency

4. In order to better wrap the particles, the volume ratio of the particles can only be reduced, resulting in an increase in the bulk density of the block and an increase in the thermal conductivity

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