The development prospect of foam concrete

Foamed concrete has been widely used as an insulation layer in low temperature floor radiation heating, but from the whole construction market, it accounts for a small proportion.

 According to its good thermal insulation and other unique performance, it should play a greater role in the building energy conservation

.(1) Further improvement of the equipment can further expand its application field. At present, the most widely used is the floor insulation. In the near future, its application field will be extended to the external insulation of the ground, roof and external wall, and can also be directly used for pouring the partition wall.

(2) Choose and develop some new additives to change the performance of foaming cement.1. Modifier: change its fluidity, anti-pituitary, to meet the needs of different places.2, waterproof agent: especially in the roof insulation, increase the impermeability, but also improve the performance and price ratio.3, engineering fiber: small engineering fiber added to the foam concrete, can significantly improve the performance of foam concrete, increase the crack resistance, impermeability.4,

 Characteristic materials: (1) cement: With the progress of the production technology level of the cement industry, the average grade of cement is also greatly improved. In the 1960s, the average strength of concrete in the United States was 28 MPa, and in the 1970s, it reached 42 MPa. In 2000, the strength of 70 MPa has been regarded as ordinary concrete. In China, the 1990s no. 275 low grade cement has been eliminated, according to the national standard "Portland cement, ordinary Portland cement", (GB175-1999), Portland cement is divided into 425R, 525,52525 R, 625,625R, 725R six labels, ordinary acid cement is divided into 325,425,425R, 525,525,525R, 625,625 R seven labels. The promotion and application of higher grade cement has played a key role in improving the quality of foaming cement. For example, the foaming cement products made with cement labeled 525, in the capacity of less than 300 kg/m3, the compressive strength can reach more than 4MPa, its excellent performance can be seen.

(2) Other fillers: according to different needs, fill with sand, slag, thermal insulation particles, and even straw and other materials, to achieve different performance, to meet different needs. In short, as a kind of light quality, high strength, thermal insulation, waterproof and other excellent performance of energy-saving products, foam cement will be recognized by more and more people. It can be predicted that the application field of foam cement will be able to expand in the direction of high strength, composite and energy saving.