Foam insulation material status and development prospects

Foam insulation material was first introduced in Germany in 1980. Through the foaming system of the foaming machine, the foaming agent is fully foamed mechanically, and the foam and the cement slurry are evenly mixed, and then the foaming machine pumping system is used for cast-in-place construction or mold forming, and the natural conservation site A new type of lightweight thermal insulation fireproof material containing a large number of closed pores is formed. It belongs to the bubble-shaped heat insulation material, which is characterized by the formation of closed foam holes in the interior of the concrete to make the concrete lightweight and thermal insulation.

Foam insulation material features:

1. Insulation: The thermal conductivity is 0.06-0.28W/(MK), and the thermal resistance is about 10-20 times that of ordinary concrete.

2. Lightweight: The dry bulk density is 300-1600KG/M3, equivalent to about 1/5~1/8 of common cement concrete, which can reduce the overall load of the building;

3. Integrality: It can be poured on site for construction, and it is tightly integrated with the main project, leaving no boundary gaps and vent pipes;

4. Low elastic shock absorption: The porosity of foamed cement makes it have a low elastic modulus, so that it has a good absorption and dispersion effect on the impact load;

5, sound insulation: foaming cement contains a large number of independent air bubbles, and the distribution is uniform, the sound absorption capacity of 0.09-0.19%, is 5 times that of ordinary concrete, with effective sound insulation function;

6, pressure resistance: compressive strength of 0.6-25.0MPA;

7. Water resistance: Cast-in-place foamed cement has less water absorption, relatively independent closed bubbles and good integrity, making it have a certain waterproof performance;

8, durability: the same as the main project life;

9, the construction is simple: just use the cement foaming machine can achieve automated operations, can achieve a vertical height of 200 meters long-distance transmission, the workload is 150-300M3 / working day;

10. Production and processability: Foamed cement can not only be produced into a variety of products in the factory, but also on-site construction, directly cast into roofs, floors and walls, and can be sawed, planed, nailed, drilled Holes and other processing;

11. Environmental protection: The required raw materials for foamed cement are cement and foaming agent. The foaming agent is neutral and does not contain harmful substances such as benzene and formaldehyde, thus avoiding environmental pollution and hidden fire hazards.

12. Fire resistance: Because the main raw material of foamed cement is cement, cement belongs to inorganic materials and is completely fireproof;

13, economic: low overall cost.

With the improvement of consumers’ awareness of energy-saving buildings and the country's policy guidance, whether the developers are willing or not, buildings must be made of exterior wall thermal insulation materials, which will bring consumers environmental protection, energy conservation, and thermal insulation. It will also promote environmental protection. External wall insulation material market.

At present, there are at least 13 billion square meters of buildings in China that need to be transformed into energy-saving facilities. Coupled with the growing trend of new buildings in China, the demand for external wall thermal insulation materials is even greater. This is undoubtedly a huge business opportunity for the special insulation, energy-saving and inorganic insulation material market.

Although China's new thermal insulation material composite foaming cement thermal insulation material application is not very perfect, but China's composite cement foam insulation material technology level is close to the developed countries, but it has not yet been widely popular because it is widely favored by the government and consumers. The performance of our composite foamed cement insulation products has reached the advanced level of similar foreign products. At present, there are nearly 100 manufacturers of composite foamed cement insulation materials in China, and the country annually produces 1.8 million cubic meters of composite foamed cement insulation materials. Composite foamed cement insulation material has obvious energy saving effect, stable performance, low material consumption, no dust hazard in the process of manufacture and use, and does not have the irritating effect on the environment like rock wool, glass fiber or expanded perlite, and expanded vermiculite bulk material. The disadvantages, and the use of high temperature, so in the low temperature insulation material market, composite foaming cement insulation material has obvious advantages. Because the raw materials used are mainly the research and development of foam and cement and its deep-processed products, it will be a promising field at home and abroad.

All along, 80% of the insulation materials in the insulation market in China have used flammable materials that have been restricted or banned in Europe and the United States. Because of these flammable insulation materials, Nanjing Zhonghuan International Plaza and Harbin Jingwei 360 Degree Gemini Star Building, Jinan Olympic Sports Center, Beijing CCTV New Affiliated Cultural Center, Shanghai Jiaozhou Teacher Affiliated Building, Shenyang Huangmao Wanxin Building, etc. have successively inflicted external thermal insulation materials on the building, resulting in serious casualties and property losses. The building flammable combustible external insulation materials have been Become a new type of fire hazard. With the publication of the No. 65 document of the Public Ministry of Public Security, the development of foam insulation materials has been greatly promoted.