Public financial construction of super lightweight foam concrete characteristics

1, saving energy source environmental protection foam concrete raw materials for cement, unlike polystyrene plastic extrusion plate, such as energy as raw material, and can use large amount of industrial waste residue.Cement production, although there are energy, but compared to the polystyrene foam and other organic insulation material production has been reduced a lot.In addition, foam concrete using inorganic materials as the main body, production without harmful substances produced, the production site without peculiar smell.In the application process will not produce decomposition, green environmental protection.The raw material of foaming agent for neutral, benzene, formaldehyde and other harmful substances, avoiding environmental pollution and fire hazard.From the perspective of green architecture, also should be the best choice for building insulation.2, lightweight foam concrete density, density grade is 300-1800kg/m3, commonly used in the foam concrete density rating of 300-1200kg/m3, in recent years, density of 160kg/m3 ultra light foam concrete in construction engineering was applied.As the foam concrete density, in both inside and outside the building, floor, wall, column dimensions in building structures such as the materials, the general can make the structure weight is reduced by about 25%, some up to structure weight 30%-40%.The foam concrete wall and roof materials in reducing the self weight of buildings at the same time, to increase the floor height, realize the construction of high-rise, thereby saving building area.At the same time, it can reduce the pressure on the ground buildings, reducing the building foundation, beam, column structure, can save building materials and engineering cost, greatly reduce the engineering amount, shorten time limit for a project, have remarkable economic benefits.3, good insulation properties as the foam concrete containing large closed small pores, so it has good thermal performance, namely, good insulation performance, which is not possessed by common concrete.Usually dry bulk density is 400 ～ 700kg/m3 foam concrete its thermal conductivity is usually 0.09 ～ 0.17W/ (m · K),

insulation for clay brick for 7 times, 10 times that of ordinary concrete.Practice has proved, in the northern regions of China 20cm thick foam concrete wall, the insulation effect and 49cm clay brick wall quite.Under the same heating condition, foam concrete building indoor temperature than the traditional clay brick houses can be increased by 5 ℃.In hot regions, and can greatly reduce the summer air conditioning starting frequency, to reduce electricity consumption, can effectively reduce the cost of living.Foamed concrete is our country at present all kinds of wall materials, without adding other insulating material or air layer, can achieve energy saving 65% preferred the new energy-saving wall materials.Table 1-1 foam concrete and several commonly used building material heat conductivity comparison.4, good fireproof performance of foam concrete cement as main material, inorganic material, in order to fully burning material.Fire resistance limit greater than 2h, can reach a standard.So it has good fire resistance,

 in buildings, can improve the fireproof performance.Another advantage is, we have R & D cast-in-place concrete foam insulation wall of steel structure, can be completely coated in the foam concrete, the steel structure protection, even fire, steel structure deformation is not easy to collapse, this also to a certain extent, solve the problems of steel structure fire protection, can play a double the role of fire.5, seismic performance foundation load is small, the seismic force is more powerful.Foundation load and wall materials wall materials directly related to density, density is small, the foundation of the building load is smaller, because, wall material weight to account for building 70% weight.