AAC Block

AAC Block Introduction

Autoclaved aerated concrete block (AAC) is made from silicon material (silica sand, or recycled fly ash and silica gangue) and calcium material (lime, cement), mixing with foaming additive (aluminum powder), batching with water, the reaction between aluminum and concrete causes microscopic hydrogen bubbles to form, expanding the concrete to about five times its original volume. It is made into the multi-cells silicate products by the processes of resting, tilting, cutting and autoclaving.

AAC Block characteristics

Foam concrete is usually mechanically prepared aqueous solution of the foam bubbles, and then added to the foam material containing silica, calcium materials, water and various additives and other components of the slurry, after mixing, casting molding, conservation made of a porous material. Since foam concrete contains a large number of closed pores, it has the following excellent physical and mechanical properties.

Good thermal insulation performance
Since foam concrete contains a large number of small closed pores, so it has good thermal performance, the good insulation properties, it is not available in ordinary concrete. 300-1200 kg/m3 density levels are usually in the range of foam concrete, thermal conductivity in the 0.08-0.3w / (m • K) between the thermal resistance of about 10-20 times that of ordinary concrete. Use of foam concrete as a building wall and roof materials, has a good energy saving effect.

Good insulation fire resistance
Foam concrete is a porous material; it is also a good sound insulation material. Floors in buildings and highway noise barriers, etc. can be used underground to the top of the building materials as insulation layer.Foam concrete is inorganic material, will not burn, which has good fire resistance, the use of the building, can improve the fire performance of buildings.

low elasticity and good damping
Porous foam to the concrete with a low elastic modulus, so that it has a good impact load absorption and dispersion.

Good environmental performance

The raw material of Foam concrete is cement and foam additive. The foam additive is close to neutral, without benzene, formaldehyde and other harmful substances, then avoid environmental pollution and fire hazard.

Good durability
Same life with the main project.

Strong water resistance
Compared with cast foam concrete which has the low water absorption, Foam concrete with the relatively independent of the entrapped air and good integrity, it has a certain degree of water resistance.