SUNFLOWER Aluminum Powder Paste

June 18, 2021

SUNFLOWER Aluminum Powder Paste

The main purpose of the aluminum powder paste for aerated concrete is that in the production process, the aluminum powder, silicon dioxide, and quicklime react chemically to release gas, so that the inside of the produced concrete block forms a porous structure. In the process of batching in the production of aerated concrete blocks, the aluminum powder paste is added to the aluminum powder slurry mixing tank, and after full mixing, it is put into the aluminum powder slurry metering scale, and finally mixed with quicklime, gypsum, fly ash, etc. The raw materials are put into the pouring mixer together. The aluminum powder in the aluminum powder paste can react with alkaline substances in the aerated concrete slurry to release hydrogen, generate bubbles, and expand the aerated concrete slurry to form a porous structure.
The general weight of aerated concrete blocks is 500-700kg/m3, which is only equivalent to 1/4 to 1/5 of clay bricks and 1/5 of ordinary concrete. It is a lighter type of concrete, which is more lightweight than ordinary brick concrete structures The weight of the carcass is reduced by more than 40%.

Aluminum powder paste can also make aerated concrete blocks have the following effects:
1. Sound insulation effect
Because of its unique porous structure, the internal structure is like bread, with a large number of closed pores evenly distributed, so it has a certain sound absorption capacity. A 10mm thick wall can reach 41 decibels.
2. Strong earthquake resistance
The aerated concrete block has light capacity, good overall performance, and low seismic inertia, so it has a certain seismic capacity.
3. Thermal insulation effect.
Because the aerated concrete block has a large number of pores and micropores inside, it has good thermal insulation performance. The thermal conductivity is 0.11-0.16W/MK, which is 1/4-1/5 of the clay brick. The thermal insulation effect of a 20cm-thick aerated concrete wall is equivalent to that of a 49cm-thick ordinary solid clay brick wall.
4. Impermeability effect.
Because the aerated concrete block is composed of many independent small pores, it absorbs water slowly and conducts moisture slowly. The time required for the same volume to absorb water to saturation is 5 times that of clay bricks. When used in the bathroom, the tiles can be directly pasted after the interface treatment on the wall.