The invention discloses a lightweight
autoclaved aerated concrete block, and relates to the technical field of concrete blocks, the lightweight
autoclaved aerated concrete block comprises the following raw materials:
cement,
lime, a base material, modified
palygorskite,
calcium sulfate dihydrate, aluminum
powder paste, a foam stabilizer and deionized water; the modified
palygorskite is added, and a fibrous structure of the modified
palygorskite can form a network skeleton in
slurry, fill internal pores and block capillary channels, so that the overall structural compactness and the
surface strength of the building block are improved, and the
drying shrinkage rate and the water
absorption rate can be reduced; by adding the foam stabilizer,
sodium alkyl benzene sulfonate in the foam stabilizer can reduce the
surface tension of the
slurry and promote the generation of a large amount of bubbles; the
nano silicon dioxide can form a rigid supporting framework in a bubble liquid film, so that bubbles are prevented from being combined or broken; the
polyvinyl alcohol forms an elastic protective film on the surface of the bubble, so that the service life of the foam is prolonged, the closed
porosity of the building block is greatly improved, the lightweight characteristic of the building block is guaranteed, the
drying shrinkage rate is reduced due to the pore uniformity, and the impermeability and the overall strength are improved.