The solid phase volume of ordinary portland cement increases during hydration and hardening, while the cement + water system shrinks. Secondly, the cement hydration process is accompanied by thermal effects, which cause the initial volume to expand and sh
Foam concrete is prepared by adding uniformly prepared and stable foam to the pre-prepared slurry and forming and curing the cement-based porous material. Therefore, general foam concrete is made by physical foaming. Physical foaming refers to the use of
Foaming agent refers to all surface-active substances whose solutions can produce a large amount of foam through physical methods (stirring, compressed air, etc.) or chemical reactions under specific conditions. Foaming agent has high surface activity, ca
At present, a lightweight wall panel has been tried and applied in many high-rise construction projects because the thin wall panel is a new type of wall material. The lightweight wall panel material is flexible and lightweight, which can increase the usa
The workability of concrete refers to the ease of construction operation (mixing, transportation, pouring, tamping) of the concrete mixture and the performance of small molding, uniform quality, no segregation, and no bleeding.
Physical foaming refers to mechanical foaming. Air is introduced during full stirring or shearing by machinery, and the sky is wrapped with a surfactant or an aqueous solution of a surface-active substance. In the physical foaming process, to prevent the