Additives called admixtures may be used to accelerate the curing (hardening) process in low temperature conditions. Other admixtures trap air in the concrete or slow shrinkage and increase strength.

• 混凝土在低温状况下加入混合物可加速硬化程序,有的混合物可使空气留在混凝土中或使它慢慢缩小和增加强度。