Influencing factors of concrete slump loss-air content
Fresh concrete is a three-phase system consisting of liquid-solid-gas. Among them, air volume accounts for about 1%-3%. It exists in the form of spherical micro-bubbles and adsorbs on the surface of solid particles, which can play the role of "ball" or "bearing", reduce the friction between aggregates and increase the fluidity of concrete. If these bubbles are unstable in concrete, they will continue to escape from concrete, which will reduce the fluidity of concrete and increase the slump loss of concrete.
Influencing factors of concrete slump loss-construction environment
Temperature and humidity in construction environment are two main factors affecting concrete slump loss. When the temperature is too high in the environment, the hydration speed of cement becomes faster, the consistency of cement paste increases, and the slump loss of concrete increases. The smaller the relative humidity of the environment, the faster the evaporation of water, the smaller the slurry fluidity, and the greater the slump loss of concrete.
Choose the right concrete admixtures can improve the concrete workability and durability.
Shijiazhuang City Horizon Chemical Industry Co., Ltd. can provide concrete polycarboxylate superplasticizer and other additives used together with the concrete water reducer, like concrete retarder, defoamer, and accelerator, etc.