False coagulation is mainly caused by lack of water in concrete. In a certain process, when the water content in concrete is less than the total water required by normal condensation, false coagulation phenomenon may occur. The influence of water content is related to the water demand of cement hydration reaction, the evaporation of water from concrete caused by environmental factors and the drainage of structure after vibration, and the appearance of false coagulation is often accompanied by cracks.
Water is the concrete after pouring and vibrating mixture in the process of setting and hardening, along with granular materials of sinking a local signs of mixing water buoyancy to the concrete surface, after concrete pouring and tamping before initial setting, under the gravity of the aggregate, liquidity good slurry floatation, local moisture to evaporate to rise to the concrete surface, secrete water, At the same time, the floating slurry layer is displayed. In contrast to false coagulation, when the water content in concrete is greater than the total water required for normal coagulation, the phenomenon of bleeding may occur.
