The adaptability of water reducer to temperature

When the temperature is very low, the fluidity loss of fresh concrete is also exacerbated. The test results of polycarboxylate for temperature adaptability show that when the temperature is higher than 20 degrees in the greenhouse, the loss of concrete increases slightly, the dispersibility improves slightly, and the dispersibility decreases slightly at low temperature, but the fluidity retention ability is stable. Both slump and expansion of concrete increase, and when the temperature is lower than 0 degrees, the fluidity of concrete increases more greatly. As the temperature rises, the water-reducing performance of the polycarboxylate-mixed concrete improves. When the temperature is higher than 20 degrees, the water-reducing performance of the concrete tends to be stable, but the slump retention capacity decreases slightly, and the expansion degree is no longer at this time. Increase, sometimes there is a slight decrease, but in general, polycarboxylic acid is basically suitable for low temperature in winter or high temperature in summer, and the slump retention performance of concrete is very good. In particular, it is not necessary to use retardation methods to maintain concrete slump. This is very beneficial for concrete construction.