The results show that a proper air-entrainingagent to be added not only can increase strength of cement polystyrene board effectively, but also decrease its density.
结果表明:适量引气剂的加入不仅可有效提高水泥聚苯板强度,还可降低密度;
3
At present, excessive pumping concrete, pumping concrete in order to ensure the availability of pumps, pumping concrete, often adding an appropriate amount of air-entrainingagent.