预拌泵送混凝土由于坍落度大、砂率大、石子粒径偏小,在终凝前后容易产生较大裂纹,本文从实际出发,提出了防止裂缝的几种有效措施及施工注意要点。 Premixed pumping concrete has large slump, large sand rate, and small stone particle size. It is easy to generate large cracks before and after the final set. This article puts forward several effective measures to prevent cracks and points for construction attention.