在坍落度为8～12cm的基体混凝土中,采用后添加方法加入流化剂,使混凝土的坍落度增大至18～22cm,以满足泵送混凝土工艺的要求,同时又不降低混凝土的质量,这是日本和许多工业发达国家混凝土技术发展的新方向。但是,在施工过程中,由于等候卸车,接长泵送管道等,流态混凝土坍落度会发生经时损 In the matrix concrete with a slump of 8 to 12 cm, the fluidizing agent is added by the post-addition method to increase the slump of the concrete to 18-22 cm, so as to meet the requirements of the pumping concrete process without reducing the concrete. Quality, this is a new direction for the development of concrete technology in Japan and many industrialized countries. However, in the construction process, due to the waiting for unloading, the long pumping pipe, etc., the slump of the fluid concrete will occur over time.