泵送砼工艺虽然具有一系列的优越性,但是由于在管道中输送,粗骨料与管内壁之间会产生较大的摩擦阻力,而且随输送距离的增长而加大,这样就限制了泵机的最大输送距离。此外,由于砼配合比的不恰当,还会使砼中的粗骨料起拱而造成管道堵塞,尤其是贫配合比砼。为解决管道堵塞问题,人们主要从提高砼可泵性方面来研究,如提高水泥用量,增大砂率,掺入外加剂等。但由 The pumping crucible process has a series of advantages, but due to the transportation in the pipeline, a large frictional resistance between the coarse aggregate and the inner wall of the pipe is generated, and it increases with the increase of the transmission distance, thus limiting the pump. The maximum conveying distance of the machine. In addition, due to the inappropriate proportion of lanthanum, the coarse aggregate in the ramming can also be arched and cause pipeline blockage, especially the lean ratio. In order to solve the problem of pipeline plugging, people mainly study the improvement of pumpability, such as increasing the amount of cement, increasing the sand rate, and adding additives. But by