砌块高层建筑注芯用高效能砼的研究（续）陈思义，鲍三中，廉慧珍（清华大学土木系）④膨胀剂掺量的确定砼的收缩与其拌和用水量关系很大，随着用水量的增加，砼的流动性增加，与之相应，砼的后期收缩将随着加大。另外，由于注芯用ＨＰＣ配合比中砂率的增加，粗骨料含；量... Research on high-performance enthalpy for core injection of block high-rise buildings (Continued) Chen Siyi, Bao Sanzhong, Lian Huizhen (Department of Civil Engineering, Tsinghua University) 4 Determination of the amount of expanding agent The shrinkage of ytterbium has a great relationship with its mixing water consumption, As the amount of water increases, the mobility of helium increases, and accordingly, the late contraction of helium will increase. In addition, due to the increase in the sand ratio of the HPC compounding core, the coarse aggregate contains the amount of...