主要研究软水渗透溶蚀作用下水工碾压混凝土的渗透特性，即水工碾压混凝土渗透系数随渗透历时延长的变化及其原因。通过水泥净浆、水泥砂浆、不同粉煤灰掺量和不同外加剂掺量的水工碾压混凝土的渗透试验，得出影响混凝土渗透性能最重要的因素是混凝土的密实性。碾压混凝土本体在软水渗透溶蚀作用下，混凝土渗透溶蚀程度有限，不会导致混凝土抗渗性下降，可以直接用作坝体上游面防渗。

The permeability performance, that is, the permeability coefficient varied with time of hydraulic roller compasted conerete (RCC) under soft water leakage dissolution was investigated by permeability test with hydrated cement paste, mortar and RCC with different contents of fly ash or additives. The most important factor affecting the permeability performance of hydraulic RCC is its compactness and pore structure. The permeability coefficient of hydraulic RCC under soft water leakage dissolution does not descend because of limited dissolution. So RCC can act as upstream waterproof concrete .