粉煤灰是以煤做燃料的火力发电厂排出的一种工业废渣。目前，我国对粉煤灰的利用率较低，大量被废弃的粉煤灰占压土地，污染环境，成为一大公害。因此，国家对粉煤灰的综合利用非常重视。我国水电建设中，大坝砼掺用粉煤灰已有较成熟的经验，但是在制砖、防渗墙等方面相对... Fly ash is a kind of industrial waste discharged from coal-fired thermal power plant. At present, the utilization rate of fly ash in our country is relatively low, a large amount of abandoned fly ash occupies land and pollutes the environment, becoming a major public hazard. Therefore, the state attaches great importance to the comprehensive utilization of fly ash. In China’s hydropower construction, dam concrete admixture with fly ash has more mature experience, but in the brick, cut-off walls, etc. relative ...