粉煤灰对高性能混凝土强度的影响

Influence of Fly Ash on Compressive Strength of HPC

摘要:

探讨了粉煤灰在高性能混凝土中的活性效应及作用机理。通过试验研究得出，当水胶比为０．３５以下时，在水泥砂浆中掺入３０％粉煤灰，其强度比可达到０．９５以上；在混凝土中掺入５０％粉煤灰，其抗压强度可达到６０ＭＰａ以上，可见粉煤灰在高性能混凝土中能发挥较好的活性效应。

Abstract:

Reactivity effect and its mechanisms of fly ash in high performance concrete (HPC) were studied. Results showed when m W/( m C+ m FA ) is lower than 0.35, the mortar with 30% by mass of fly ash in cementitious has the compressive strength ratio more than 0.95, and the concrete with 50% by mass of fly ash in cementitious has the compressive strength at 28 d more than 60 MPa. It was proved that fly ash displays better reactivity effect in HPC.