隧道洞渣花岗岩机制砂中石粉含量对混凝土性能的影响

Influence of stone powder content in granite machine-made sand of tunnel slag on concrete performance

研究了隧道洞渣花岗岩机制砂中石粉含量对混凝土工作性、抗压强度、电通量的影响。结果表明,当隧道洞渣石粉含量从7.3%增加到18.6%时,混凝土拌合物的流动性降低,尤其是高强混凝土的拌合物黏度显著增大;花岗岩石粉含量超过11.4%时,3、28 d抗压强度有所提高,28 d混凝土电通量有所提高。

It studies the influence of the content of rock powder in the granite machine-made sand of the tunnel slag on the workability,compressive strength and electric flux of concrete.The results show that when the content of slag powder in the tunnel increases from 7.3%to 18.6%,the fluidity of the concrete mixture decreases,especially the viscosity of the high-strength concrete mixture increases significantly.When the content of granite powder exceeds 11.4%,the 3 d and 28 d compressive strength has increased,and the 28 d concrete electric flux has increased.