片麻岩石粉及其复合掺合料对混凝土性能的影响

Effect of gneiss powder and its composite mineral addition on the performance of concrete

采用机制砂生产过程中产生的片麻岩石粉与粉煤灰、矿粉复合,研究片麻岩石粉及其复合矿物掺合料对混凝土工作性能、力学性能及长期耐久性能的影响。结果表明:掺片麻岩石粉会降低混凝土的工作性能和抗压强度,但片麻岩石粉复合掺合料对混凝土的工作性、力学性能和耐久性均有所改善,掺片麻岩石粉复合掺合料的混凝土,抗压强度与单掺粉煤灰相当,早期收缩减小,混凝土更致密。

Compound the gneiss powder produced in the process of sand production with fly ash and mineral slag, research the effect of gneiss powder and its composite mineral addition on the working performance,physical performance and long-term durability of concrete. The results show that it will reduce concrete working performance and compressive strength with gneiss powder, but gneiss powder with composite mineral addition can enhance the working performance,physical performance and durability of concrete. The compressive strength of concrete with gneiss powder composite mineral addition run close to the concrete with fly ash only, it also can reduce the early contraction of concrete and increase the density of concrete.