粉煤灰微珠掺量对透水混凝土的影响

The influence of fly ash microspheres on pervious concrete

本文研究了不同粉煤灰微珠掺量对透水混凝土工作性、透水系数、连续空隙率、抗压强度及劈裂抗拉强度的影响。通过单要素控制变量法研究发现:粉煤灰微珠掺量范围在20%~30%时,微珠对透水混凝土工作性及抗压性能的提升作用最为有效。粉煤灰微珠掺量为10%时,透水混土的连通空隙率有明显提高。透水系数与粉煤灰微珠掺量整体呈负相关联系。透水混凝土劈裂抗拉强度受“粉煤灰微珠”掺量的影响较小。

In this paper, the influence of different content of fly ash microspheres on the workability, permeability coefficient, continuous porosity, compressive strength and splitting tensile strength of pervious concrete is studied. Through the single factor control variable method, it is found that when the content of fly ash microspheres is 20%~30%, the microspheres are the most effective in improving the workability and compression resistance of pervious concrete. When the content of fly ash microspheres is 10%, the connected porosity of pervious concrete is obviously improved. The permeability coefficient is negatively related to the amount of fly ash microspheres. The splitting tensile strength of pervious concrete is less affected by the amount of fly ash microspheres.