The effect of limestone fineness on the basic mechanical properties of limestone powder-fly ash-slag concrete was mainly studied under the condition of fixed cementitious material doping,and microstructural analysis was carried out by scanning electron microscopy(SEM)and X-ray diffraction(XRD).Studies have shown that when the amount of limestone powder is 20%,it is mainly dilution effect,and the strength is reduced more.The compressive strength and split tensile strength of concrete increase with the increase of the specific surface area of limestone powder,and the fineness of limestone powder has no significant impact on the flexural strength.The fineness of limestone powder increases,the filling effect is better,and the internal structure of the concrete is more solid.
关键词
石灰石粉细度/混凝土/基本力学性能/微观结构
Key words
fineness of limestone powder/concrete/basic mechanical properties/microstructure
万方数据