In order to promote the application of limestone powder in highway cement-based materials,the setting time,rheological properties,strength and drying shrinkage of cement-based materials containing 0～30%waste limestone powder were tested,and the influence mechanism of limestone powder was analyzed.The results showed that the addition of limestone powder could delay the setting time,and reduce the shear stress and viscosity,thus improving the fluidity of the cement paste.However,the addition of limestone powder could increase the fluidity loss rate of the cement paste.The addition of less than 10%limestone powder could increase the strength of cement mortar significantly,but the addition of more than 10%limestone powder could reduce the strength of cement mortar.Moreover,the addition of limestone powder could add the drying shrinkage of cement mortar.
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