Study of Mechanical Properties and Water Damage Behavior of Steel Slag Powder-cement Stabilized Macadam Base Material
The feasibility of producing cement stabilized macadam with steel slag powder was dis-cussed.Steel slag powder-cement stabilized macadam samples were prepared,and their mechanical properties,hydration products,microstructure and water damage behavior were studied.The results show that when the content of steel slag powder does not exceed 30％of the total cementitious materi-al,the 7-day unconfined compressive strength of the sample exceeds 4 MPa,which meets the require-ments of engineering application.When the content of steel slag powder increased,the drying shrink-age coefficient of the sample decreased by 32％at 12 days,and the addition of steel slag powder inhibi-ted the drying shrinkage.The main hydration products in the mixture are hydrated calcium silicate and ettringite.The addition of steel slag powder makes the internal structure of the sample more loose,which is beneficial to the infiltration of water and makes the sample produce pores after water damage.
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