Analysis of Mechanical Properties of Cement Stabilized Macadam with Alkali Activated Recycled Aggregate
In order to improve the additional value of recycled aggregate from construction waste,the strengthening effect of different al-kali activators on the physical and mechanical properties of recycled aggregate was studied.Based on the principle of best performance,the best type and amount of alkali activators were selected,and the mechanical properties of cement stabilized crushed stone with alkali activated recycled aggregate were studied.The results show that the alkali activator can significantly improve the physical and mechani-cal indexes of recycled aggregate by improving the broken mortar layer and filling the pores and microcracks.Among them,the silicone resin is far superior to the silane coupling agent and water glass solution in reducing the crushing value,water absorption and improving the adhesion of recycled aggregate;The cement stabilized macadam mixed with alkali activated recycled aggregate shall not be lower than the cement stabilized macadam with pure natural aggregate,which can meet the minimum strength requirements of semi-rigid base in the specification.
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