At present,due to the different sources and uneven quality of recycled aggregates,the performance of RAPC is severely restricted,and the popularization and application of RAPC pavement is limited.To solve this prob-lem,four kinds of waste concrete with different strength grades were used to prepare recycled aggregates,and recycled aggregates from different sources were used to prepare recycled aggregate permeable concrete,and the influence of ag-gregate sources on the compressive strength and dispersion of compressive strength of RAPC was studied.The results show that:the higher the strength grade of native concrete,the better the basic physical properties of recycled aggre-gate,showing higher apparent density and close packing density,lower water absorption and crushing index;the strength of native concrete is related to the RAPC resistance.The compressive strength is positively correlated,and the compressive strength of RAPC can be increased by about 10％for every 10 MPa increase in the strength of the original concrete;the discreteness of the compressive strength of RAPC prepared from recycled aggregates with determined sources is much lower than that of recycled bone produced by construction waste crushing plants RAPC prepared with raw materials,and the higher the strength of the original concrete,the better the discreteness of the compressive strength of RAPC.Therefore,when recycling recycled concrete aggregate,it is necessary to classify and recycle accord-ing to its strength level to maximize the performance of RAPC.
万方数据
维普
