Study and Application of the Self-Compacting Recycled Pavement Concrete of High early Strength

Abstract

This paper aimed at the problem of how to rapid repair the military airfield pavement after it be demolished. It adopted the coagulate faster and early strength special cement, superplasticizer and mineral admixture, used the demolished pavement made recycled aggregates, optimized the mix proportion design and studied the performance of self-compacting recycled pavement concrete of high early strength. The laboratory tests and used in field both indicate that the workability of the self-compacting recycled concrete is well, could be constructed conveniently, the 4 hours’ flexural strength after it mixed could achieve more than 2.5MPa and ensure one type plane take off safely, which could fulfill the technique requirements of rapid repair the pavement. The flexural strength could achieve more than 5.5MPa at 28 days, and the recycled concrete felt with the existent pavement well, which could fulfill the long-term requirements of airfield pavement, the concrete also could be used in the rapid repair the cement concrete pavement of civil airfield and highway.