Comparative Study on Pavement Performance of Two Thin-Layer Overlay Structure

The paper comparatively analyzes pavement performance through two different gradation types mixture(AC-13,SMA-13),the result shows that the thin-layer overlay is a conservation measure of high performance,and combines well with the original road,but the effect of mixture overlay of different types gradation varies greatly.During designing the overlay,appropriate gradation type should be selected,and porosity should be controlled strictly in the construction.