Development of a Design Guide for Ultra Thin Whitetopping (UTW)

Concrete overlay of deteriorated asphalt pavements (whitetopping) has been a viable alternative for improving the structural integrity of pavement for over six decades. The thickness of such overlay usually exceeds six inches, however, a recent technology has emerged, known as Ultra-Thin Whitetopping (UTW). Ultra-Thin Whitetopping (UTW) is a construction technique, which relies on a strong bond between the asphalt layer and the concrete overlay. It involves placement of an concrete overlay with reduced thickness, ranging from 2 to 4 inches, the application of which has been targeted to restore or rehabilitate, deteriorated asphalt pavements with fatigue and/or rutting distress.