Analysis of Stress and Strain for Semi-Rigid Asphalt Pavement Based on Accelerated Loading Test

Abstract

Through the construction of cement stabilized macadam and lime-fly ash stabilized macadam road, and strain gauges, vertical stress sensors and temperature sensors were laid in the pavement during construction. Pavement structure dynamic stress, strain, deflection and pavement temperature were collected. The correlation between pavement temperature and structural dynamic response was analyzed. The results showed that, tensile strain of semi-rigid base layer was less affected by temperature; structural deflection was great affected by the thickness of semi-rigid base. After a certain number of repeated loads, the delay rate of tensile strain of semi-rigid base layer increased first and then slowly decreased.

Dynamic Strain Response of Hot-Recycled Asphalt Pavement under Dual-Axle Accelerated Loading Conditions

“…Although the fatigue cracking test used for the asphalt mixture layer adopts dynamic compression modulus correction at 20 • C, this test cannot truly reflect the dynamic characteristics of the pavement structure under loads and environmental conditions. Thus, it is necessary to systematically study the dynamic strain behavior characteristics of the asphalt pavement structural layer under the action of vehicle dynamic loads [5][6][7].…”