Retrofit technique for asphalt concrete pavements after seismic damage

Reducing the risk of earthquake-induced damage to road is needed to promote safety and disaster mitigation and recovery. It is strongly needed for pavement performance to keep the emergency traffic remain in service despite severe earthquake. This paper presents a retrofit technique of asphalt pavements using Confined-Reinforced Earth (CRE) consisting of 1) compacted soil, 2) geosynthetics and 3) post-Tensioning anchors. Confining by the anchors is the application of both compressive and confining force to the compacted soil layers, and gives a pre-Tensile force to geosynthetics. The high flexural rigidity of CRE is for overcoming weakness of base course or subgrade in tension and flex/bending. In this paper, 1) structure of the retrofit technique of asphalt pavements using CRE, 2) construction method, 3) the results of full scale in-situ tests are presented.