APPLICATION OF RESIN WATERPROOF INTEGRATED ASPHALT PAVEMENT ON UNEVEN SFRC PAVEMENT

Abstract

 On the Hanshin Expressway, steel fiber reinforced concrete (SFRC) pavement is used on existing steel deck slabs as a measure against fatigue. During repairs of the surface layer pavement situated above the SFRC pavement, there is a possibility that the SFRC pavement could be partially cut by a cutting machine, which might cause fiber protrusion from the SFRC pavement. Although a waterproof layer is installed to ensure the durability of the SFRC pavement, the unevenness caused by cutting and the fiber protrusion can lead to a decrease in the waterproof performance of the waterproof layer on the SFRC pavement surface. To address this issue, this study aims to ensure waterproof performance on SFRC pavement with fiber protrusion without removing the fibers by applying a resin-based waterproof asphalt pavement that can form a water-impermeable layer integrated with the base layer. Experimental investigations confirmed that this method offers sufficient performance compared to conventional heated asphalt coating waterproofing.