01661503

Component

This study aims to study interface shear strength between porous polyurethane mixture and asphalt mixture with different adhesive materials. The purpose is to illustrate the necessity of applying adhesive materials between porous polyurethane mixture and asphalt sublayer. Polyurethane, epoxy resin, and SBS modified asphalt were selected as adhesive materials to fabricate composite specimens. Interface shear strength of composite specimen was measured using inclined shear test at different temperatures and freezing-thaw conditions. The shear fatigue life of composite specimen with different adhesive materials was also investigated. The results indicated: it is necessary to set adhesive material between Porous Polyurethane Mixture and asphalt mixture since its interface shear strength (without adhesive material) was smaller than the shear strength produced by two layers of asphalt concretes; The epoxy resin had better performance of shearing resistance than SBS modified asphalt and polyurethane at 25?, but the three adhesive materials have the similar shear strength at both -18? and 60?; After the freeze-thaw cycle, the shear strength of all the specimens decreased, and this reduction of SBS modified asphalt was the minimum; As for the inclined shear fatigue test, the epoxy resin had the longest fatigue life and SBS modified asphalt was the lowest.

This paper was sponsored by TRB committee AFK40 Standing Committee on Surface Requirements of Asphalt Mixtures.

18-03833

English

4p

2018

Transportation Research Board 97th Annual Meeting

Digital/other

Figures; Tables

Adhesive strength; Asphalt mixtures; Composite materials; Pavement layers; Polyurethane resins; Porous materials; Shear strength

Highways; Materials; Pavements

Transportation Research Board Annual Meeting 2018 Paper #18-03833

TRIS, TRB, ATRI

Jan 8 2018 10:57AM