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Laboratory investigation on the properties of polyurethane/unsaturated polyester resin modified bituminous mixture
Highlights The best formulation of PU/UPR modified bitumen was determined by tests. Some excellent properties of modified bituminous binder were presented. PU increases tensile strength and low-temperature performance of bitumen. Lab performances of PU/UPR and UPR modified bituminous mixtures were compared.
Abstract As a thermosetting material, unsaturated polyester resin (UPR) can effectively improve the high-temperature stability of bitumen. However, compared with epoxy modified bitumen, UPR modified bitumen has inferior low-temperature crack resistance. Therefore, this paper used polyurethane (PU) to modify UPR, and determined the best formulation of PU/UPR modified bitumen. The properties of PU/UPR modified bituminous binder were evaluated by viscosity, tensile, DSR and BBR tests. Besides, through a series of laboratory tests, the road performances of PU/UPR modified bituminous mixture were comprehensively studied. The results indicate that the PU/UPR modified bituminous binder has better tensile strength and low-temperature performance compared with the pure UPR modified bituminous binder, but the high-temperature stability was slightly worse. After PU addition, the flexural-tensile strength and fatigue resistance of the bituminous mixture were obviously improved, and the low-temperature performance improved slightly. The water stability and oil corrosion resistance almost remained unchanged, and the high-temperature performance was slightly decreased.
Laboratory investigation on the properties of polyurethane/unsaturated polyester resin modified bituminous mixture
Highlights The best formulation of PU/UPR modified bitumen was determined by tests. Some excellent properties of modified bituminous binder were presented. PU increases tensile strength and low-temperature performance of bitumen. Lab performances of PU/UPR and UPR modified bituminous mixtures were compared.
Abstract As a thermosetting material, unsaturated polyester resin (UPR) can effectively improve the high-temperature stability of bitumen. However, compared with epoxy modified bitumen, UPR modified bitumen has inferior low-temperature crack resistance. Therefore, this paper used polyurethane (PU) to modify UPR, and determined the best formulation of PU/UPR modified bitumen. The properties of PU/UPR modified bituminous binder were evaluated by viscosity, tensile, DSR and BBR tests. Besides, through a series of laboratory tests, the road performances of PU/UPR modified bituminous mixture were comprehensively studied. The results indicate that the PU/UPR modified bituminous binder has better tensile strength and low-temperature performance compared with the pure UPR modified bituminous binder, but the high-temperature stability was slightly worse. After PU addition, the flexural-tensile strength and fatigue resistance of the bituminous mixture were obviously improved, and the low-temperature performance improved slightly. The water stability and oil corrosion resistance almost remained unchanged, and the high-temperature performance was slightly decreased.
Laboratory investigation on the properties of polyurethane/unsaturated polyester resin modified bituminous mixture
Zhang, Hongliang (author) / Su, Ci (author) / Bu, Xinde (author) / Zhang, Yongping (author) / Gao, Yang (author) / Huang, Man (author)
2020-06-04
Article (Journal)
Electronic Resource
English
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