A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Polyurethane asphalt binder: a promising candidate for steel bridge deck-paving material
To solve the problems of insufficient flexibility and low-temperature cracking resistance of epoxy asphalt binders in steel bridge deck-paving, a segmented linear polyurethane (PU) asphalt binder with thermoplasticity was synthesised via a chain extension reaction between a PU pre-polymer and chain extender in asphalt matrix. Successful synthesis was confirmed through Fourier transform infrared (FT-IR) spectroscopy. A series of tests were conducted to evaluate the properties of PU binders and determine an appropriate formulation. Asphalt binders with high PU contents (30–50%) perform significantly better than the base binder in terms of the high-temperature, low-temperature and mechanical properties. Further, the synthesised PU binder and other frequently used binders, e.g. epoxy and SBS-modified binders, in bridge deck asphalt pavements were compared. Results show that the synthesised PU binder has remarkably better flexibility and low-temperature property, but worse mechanical and high-temperature properties than an epoxy binder. However, the mechanical and high-temperature properties of the synthesised PU binder are substantially better than those of an SBS-modified binder. These results provide useful information for pavement engineers for selecting steel bridge deck-paving materials.
Polyurethane asphalt binder: a promising candidate for steel bridge deck-paving material
To solve the problems of insufficient flexibility and low-temperature cracking resistance of epoxy asphalt binders in steel bridge deck-paving, a segmented linear polyurethane (PU) asphalt binder with thermoplasticity was synthesised via a chain extension reaction between a PU pre-polymer and chain extender in asphalt matrix. Successful synthesis was confirmed through Fourier transform infrared (FT-IR) spectroscopy. A series of tests were conducted to evaluate the properties of PU binders and determine an appropriate formulation. Asphalt binders with high PU contents (30–50%) perform significantly better than the base binder in terms of the high-temperature, low-temperature and mechanical properties. Further, the synthesised PU binder and other frequently used binders, e.g. epoxy and SBS-modified binders, in bridge deck asphalt pavements were compared. Results show that the synthesised PU binder has remarkably better flexibility and low-temperature property, but worse mechanical and high-temperature properties than an epoxy binder. However, the mechanical and high-temperature properties of the synthesised PU binder are substantially better than those of an SBS-modified binder. These results provide useful information for pavement engineers for selecting steel bridge deck-paving materials.
Polyurethane asphalt binder: a promising candidate for steel bridge deck-paving material
Jia, Meng (author) / Sha, Aimin (author) / Lin, Jinghui (author) / Zhang, Zengping (author) / Qi, Bing (author) / Yuan, Dongdong (author)
International Journal of Pavement Engineering ; 23 ; 3920-3929
2022-09-19
10 pages
Article (Journal)
Electronic Resource
Unknown
MODIFIED ASPHALT BINDER AND ASPHALT BRIDGE DECK PAVING MIXTURE USING THE SAME
| European Patent Office | 2016
Paving method of steel bridge deck pouring type asphalt mixture
| European Patent Office | 2022
UHPC bridge deck transverse unequal-thickness asphalt paving construction process
| European Patent Office | 2021