Abstract
Polyether Polyurethane Concrete (PPC) is a new engineering material used for bridge deck pavement. In this paper, the aging resistance performance of PPC for long-term service is evaluated. Based on the actual climate and environment conditions of bridge deck pavement, the indoor laboratory simulation considering various environmental factors was first proposed, and then the indoor accelerated aging tests of PPC were carried out. Finally, the Cantabro test, the low temperature bending beam test, the rutting test, the splitting test under freeze-thaw cycle and four point bending fatigue test were conducted on the aged PPC specimens. The performances of anti-loose, resistance to permanent deformation, low temperature, water stability and fatigue resistance were evaluated and compared with SBS modified asphalt mixture (SBSM). Test results showed that PPC had good anti-aging performance, and the road performance of PPC after aging was still better than that of non-aging SBSM, which can be used for the long-term service as a bridge deck pavement material.
Highlights
As an important part of bridge, the durability of bridge deck pavement is always a hot topic in the field of transportation infrastructure engineering (Wang and Liu, 2013; Sun and Chen, 2014; Geng et al, 2016; Qian et al, 2016; Hee et al, 2017; Zhang et al, 2018)
It was concluded that UV light and heat exhibit significant coupling effect, which was more significant than the effect of single thermo-oxidative aging on the low-temperature performance of Polyether polyurethane concrete (PPC), and UV light had a greater impact on low-temperature performance of PPC than the high temperature of the road surface during the service life
UV light can irradiate into the internal microstructure of the material, and long-term irradiation causes large amounts of the chemical bonds break in polyurethane, and the free radicals gradually solidify, resulting in the increasing in the material rigidity and decreasing in flexibility at low temperature
Summary
As an important part of bridge, the durability of bridge deck pavement is always a hot topic in the field of transportation infrastructure engineering (Wang and Liu, 2013; Sun and Chen, 2014; Geng et al, 2016; Qian et al, 2016; Hee et al, 2017; Zhang et al, 2018). Polyurethane polymer has good flexibility and elasticity suitable for service with long-term dynamic deflection It has good mechanical properties, wide adhesion applicability, Evaluation of PPC Aging and low temperature sensitivity and can replace the asphalt materials to achieve the long-term service life of bridge deck pavement. Wang et al (2018) developed the PPC as the bridge deck pavement material, evaluated its road performance, and proposed that the residual splitting strength under freeze–thaw cycles should be used as the water stability index of PPC They found that the dynamic stability and low-temperature bending tensile strain of PPC were nearly 10 times higher than asphalt mixture, and the fatigue life was more than 1 million times.
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