A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Study on the micro-mechanism and structure of unsaturated polyester resin modified concrete for bridge deck pavement
Highlights Unsaturated polyester resin (UPR) as a modifier in bridge deck pavement concrete was investigated. UPR decreased the exothermic rate and the cumulative hydration heat in terms of cement hydration. UPR refined the pore structure inside the deck pavement concrete. UPR effectively postponed crack initiation and restrained the propagation of crack in the solidification process of concrete. UPR promoted densification and homogenization and narrowed the area range with regarding to interface transition zone (ITZ).
Abstract To solve the problems of durability reduction and service-life shortening of bridge deck pavement concrete, this study investigated the effect of unsaturated polyester resin (UPR) as a modifier on the cement hydration and the microstructure morphology of pore, crack and interface transition zone (ITZ) of cement concrete. The enhancement mechanism of UPR incorporation into bridge deck pavement concrete was determined with the aid of meso- and micro-structure analysis technology and digital image processing approach. The results indicated that the incorporation of UPR-emulsion might have a significant retarding effect on the cement hydration process while greatly enhanced the compactness and anti-permeability of the concrete. In addition, the addition of UPR emulsion could effectively delay crack initiation and restrain the propagation of crack during consolidation process, and reduce the zone area and materialize intense densification and homogenization in terms of ITZ. In comprehensive consideration of the characteristics of pore structure and micro-crack, the introduction of 3% UPR-emulsion could be recommended to achieve the performance reinforcement of deck pavement concrete to a certain degree.
Study on the micro-mechanism and structure of unsaturated polyester resin modified concrete for bridge deck pavement
Highlights Unsaturated polyester resin (UPR) as a modifier in bridge deck pavement concrete was investigated. UPR decreased the exothermic rate and the cumulative hydration heat in terms of cement hydration. UPR refined the pore structure inside the deck pavement concrete. UPR effectively postponed crack initiation and restrained the propagation of crack in the solidification process of concrete. UPR promoted densification and homogenization and narrowed the area range with regarding to interface transition zone (ITZ).
Abstract To solve the problems of durability reduction and service-life shortening of bridge deck pavement concrete, this study investigated the effect of unsaturated polyester resin (UPR) as a modifier on the cement hydration and the microstructure morphology of pore, crack and interface transition zone (ITZ) of cement concrete. The enhancement mechanism of UPR incorporation into bridge deck pavement concrete was determined with the aid of meso- and micro-structure analysis technology and digital image processing approach. The results indicated that the incorporation of UPR-emulsion might have a significant retarding effect on the cement hydration process while greatly enhanced the compactness and anti-permeability of the concrete. In addition, the addition of UPR emulsion could effectively delay crack initiation and restrain the propagation of crack during consolidation process, and reduce the zone area and materialize intense densification and homogenization in terms of ITZ. In comprehensive consideration of the characteristics of pore structure and micro-crack, the introduction of 3% UPR-emulsion could be recommended to achieve the performance reinforcement of deck pavement concrete to a certain degree.
Study on the micro-mechanism and structure of unsaturated polyester resin modified concrete for bridge deck pavement
Zhang, Zhen (author) / Zhang, Hongliang (author) / Liu, Tong (author) / Lv, Wenjiang (author)
2021-03-23
Article (Journal)
Electronic Resource
English
| Taylor & Francis Verlag | 2022
| British Library Online Contents | 2018
| British Library Online Contents | 2018