原文传递
Comparison of Performances of Structural Fibers and Development of a Specification for Using Them in Thin Concrete Overlays.
| 题名： | Comparison of Performances of Structural Fibers and Development of a Specification for Using Them in Thin Concrete Overlays. |
| 作者： | Barman, M.; Hansen, B. |
| 关键词： | Fiber reinforced concrete, Overlays (Pavements), Residual Strength Ratio (RSR), Pavements, Cracking of concrete pavements, Pavement joints, Performances, Structural, Load Transfer Efficiency (LTE), Slab thickness |
| 摘要： | Structural fibers improve the long-term performance of concrete pavements and overlays and potentially are useful to reduce the slab thickness. These fibers are available in different parent material compositions, stiffness, shapes, and aspect ratios. The main objective of this study was to characterize the post-crack flexural and joint performance of fiber reinforced concrete to develop a specification for the selection of structural fibers for concrete overlays and/or pavements. The study included a literature review, an online survey, and a large-scale laboratory testing. It was found that the majority (almost 94%) of the FRC overlays in this country were constructed with structural synthetic fibers, which provided equal or better performance than projects using the steel fibers. In the laboratory study, a total of 43 different mixes were prepared with 11 different types of fibers. Fiber dosage, stiffness, and geometry significantly influenced the residual strength ratio (RSR) and residual strength (RS). In general, embossed, twisted, and crimped fibers performed better on average than straight-flat synthetic fibers when the comparison was made in terms of RSR or RS. From the joint performance testing, it was found that fibers can greatly improve the performance of the pavement with respect to load transfer efficiency (LTE), differential displacement, and differential joint energy dissipation. The findings from this were used to recommend the target ranges post-crack flexural performance, and joint performance parameters. |
| 报告类型： | 科技报告 |
相关文献
- APPLICABILITY OF NEW FLEXIBLE PAVEMENT SMOOTHNESS SPECIFICATION FOR ASPHALT OVERLAYS.
- GRANULAR OVERLAYS ON LOW-VOLUME ROADS IN WASHINGTON STATE: STRUCTURAL AND PERFORMANCE CHARACTERISTICS.
- Cracking and Debonding of a Thin Fiber Reinforced Concrete Overlay
- Asphalt Concrete Overlays on Continuously Reinforced Concrete Pavements: Decision Criteria, Tack Coat Evaluation, and Asphalt Concrete Mixture Evaluation. Technical rept. (9/2002-8/2003).
- Recycled and Virgin Plastics in Fiber Reinforced Concrete; Final rept. Oct 94-Aug 97
- PAVEMENT MAINTENANCE EFFECTIVENESS.
检索历史
应用推荐
