原文传递
Permanent Deformation in Flexible Pavements with Unbound Base Courses.
| 题名： | Permanent Deformation in Flexible Pavements with Unbound Base Courses. |
| 作者： | Huurman-Rien; Molenaar-Andr+_-A-A |
| 关键词： | Asphalt-pavements; Base-course-Pavements; Cement-; Compressive-strength; Cost-effectiveness; Deflection-; Falling-weight-deflectometers; Full-depth-reclamation; Georgia-; Pavement-performance; Recycle |
| 摘要： | The Georgia Department of Transportation (GDOT) has obtained favorable results from the initial use of cement-stabilized reclaimed base (CSRB) in a pilot full-depth reclamation (FDR) in rural southeast Georgia. CSRB is produced when portland cement is added to sand-clay base from an FDR, and it is used to underlie hot-mix asphalt. GDOT initiated its first FDR in 2004 on County Road (CR) 52 in Long County. A 4.8-km corridor of CR 52 was overlain with a 12.5-mm Superpave-?mix, including a 1.8-km section reconstructed with FDR. Samples of the in situ sand-clay base and pavement were obtained for a mix design to determine if these materials would react satisfactorily with portland cement. With the same laboratory design strength requirement for a soil-cement base, the desired level of unconfined compressive strength was obtained at 6% cement. A provisional specification for CSRB was developed, and a 152-m trial section of 12.5-mm mix over CSRB was constructed in July 2004. Construction procedures were adjusted after the trial section was placed, and the remainder of the FDR and overlay was completed. Construction costs for the 1.8-km FDR section were reduced 42% using FDR. Falling weight deflectometer readings taken after construction indicated that deflections were significantly lower in the FDR section than in the overlay-only section. The road is performing well after nearly 1 year of use. GDOT is considering development of a permanent specification for CSRB on non-state routes. |
| 总页数： | Transportation Research Record: Journal of the Transportation Research Board. 2006. (1952) pp125-133 (1 Phot., 6 Fig., 2 Tab., 9 Ref.) |
| 报告类型： | 科技报告 |
相关文献
- Selection of Optimum Gravel Aggregate Size to Resist Permanent Deformation in Hot-Mix Asphalt.
- Pavement Management 2013, Volume 4. Transportation Research Record: Journal of the Transportation Research Board, No. 2369.
- PERMANENT DEFORMATION OF A GRANULAR BASE MATERIAL.
- Long-Term Pavement Performance. Protocol P46: Resilient Modulus of Unbound Granular Base/Subbase Materials and Subgrade Soils.
- Recommendations for Stabilization of High-Sulfate Soils in Texas.
- Geosynthetic Reinforcement of Flexible Pavements: Laboratory Based Pavement Test Sections; Final rept. 1 Oct 96-22 Feb 99
检索历史
应用推荐
