原文传递
Evaluation Criteria for Aged Asphalt Concrete Surfaces.
| 题名： | Evaluation Criteria for Aged Asphalt Concrete Surfaces. |
| 作者： | bell, h. p. freeman, r. b. |
| 关键词： | test and evaluation, shear properties, portable equipment, tensile strength, laboratory tests, army research, mixtures, core sampling, rheometers, seismology, landing fields, sampling, surfaces, concrete, fatigue life, predictions, dynamics, stiffness, te |
| 摘要： | An evaluation of aged asphalt concrete (AC) was performed during the period February to December 2006 at the Vicksburg Airport (Vicksburg, MS), Hood Army Airfield and Robert Gray Army Airfield (Fort Hood, TX), Lawson Army Airfield (Fort Benning, GA), Cairns Army Airfield (Fort Rucker, AL), Butts Army Airfield (Fort Carson, CO), and Kandahar Airfield (Kandahar, Afghanistan) to develop a method for predicting the performance of aged AC surfaces in situ. A portable seismic pavement analyzer (PSPA) was used on the in situ AC pavements to determine the pavement modulus. The aged AC samples obtained from the military airfields were brought to the U.S. Army Engineer Research and Development Center for further laboratory testing. Various asphalt mixture and binder properties were determined from the samples, indirect tensile strength tests were run on core samples, and beam fatigue tests were performed on beam samples. The results from this study were used to develop adjustments to the current Department of Defense (DoD) fatigue criterion for the purpose of improving fatigue life predictions for aged AC surfaces. Aged AC surfaces are considered to be 10 years old or older. The most accurate adjustment to the current DoD criterion required both asphalt modulus (from PSPA) and binder stiffness (from dynamic shear rheometer) as input. / NOTE: Final rept. / Supplementary Notes: The original document contains color images. / Availability Note: Product reproduced from digital image. Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA. |
| 总页数： | u0725；73p |
| 报告类型： | 科技报告 |
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