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LOW-TEMPERATURE CRACKING: TEST SELECTION.
| 题名： | LOW-TEMPERATURE CRACKING: TEST SELECTION. |
| 作者： | Jung-DH; Vinson-TS |
| 关键词： | ASPHALT-CONCRETE; ASPHALT-; COLD-REGIONS; CRACKING-; LOW-TEMPERATURE-TESTS; PAVEMENTS-; THERMAL-FRACTURE; THERMAL-STRESS-RESTRAINED-SPECIMEN-TEST; STRATEGIC-HIGHWAY-RESEARCH-PROGRAM |
| 摘要： | This report describes the thermal stress restrained specimen test (TSRST), which was selected to evaluate the low-temperature cracking resistance of asphalt concrete mixtures. The TSRST system includes a load frame, step-motor-driven load ram, data acquisition hardware and software, temperature controller, and specimen alignment stand. The overall system is controlled by a personal computer. TSRST is conducted by cooling an asphalt concrete specimen at a specified rate while maintaining the specimen at constant length. A typical thermally induced stress curve obtained in TSRST is divided into two parts: relaxation and nonrelaxation. The temperature at which the curve is divided into two parts is termed the transition temperature. The temperature at fracture is termed the fracture temperature, and the maximum stress is the fracture strength. An experiment design that considered a range of mixture and test condition variables was developed to evaluate the suitability of TSRST for characterizing low-temperature cracking resistance of asphalt concrete mixtures. Four asphalts and two aggregates were selected for the experiment. The mixture variables included asphalt type, aggregate type, and air voids content; the test condition variables included specimen size, stress relaxation, aging, and cooling rate. |
| 总页数： | 1994/06. pp106 (41 Fig., 28 Tab., 33 Ref., 1 App.) |
| 报告类型： | 科技报告 |
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