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GEORGIA DEPARTMENT OF TRANSPORTATION'S EXPERIENCE WITH MICROSURFACING.
| 题名： | GEORGIA DEPARTMENT OF TRANSPORTATION'S EXPERIENCE WITH MICROSURFACING. |
| 作者： | Watson-D; Jared-D |
| 关键词： | MICROSURFACING-; GEORGIA-; SEAL-COATS; FRICTION-COURSE; POLYMER-ASPHALT; AESTHETICS-; TEST-SECTIONS; PERFORMANCE-EVALUATIONS; INTERSTATE-HIGHWAY-SYSTEM; PAVEMENT-PERFORMANCE; PAVEMENT-SMOOTHNESS; PAVEMENT-FRICTION; NOISE-LEVELS; REHABILITATION- |
| 摘要： | Microsurface mix, or microsurfacing, can be used for sealing and providing a friction surface for cracked and deteriorated surface mixes. This mix, essentially consisting of 9.5-mm (0.37-in.) screenings bonded by a polymer-modified asphalt emulsion, is economical and can be placed very swiftly. Microsurfacing is also aesthetically pleasing because of its resemblance to hot-mix asphalt. In 1990-1991, the Georgia Department of Transportation (GDOT) successfully used microsurfacing in a test section on I-75 in Henry County, which had high traffic volumes and a heavy truck concentration. Two varieties of the mix were used, and both showed little deterioration after 2 years. In 1996, GDOT opted to use microsurfacing for a 9.2-km (5.7-mi) section of I-285 in Atlanta between Conley Road and Old National Highway. This 92-lane-km (57-lane-mi) project was initiated to address the raveling and cracking in the section and improve its appearance before the 1996 summer Olympics. The I-285 project began in late May 1996 and was completed in 1 month. The microsurfacing used on I-285 has performed quite well since the project was completed. No additional problems with raveling or load cracking have been encountered. The mix has provided excellent smoothness and good friction, with a minimal increase in pavement noise levels. Microsurfacing may be suitable for use on cracked pavements in lieu of more conventional rehabilitation methods such as crack sealing, leveling, and double surface treatments. |
| 总页数： | Transportation Research Record. 1998. (1616) pp42-46 (5 Tab.) |
| 报告类型： | 科技报告 |
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