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WEALTH OF INFORMATION PRESENTED AT SUPERPAVE CONFERENCE.
| 题名： | WEALTH OF INFORMATION PRESENTED AT SUPERPAVE CONFERENCE. |
| 作者： | Smith-KH |
| 关键词： | SUPERPAVE-; CONFERENCES-; TRENDS-; TECHNOLOGY-; ASPHALT-PAVEMENTS; MIX-DESIGN; HIGH-PERFORMANCE; PAVEMENT-PERFORMANCE; PAVEMENT-CONSTRUCTION; COMPACTING-; RECYCLED-PAVEMENTS; PERMEABILITY-; AGGREGATES-; DENSITY- |
| 摘要： | At the "Superpave: Today and Tomorrow" conference, held April 21-23, 1998, in St. Louis, Missouri, the latest news on trends and technology related to Superpave, the high-performance asphalt pavement mix design system, were reported. Some of the most valuable and timely information that was exchanged at the conference was related to field construction. Superpave mixes can require a greater level of compactive effort. The mysterious "tender zone," a temperature zone (generally 93-116 deg C) in which some mixes become unstable, was discussed a great deal. The tender zone phenomenon seems to be related to ambient temperatures, and in some areas of the country, it has not been a problem at all. Use of recycled asphalt pavement in Superpave is becoming more commonplace. Permeability problems have emerged on some Superpave projects as well, most notably in northwest Florida, where the available aggregates make mixes more susceptible to this problem. Recommended solutions include high inplace densities with strict density-monitoring specifications, well-sealed longitudinal joints, and thicker lifts. |
| 总页数： | Public Roads. 1998/05. 61(6) pp7-8 (2 Phot.) |
| 报告类型： | 科技报告 |
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