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FORENSIC INVESTIGATION OF EARLY CRACKING ON I-25 IN DENVER, COLORADO.
| 题名： | FORENSIC INVESTIGATION OF EARLY CRACKING ON I-25 IN DENVER, COLORADO. |
| 作者： | Anderson-M; D'Angelo-J; Huber-G |
| 关键词： | Air-voids; Asphalt-content; Asphalt-pavements; Cracking-; Denver-Colorado; Deterioration-; In-place-density; Mechanical-properties; Mixtures-; Overlays-Pavements; Surface-course-Pavements; Testing- |
| 摘要： | In May 2000 the Colorado Department of Transportation (CDOT) requested a forensic evaluation of a project located in I-25 north of Denver, Colorado. Within a year of the 1997 overlay, longitudinal cracking appeared in the surface. Two years later the pavement appeared to be deteriorating rapidly. In October 2000, a forensic team of pavement experts reviewed the project and established a sampling and testing plan. Based on the data analysis, it was the opinion of the forensic team that the early cracking of I-25 was caused by several factors, which were combined on this project. The factors included: higher in-place air voids than expected, and low effective asphalt and segregation within the mat. The forensic team also provided recommendations to minimize occurrences of similar behavior on future projects. The forensic team recommended CDOT evaluate alternate surface mixtures, methods of measuring in-place density, methods of measuring asphalt content and methods of measuring mechanical properties of mixtures. |
| 总页数： | 2001/08. pp132 (Phots., Figs., Tabs., Refs., Apps.) |
| 报告类型： | 科技报告 |
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