Sampling Location Impact on Measured Asphalt Content of Hot Mix Asphalt
Author | : Mohammad Abu-Hassan |
Publisher | : |
Total Pages | : 80 |
Release | : 2002 |
ISBN-10 | : UCBK:C101254087 |
ISBN-13 | : |
Rating | : 4/5 (87 Downloads) |
Book excerpt: In May 2000, the Colorado Department of Transportation (CDOT) requested a forensic study of a project located on I-24 north of Denver. The request was made because, within a year of the 1997 overlay, longitudinal cracking appeared in the surface. Transverse cracks were attributed to reflective cracking. However, the longitudinal cracks appeared to be surface initiated. In October 2000, a forensic team reviewed the project and established a sampling and testing plan to take cores from the roadway. Based on data analysis of the cores, the higher than expected in-place air voids, the low effective asphalt, and segregation within the mat, all contributed to the early cracking.