A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
History, Development, and Performance of Asphalt Rubber at ADOT. Special Report
The report evaluates ADOT's two decades of experience with asphalt-rubber materials. It discusses the chronological development of asphalt rubber by ADOT and the five principle uses of asphalt rubber. The performance of asphalt-rubber materials are determined from historical records and pavement test sections. The performance of asphalt rubber is evaluated by utilizing historical data from ADOT's pavement management system database and by reviewing eight experimental projects which included 47 test sections. Pavement condition distress surveys were performed on several of these projects to determine the terminal condition of the pavements. Asphalt-rubber materials have been placed on over 700 miles of roadway on the State system. This is approximately ten percent of ADOT's highway network. Although regularly used on the Interstate System, the principle use has occurred on State and U.S. Routes. The major application has been in mitigating reflective cracking with over 90% of the applications consisting of SAMs and SAMIs. The average life of a SAM is approximately five years on the Interstate and ten years and eight years for the State and U.S. Routes, respectively. The coefficient of variation in service life ranges between 30%-40% for all three highway classifications. The average life of a SAMI is approximately nine years for both the Interstate and State Routes while it is only three years on the U.S. Routes. Asphalt rubber has successfully been used as an encapsulating membrane to control pavement distortion due to expansive soils and to reduce reflection cracking in overlays on both rigid and flexible pavements.
History, Development, and Performance of Asphalt Rubber at ADOT. Special Report
The report evaluates ADOT's two decades of experience with asphalt-rubber materials. It discusses the chronological development of asphalt rubber by ADOT and the five principle uses of asphalt rubber. The performance of asphalt-rubber materials are determined from historical records and pavement test sections. The performance of asphalt rubber is evaluated by utilizing historical data from ADOT's pavement management system database and by reviewing eight experimental projects which included 47 test sections. Pavement condition distress surveys were performed on several of these projects to determine the terminal condition of the pavements. Asphalt-rubber materials have been placed on over 700 miles of roadway on the State system. This is approximately ten percent of ADOT's highway network. Although regularly used on the Interstate System, the principle use has occurred on State and U.S. Routes. The major application has been in mitigating reflective cracking with over 90% of the applications consisting of SAMs and SAMIs. The average life of a SAM is approximately five years on the Interstate and ten years and eight years for the State and U.S. Routes, respectively. The coefficient of variation in service life ranges between 30%-40% for all three highway classifications. The average life of a SAMI is approximately nine years for both the Interstate and State Routes while it is only three years on the U.S. Routes. Asphalt rubber has successfully been used as an encapsulating membrane to control pavement distortion due to expansive soils and to reduce reflection cracking in overlays on both rigid and flexible pavements.
History, Development, and Performance of Asphalt Rubber at ADOT. Special Report
L. A. Scofield (author)
1989
44 pages
Report
No indication
English
Highway Engineering , Construction Equipment, Materials, & Supplies , Pavement condition , Pavement overlays , Pavement surface texture , Asphalts , Road materials , Durability , Service life , Specifications , Surface roughness , Membranes , Highway maintenance , Management systems , Pavement wear , Road surfaces , Asphalt rubber
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