A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Characterization of Cold In-Place Recycling Asphalt Mixtures
The high cost and environmental impact of pavement rehabilitation has led to an increase in the use of Cold In-Place Recycling (CIR) as an effective alternative to other rehabilitation strategies. However, currently there is not a universally accepted or standard mix-design for CIR. Therefore, the project is being undertaken with the objective to develop a performance-based mix-design procedure for CIR through laboratory evaluation and limited field verification. The present project focuses on partial-depth CIR using asphalt emulsions as the recycling agent. After evaluating the modified Marshall mix-design recommended by the AASHTO Task Force No. 38, a new volumetric mix-design has been developed utilizing the Superpave gyratory compactor and technology. It requires that specimens are prepared at densities similar to those found in the field. It also suggests that specimens should be cured at 140° F for 24 hours. This will allow for the most consistent specimens, while at the same time, most effectively utilizing the time of laboratory personnel. The performance of CIR mixtures prepared and constructed in accordance with the new mix-design was evaluated in the laboratory as well as in the field. The resistance characteristics, in relation to rutting and fatigue cracking, were predicted using the computer program, VESYS. Creep compliance and strength were determined using the Indirect Tensile Tester (IDT) to evaluate the resistance against low-temperature cracking.
Characterization of Cold In-Place Recycling Asphalt Mixtures
The high cost and environmental impact of pavement rehabilitation has led to an increase in the use of Cold In-Place Recycling (CIR) as an effective alternative to other rehabilitation strategies. However, currently there is not a universally accepted or standard mix-design for CIR. Therefore, the project is being undertaken with the objective to develop a performance-based mix-design procedure for CIR through laboratory evaluation and limited field verification. The present project focuses on partial-depth CIR using asphalt emulsions as the recycling agent. After evaluating the modified Marshall mix-design recommended by the AASHTO Task Force No. 38, a new volumetric mix-design has been developed utilizing the Superpave gyratory compactor and technology. It requires that specimens are prepared at densities similar to those found in the field. It also suggests that specimens should be cured at 140° F for 24 hours. This will allow for the most consistent specimens, while at the same time, most effectively utilizing the time of laboratory personnel. The performance of CIR mixtures prepared and constructed in accordance with the new mix-design was evaluated in the laboratory as well as in the field. The resistance characteristics, in relation to rutting and fatigue cracking, were predicted using the computer program, VESYS. Creep compliance and strength were determined using the Indirect Tensile Tester (IDT) to evaluate the resistance against low-temperature cracking.
Characterization of Cold In-Place Recycling Asphalt Mixtures
Brayton, Todd E. (author) / Lee, K. Wayne (author) / Harington, Jason (author) / Kearney, Edward J. (author)
Construction Institute Sessions at ASCE Civil Engineering Conference 2001 ; 2001 ; Houston, Texas, United States
Construction and Materials Issues 2001 ; 193-205
2001-10-08
Conference paper
Electronic Resource
English
Characterization of Cold In-Place Recycling Asphalt Mixtures
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