A COMPREHENSIVE EVALUATION OF ENVIRONMENTAL CONDITIONING SYSTEM
Many highway agencies face the problem of premature failure of asphalt concrete pavements due to moisture damage. Various laboratory tests have been used to predict the moisture susceptibility of asphalt concrete mixtures. Unfortunately, none of the available laboratory tests are able to accurately discriminate between well and poor performing mixes; that is, the laboratory test results do not necessarily correlate well with the field performance. Recent studies performed under the Strategic Highway Research Program (SHRP) indicate that the environmental conditioning system (ECS) is a device that better simulates the field conditions. Based on the initial studies, the ECS seemed to be able to distinguish moisture susceptible mixes. A recent study conducted by the Colorado Department of Transportation suggested that the ECS device and testing procedure needed further evaluation before it could be incorporated in the routine use. A study was undertaken at the University of Texas at El Paso (UTEP) to evaluate the ECS. Based on the results from this study, the ECS needs improvements both in terms of conditioning of asphalt concrete mixture, as well as, resilient modulus test setup. Specifically, the resilient modulus test setup of the ECS needs improvement in the precision and accuracy of the measurements.
- Research study title: Evaluation of ECS for Predicting Damage Susceptibility of HMAC.
University of Texas, El PasoCenter for Geotechnical and Highway Materials Research
El Paso, TX United States 79968-0516
Austin, TX United States 78763-5051
Washington, DC United States 20590
- Tandon, Vivek
- Vemuri, N
- Nazarian, S
- Publication Date: 1996-7
- Features: Figures; Tables;
- Pagination: 30 p.
- TRT Terms: Accuracy; Asphalt concrete; Environmental and sanitary systems in buildings; Laboratory tests; Modulus of resilience; Moisture content; Performance evaluations; Precision; Test procedures; Testing equipment
- Identifier Terms: Strategic Highway Research Program
- Uncontrolled Terms: Environmental conditioning system; Moisture susceptibility
- Subject Areas: Highways; Materials; I31: Bituminous Binders and Materials;
- Accession Number: 00724961
- Record Type: Publication
- Report/Paper Numbers: TX-96-1455-1, Res Rept 1455-1
- Contract Numbers: Study 0-1455
- Files: TRIS, USDOT, STATEDOT
- Created Date: Aug 27 1996 12:00AM