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USE OF RECYCLED ASPHALT PAVEMENT AND CRUSHED CONCRETE AS BACKFILL FOR MECHANICALLY STABILIZED EARTH RETAINING WALLS

GRADUATE RESEARCH ASSISTANTS: Chirayus Viyanant, Abhishek Jain (graduated 2004), Tien-Wei Hsieh (graduated 2003), Patrick Carley (graduated 2001)
COLLABORATORS: A. Rauch (Co-PI) and K. Folliard (Co-PI)

FUNDED BY: Texas Department of Transportation

DESCRIPTION
This Texas Department of Transportation-sponsored research project is a multi-disciplinary project to characterize recycled asphalt pavement (RAP) and crushed concrete (CC) as backfill material for mechanically stabilized earth (MSE) walls. Geotechnical characterization includes strength testing, hydraulic conductivity testing, reinforcement pull out testing, and creep testing. Materials testing includes corrosion and durability testing of metallic and polymeric reinforcement.

PUBLICATIONS
Rathje, E.M., Viyanant, C., and Rauch, A.F. 2005. "Creep Behavior of Recycled Asphalt Pavement Backfill," Proceedings, 16th International Conference on Soil Mechanics and Geotechnical Engineering, September.

Viyanant, C., Rathje, E.M., and Rauch, A.F. 2004. “Field Compaction Control of Crushed Concrete and Recycled Asphalt Pavement using the Nuclear Gauge,” Proceedings, Geo-Trans 2004, Los Angeles, CA, July.

Abhishek Jain (May 2004, co-advised with Alan F. Rauch) "Evaluation of Pullout Capacity of Ribbed Metallic Strip Reinforcement in Crushed Concrete and Recycled Asphalt," M.S. Thesis, Univ. of Texas at Austin.

Tien-Wei Hsieh (May 2003, co-advised with Alan F. Rauch) "Hydraulic Conductivity of Recycled Asphalt Pavement and Crushed Concrete," M.S. Thesis, Univ. of Texas at Austin.

Rathje, E.M., Rauch, A.F., Folliard, K.J., Trejo, D., Little, D., Viyanant, C., Ogalla, M., Esfeller, M. 2002. “Recycled Asphalt Pavement and Crushed Concrete Backfill: Results from Initial Durability and Geotechnical Tests,” Research Report 0-4177-2, Center for Transportation Research, October, 84 pp.

Rathje, E.M., Rauch, A.F., Folliard, K.J., Trejo, D., Little, D., Viyanant, C., Ogalla, M., Esfeller, M. 2001. “Recycled Asphalt Pavement and Crushed Concrete Backfill: State-of-the-Art Review and Material Characterization,” Research Report 0-4177-1, Center for Transportation Research, October, 116 pp.

Patrick Carley (December 2001, co-advised with Alan F. Rauch) "Shear Strength and Hydraulic Conductivity of RAP and CC," M.S. Thesis, Univ. of Texas at Austin.