Characterization of Cement-Fiber-Treated Reclaimed Asphalt Pavement Aggregates: Preliminary Investigation
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Abstract
The use of reclaimed asphalt pavement (RAP) materials in road construction has been proven to reduce both the amount of construction debris disposed of in urban landfills and the rate of depletion of natural resources. However, source-dependent product variability, federal and local environmental regulation, and deficient strength-stiffness characteristics often limit RAP applications in road bases. These limitations have led to new research efforts aimed at exploring novel, cost-effective, chemical and/or mechanical stabilization methods to treat RAP materials before their reuse in pavement construction. In this work, a series of tests were performed on RAP aggregate materials treated with different dosages of portland type I/II cement and with alkali-resistant glass fibers. Tests include permeability, leachate, unconfined compression, and small-strain shear moduli through resonant column testing. Leachate tests include pH, total and volatile dissolved solids, total and volatile suspended solids, and turbidity. Test results confirm the potential of cement-fiber-treated RAP material as an environmentally and structurally sound alternative to nonbonded materials for base and subbase applications in pavement engineering. A companion paper presents the results from a comprehensive repeated-load triaxial test program to investigate the resilient modulus characteristics of cement-treated RAP.
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Acknowledgments
The authors would like to acknowledge Mr. Fred Brouillette and Mr. Dan Richwine of Texas Industries Inc., Dallas, Texas, for their support throughout this work. The authors would also like to thank Mr. Cliff Ryan of Texas Industries Inc. and graduate research assistants Mohamed Adil Haque and Ajay Potturi of The Univ. of Texas at Arlington for their assistance during the experimental portion of this work.
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Information
Published In
Journal of Materials in Civil Engineering
Volume 23 • Issue 7 • July 2011
Pages: 977 - 989
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Dec 17, 2009
Accepted: Jan 7, 2011
Published online: Jan 10, 2011
Published in print: Jul 1, 2011
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