Benefical Uses of Buffed Rubber as Fiber Mesh in Concrete Mixtures

By Karaline Jones and S. A. Durham.

Published by The International Journal of the Constructed Environment

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Article: Print $US10.00
Article: Electronic $US5.00

This study investigated the effects that recycled buffed rubber fiber mesh from the truck tire retreading process has on fresh and hardened concrete properties. Nine concrete mixtures containing varying amounts of buffed rubber fiber and commercially available polypropylene fiber were produced and compared, based on structural performance. Three concrete mixtures were prepared with polypropylene fibers in the amounts of 0.5%, 1.5%, and 0.5 cubic feet (cf). Five mixtures were tested with buffed rubber in amounts of 0.5%, 1.5%, 0.5 cf, 1.5 cf, and 2.5 cf. In addition, a control mixture containing no fiber mesh was prepared. A direct comparison between the 0.5%, 1.5%, and 0.5 cf mixtures was made and statistically analyzed. The workability increased with the buffed rubber fibers, however, it decreased with polypropylene fibers. The compressive strength decreased and the flexural strength increased with the addition of both types of fibers. The rubber fibers were more beneficial at reducing concrete permeability. The buffed rubber concrete mixtures exhibited exceptional residual strength after ultimate strength was reached. A statistical analysis determined that the recycled rubber fibers produced equal or superior compressive, flexural, and splitting tensile strength at 56 days of age when compared to companion mixtures made with polypropylene fibers. Thus, the potential use of this waste product for use in concrete infrastructure where fibers are utilized is expected.

Keywords: Waste Tires, Buffed Rubber Fibers, Polypropylene Fibers, Recycled, Concrete, Compressive Strength, Flexural Strength, Permeability

The International Journal of the Constructed Environment, Volume 2, Issue 4, pp.113-124. Article: Print (Spiral Bound). Article: Electronic (PDF File; 1.518MB).

Karaline Jones

Graduate Research Assistant, Department of Civil Engineering, University of Colorado Denver, Denver, USA

Karaline Jones is a graduate research assistant in the Department of Civil Engineering at the Unviersity of Colorado Denver. Her research interests include the examination of recycled waste tire on concrete properties. She obtained her MSCE from the University of Colorado Denver in 2011.

Dr. S. A. Durham

Associate Professor, Department of Civil Engineering, University of Georgia, Athens, USA

Dr. Durham is an associate professor in the Department of Civil Engineering at the Unviersity of Georgia. He teaches undergraduate and graduate courses in structural materials, reinforced and prestressed concrete design, and advanced concrete materials. His research interests include concrete materials, structural concrete, and sustainability through material selection and design. He obtained his BSCE, MSCE, and PhD in civil engineering with an emphasis in structural engineering from the University of Arkansas. He was an assistant professor in civil engineering at the University of Colorado Denver prior to his arrival at the University of Georgia in 2012.