Date of Award

Winter 2007

Project Type

Thesis

Program or Major

Civil Engineering

Degree Name

Master of Science

First Advisor

David L Gress

Abstract

With the rising cost and dwindling supply of conventional concrete aggregates, recycled concrete aggregate (RCA) is becoming a viable alternative. A performance study of RCA pavements was done in 1994 on nine different RCA pavement sections with ages ranging from six to fourteen years old. A second study was performed in 2006. In addition to the nine sections studied in 1994, two new RCA pavement sections were analyzed. The purpose of the 2006 study was to revaluate the performance of these aging and highly traveled RCA pavements.

Such factors as ASR, maximum aggregate size, RCA mortar content and load transfer dowels affected pavement performance. Additionally, multiple pavements were rehabilitated since the 1994 study with diamond grinding and retrofitting of dowel bars for load transfer, which had a positive effect on performance. Overall, seven different states built acceptable recycled concrete pavements that performed similar to conventional pavements.

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