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Access Type

Open Access

Degree Program

Civil Engineering

Degree Type

Master of Science in Civil Engineering (M.S.C.E.)

Year Degree Awarded


Month Degree Awarded



Recycle, Glass, Concrete, Alkali-Silica Reaction


Increased accident rates during the nighttime and wet weather conditions on the United States highways necessitate the enhancement of highway concrete barrier visibility. The visibility of these delineators is dependent on their reflectivity. Several methods are proposed that stand to increase the reflectivity of these concrete barriers, such as the use of white cement versus gray cement and the attachment of raised pavement markers to the side of the barriers. The incorporation of recycled glass into the concrete mixture is one of the proposed methods that was put through further laboratory study. The aim of the laboratory testing was to identify proper mixing proportions that mitigate the potential for the alkali-silica reaction (ASR) in recycled glass aggregate concretes without producing any negative effects on the compressive strength of the concrete. The retroreflectivity of these concrete mixtures was also evaluated and is presented in this report.

First Advisor

Scott A. Civjan

Second Advisor

Sergio F. Breña