ORCID Identifier(s)

0000-0001-5437-8517

Graduation Semester and Year

2020

Language

English

Document Type

Thesis

Degree Name

Master of Science in Civil Engineering

Department

Civil Engineering

First Advisor

Warda NurAshraf Yazdani

Second Advisor

Hojat Himan Jalali

Abstract

This research focuses on determining the effects of adding glass aggregate and glass pozzolan to concrete that has been exposed to high temperatures. Previous work, based on finding the recommended proportions of recycled components for optimum results, was done to analyze the effects of adding recycled glass components to concrete. Based on those studies, a replacement ratio of 30% glass aggregates and 20% glass pozzolan was used in this project. The compressive strength of concrete has been extensively studied and has been shown to increase in strength when glass components are used in their correct proportions. Less research has been done on the flexural strength, and no previous research has been done on the flexural strength of glass concrete, which is the focus of this project. The hypothesis of this research is that concrete gains flexural strength with the addition of glass, after being exposed to high temperatures. To prove the hypothesis, six beams were made with regular concrete, six beams were made with 20% glass pozzolan as cement replacement, and six beams were made with 20% glass pozzolan as cement replacement and 30% glass aggregate as coarse aggregate replacement. After heat treating the beams and performing a 3-point flexural test, it was found that the samples containing 20% glass pozzolan as cement replacement had the highest load capacity, better heat resistance, and overall strong mechanical behavior, before and after heat treatment. The beams with glass pozzolan and glass aggregate showed less flexural strength than those of regular concrete before heat treatment; however, after being exposed to heat for one hour, their flexural strength was higher to that of regular concrete. The glass concrete also demonstrated an insulating effect, as its internal temperature was the lowest recorded during the heat treatment.

Keywords

Recycled glass, flexural load capacity, elevated temperatures, compressive strength, cement, coarse aggregate.

Disciplines

Civil and Environmental Engineering | Civil Engineering | Engineering

Comments

Degree granted by The University of Texas at Arlington

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