Date of Award

December 2013

Degree Type

Thesis

Degree Name

Master of Science

Department

Engineering

First Advisor

Habib Tabatabai

Committee Members

Habib Tabatabai, Konstantin Sobolev, Rani Elhajjar

Keywords

Modified Resin

Abstract

High-temperature performance of polyester- based construction materials is an important consideration when fire safety is a concern. These materials are typically used as non-structural components of buildings and other structures. Structural retrofits using fiber-reinforced polymer (FRP) composites are also gaining popularity. However, a major disadvantage of polymer- based materials (including FRP composites) is their flammability and toxic gas generation at high temperatures. The main objective of this research effort was to determine the mechanical properties and high-temperature performance of a polyester resin modified with various amounts of an industrial by-product additive. The additive used was Flu-Gas Desulfurization (FGD) gypsum, which is a byproduct of electricity generation in coal-burning power plants.

Compression and tensile strengths, stiffness, toughness, and impact resistance were measured. Thermo gravimetric analyses (TGA) were also performed to determinate material loss at a range of temperatures up to1100°C. A limited number of flame combustion tests were also conducted. Experimental results indicate that the tensile strength, stiffness, and energy-absorption capability of polyester resin can be markedly enhanced with the addition of FGD gypsum. TGA results show improved high-temperature performance in polyester resin modified with FGD gypsum and up to 50% of total composite. Under flame exposure, FGD gypsum provides a fire-resistant exterior barrier at the surface of the composite, which serves to protect the interior materials.

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