2019 CSCE Annual Conference - Laval (Greater Montreal)

2019 CSCE Annual Conference - Laval (Greater Montreal) Conference

Title
Shrinkage and Expansion of Glass Aggregate Cement Mortar

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Recycled Materials

Author(s)
Ms. Karla Gorospe, University of Windsor
Dr. Emad Booya, University of Windsor
Mr. Adeyemi Adesina, University of Windsor
Dr. Sreekanta Das, University of Windsor (Presenter)
Abstract

The use of recycled glass aggregates in concrete materials initiated around the 1970s as a means of controlling the disposal of refuse glass. Many researchers have proven that cementitious materials containing recycled glass is sustainable and feasible; however, since its beginnings, uncertainties in its durability have limited its applications. Thus, this research investigated the durability of glass aggregate cement mortars by evaluating its susceptibility to volumetric changes. Shrinkage and expansion of concrete and cement mortar can cause unwarranted cracks which can affect long-term durability and serviceability. In this study, crushed glass and glass beads were used as aggregate replacements to determine their effects on drying shrinkage and alkali silica reaction expansion. It was found that the type, size, and amount of glass greatly influence shrinkage and expansion of glass aggregate cement mortar specimens. Further, the inherently low absorption capacity of the glass improves dimensional stability and minimizes detrimental shrinkage. Incorporating finer glass particles was also found to reduce the effects of alkali silica reaction expansion.