Mechanical properties and cracking potential of alkali-activated materials containing waste glass powder
Date
2022-05
Authors
Nodehi, Mehrab
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Abstract
In the construction industry, the production, processing, and transportation of ordinary portland cement (OPC) is a significant contributor of greenhouse gas emissions that can lead to environmental degradation and even resource depletion. To mitigate the negative impacts of OPC and improve concrete performance, supplementary cementitious materials (SCMs) have been used for decades. However, the projected reduction in the availability of traditional SCMs, such as coal fly ash has increased the interest in searching for alternative and widely available SCMs. One of such materials is glass that has an annual production around 100 million tons, but due to the high energy consumption in recycling glass, the glass industry has a low recycling rate (about 26%). The use of ground waste glass as a SCM can have substantial energy and economic implications due to the reduction in landfilling of this waste material. In this study, the mechanical properties and cracking potential of traditional portland cement based- and alkali-activated materials containing waste glass powder via a series of mechanical tests and a customized ring test. The results showed that the aluminosilicate-based glass powder performs very differently in each binding system, possibly because of its Al content contributing to geopolymerization in geopolymer mortars. Further, the result of restrained shrinkage test showed that the cracking duration, style and width are significantly different in each binding system. The result of this study is significant and point to different performance of glass powder in portland cement and geopolymer binders.
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Keywords
Glass powder, Cracking of geopolymer, Restrained shrinkage
Citation
Nodehi, M. (2022). Mechanical properties and cracking potential of alkali-activated materials containing waste glass powder (Unpublished thesis). Texas State University, San Marcos, Texas.