Title:
Evaluation of Portland Cement and Geopolymer Based Mortars Containing Glass Powder
Author(s):
Mehrab Nodehi and Xijun Shi
Publication:
Web Session
Volume:
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
10/23/2022
Abstract:
In the construction industry, the production, processing, and transportation of ordinary portland cement (OPC) is a significant contributor of greenhouse gas emissions. Harvesting raw materials (e.g., limestone) for the cement production can lead to natural 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 of 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 were investigated via a series of mechanical tests and a customized ring test. The results showed that the aluminosilicate-based glass powder performed very differently in the two binding systems. In addition, the ring test showed that the cracking time, pattern, and width are significantly different between the two binding systems.