Effect of high temperature on the strength of mortar containing glass as a supplementary cementitious material: An experimental study

• Main Authors: Patil, Sachin S., Patil, Yogesh D.
• Format: Conference Proceeding
• Language: English
• Subjects: Glass mortar; High temperature; Residual strength; Waste glass powder
• ISSN: 2214-7853; 2214-7853
• DOI: 10.1016/j.matpr.2022.04.496

The present scenario of the construction sector has changed rapidly due to economic growth and urbanization. The consumption of ordinary Portland cement has immensely increased worldwide due to huge cement concrete demand. However, the significant consumption of cement has drastically enhanced environmental pollution and led to prime CO2 emitter and contributing to global warming. It is observed globally that cement production is solely contributing to 58% of the overall man-made CO2 emissions. Accordingly, an appropriate solution to the problem is using different types of waste in concrete as cementitious material to reduce CO2 emissions, which is a fruitful approach to control global warming and promote sustainable construction. It is further noticed that the rapid growing waste like glass and its disposal in landfills is not an environmentally friendly solution in regards to the non-biodegradable nature of glass. Hence, this experimental study works on exploring the solution to the above mentioned problem and projects the performance of glass powders (GP) as a partial replacement for ordinary Portland cement under elevated temperatures. The results reported in this study reveal that the strength retained by the cement after heating is a very vital parameter when introducing new cementitious material in cement. For the purpose, several mixes were prepared in which glass powder is utilized from 10%, 20% and 30% of cement replacement. The glass mortar cubes were tested in compression at various temperatures ranges like room temperature, 200, 400, 600 and 800 °C. Results show sample with 10% GP retained more compressive strength and showed sound performance than the normal sample under elevated temperature. The result shows two distinct temperature series regarding the incorporation of glass powder on the strength of mortars. The mortar mix with 20% GP showed a noble performance by retaining the decent residual strength after heating, and the average strength loss of the reference sample was observed at 5.2% more than the glass mortar sample. After temperatures range 400 °C, the rapid strength loss was encountered, which may be due to the dehydration of CH.