Title: Assessment of ternary blends based on bentonite in mitigating alkali silica reactivity in waste glass substituted mortars

Authors: Osama Bin Muhammad; Khan Shahzada; Akhtar Gul; Ezaz Ali Khan; Muhammad Ashraf Tanoli; Muhammad Sadiq Khattak

Addresses: Department of Civil Engineering, University of Engineering and Technology, Peshawar, Pakistan ' Department of Civil Engineering, University of Engineering and Technology, Peshawar, Pakistan ' Department of Civil Engineering, University of Engineering and Technology, Campus-III Bannu, Peshawar, Pakistan ' Department of Civil Engineering, University of Engineering and Technology, Campus-III Bannu, Peshawar, Pakistan ' Department of Civil Engineering, Ghulam Ishaq Khan Institute of Engineering Sciences and Technology, Topi, Pakistan ' Department of Mechanical Engineering, University of Engineering and Technology, Peshawar, Pakistan

Abstract: In this research study, an effort has been made to mitigate the alkali silica reaction (ASR), by incorporating ternary blends of bentonite and silica fume as partial replacement of cement in mortars, containing waste glass at different replacement levels. Binary blends consisting of either bentonite or silica have also been tested. The impact of ternary mixtures and waste glass on the mechanical behaviour in terms of compressive strength of mortar has also been studied. Mortar bar and accelerated mortar bar method have been used for ASR determination. Results indicate that up to 20% glass can be easily replaced as expansion values remain below the limiting value of 0.1% at the end of 16 days. For 40% glass final limit of 0.20% is crossed, indicating the deleterious ASR. Ternary blends were found to be more effective in mitigating ASR as compared to binary blends.

Keywords: bentonite; waste glass; mortar; alkali silica reaction; ASR; mechanical properties.

DOI: 10.1504/IJSTRUCTE.2022.126179

International Journal of Structural Engineering, 2022 Vol.12 No.4, pp.358 - 373

Received: 05 Sep 2021
Accepted: 21 Oct 2021
Published online: 14 Oct 2022 *

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