Work

Heat of hydration, water sorption and microstructural characteristics of paste and mortar mixtures produced with powder waste glass

Year: 2024

Type: article

Abstract: Powder waste glass (PWG) is used as partial replacement of cement towards manufacturing of various cementitious materials. Through its pozzolanic reaction PWG results into enhancement of microstructure of the resulting mixture and improves its characteristics at macrolevel. This paper investigates the effects of PWG at 10%, 15%, and 20% replacement of cement on the flow characteristic, setting time, compressive strength, water sorption, rate of heat of hydration, cumulative heat of hydration; alkali silica reaction (ASR) and microstructure characteristics of the resulting paste and mortar mixtures. Total eight cementitious mixtures including two control mixtures have been investigated in this experimental program to evaluate the effect of PWG on the fresh and hardened state characteristics of paste and mortar mixtures. Test results show that the incorporation of PWG in the cementitious mixtures results in significant enhancement of their microstructure, increase in compressive strength, improvement in moisture barrier characteristics, and considerable reduction in the rate of heat of hydration and cumulative heat of hydration. Up to 20 wt.% replacement of cement with fine PWG is seen to be innocuous from the stand point of ASR. Furthermore, the use of PWG in paste results into delaying the initial and final setting times and increases the flow characteristic of the mortar mixture.

Source: Cogent Engineering

DOI: 10.1080/23311916.2023.2297466

Authors: Roz-Ud-Din Nassar, Danish Saeed, Tewodros Ghebrab, Shah Room, Ahmed Deifalla, Kadhim Al Amara