Impact of waste glass on carbonation of geopolymer mixtures
Abstract
This paper investigates the potential benefits of using waste glass (WG) fines as a sustainable and low-cost alternative compared to natural sand (NS) in geopolymer mortar. Utilising glass as aggregate is a relatively new concept and not much work has been done on it, especially its durability properties are yet to be explored. Different mixtures with different fly ash to slag ratios and with natural sand or waste glass were designed. The compressive strength results showed that at any stage the NS mixes had higher strength than the WG mixes, however, WG mixes had a higher strength gain rate at later stages of the test. Increasing the content of slag increased the compressive strength and resistance against carbonation. WG samples were less susceptible to carbonation and the depth of carbonation was lower in mixes with WG compared to that of with NS. It can be concluded that apart from the environmental and economic benefit WG provides, high grade geopolymer mortar with WG can be achieved.
Impact of waste glass on carbonation of geopolymer mixtures
This paper investigates the potential benefits of using waste glass (WG) fines as a sustainable and low-cost alternative compared to natural sand (NS) in geopolymer mortar. Utilising glass as aggregate is a relatively new concept and not much work has been done on it, especially its durability properties are yet to be explored. Different mixtures with different fly ash to slag ratios and with natural sand or waste glass were designed. The compressive strength results showed that at any stage the NS mixes had higher strength than the WG mixes, however, WG mixes had a higher strength gain rate at later stages of the test. Increasing the content of slag increased the compressive strength and resistance against carbonation. WG samples were less susceptible to carbonation and the depth of carbonation was lower in mixes with WG compared to that of with NS. It can be concluded that apart from the environmental and economic benefit WG provides, high grade geopolymer mortar with WG can be achieved.
