Abstract
This study examined the effect of using waste glass powder (GP) as a partial precursor in alkali activated mortars exposed to H2SO4 and HCl acid solutions for one year. The changes in physical appearance, surface alkalinity, mass, compressive strength and microstructure of the hardened samples after immersion in acid solutions were evaluated. The findings of the test program revealed that the inclusion of 10%–20% GP as a replacement of fly ash (FA) substantially reduced the physical, mechanical and microstructural damages of the specimens due to acid attack. This is attributed to the additional Si, Na and Ca ions provided by GP that enhanced the formation of reaction products and introduced a dense microstructure with reduced porosity. However, the use of GP content beyond 20% increase the availability of free Ca and porosity that led to considerable deterioration when exposed to the acid solutions.
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