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Alkali-silica reaction and strength of concrete with pretreated glass particles as fine aggregates

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Abstract In this study, the strength and alkali-silica reaction (ASR) of concrete by incorporating pretreated soda-lime glass particles as fine aggregates were investigated. The glass aggregates were pretreated with three different… Click to show full abstract

Abstract In this study, the strength and alkali-silica reaction (ASR) of concrete by incorporating pretreated soda-lime glass particles as fine aggregates were investigated. The glass aggregates were pretreated with three different solutions: Ca(OH)2, NaOH, and a mixture of Ca(OH)2 and NaOH. The glass aggregates were pretreated for 1, 4, and 7 days to investigate the time-dependent effect. Results show that the ASR was mitigated in all pretreatments. The effect was more noticeable with pretreatment in a mixed solution. The effect increased with an increase in pretreatment time. The ASR expansion was reduced by approximately 50% by pretreating the glass aggregate in the mixed solution at 80  ° C for 7 days. Moreover, pretreatment of the glass aggregate was beneficial for strength improvement. For example, by pretreating the glass aggregate in the Ca(OH)2 solution at 80  ° C for 7 days, the 28-day compressive strength demonstrated an approximate 6% increment compared with the specimen with non-pretreated glass aggregates.

Keywords: strength; glass particles; glass; silica reaction; alkali silica; particles fine

Journal Title: Construction and Building Materials
Year Published: 2021

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