Accelerated Curing for Glass-Based Mortars Using Water at 80 °C

Taohua Ye, Jianxin Lu, Zhenhua Duan, Lei Li, Dayu Zhu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

The substitution of river sand with glass aggregate (GA) and cement with glass powder (GP) is a mainstream method to recycle waste glass. Traditionally, standard curing was widely used for glass-based mortars. However, it is time-consuming and cannot address low mechanical strengths of the early-age mortars. Therefore, the effect of water curing at 80 °C on the properties of GA mortars is investigated. Furthermore, the effect of the GP size is also considered. Results show that compared with the expansion of alkali-silica reaction (ASR), water curing at 80 °C has a negligible effect on the volume change. Moreover, the compressive strength of GA mortars under 1-day water curing at 80 °C is comparable with that under 28-day water curing at 20 °C. Therefore, the 1-day water curing at 80 °C is proposed as an accelerated curing method for GA mortars. On the other hand, the addition of GP with the mean size of 28.3 and 47.9 µm can effectively mitigate the ASR expansion of GA mortars. Compared with the size of 28.3 µm, GA mortars containing GP (47.9 µm) always obtain higher compressive strength. In particular, when applying the 1-day water curing at 80 °C, GA mortars containing GP (47.9 µm) can even gain higher strength than those containing fly ash.

Original languageEnglish
Article number2109
JournalMaterials
Volume15
Issue number6
DOIs
Publication statusPublished - 1 Mar 2022

Keywords

  • Accelerated curing
  • Compressive Strength
  • Glass aggregate mortar
  • Glass powder size
  • Volume stability

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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