Title: Reduced alkali-silica reaction damage in recycled glass mortar samples with supplementary cementitious materials

Abstract

Recycling waste glass aggregate into concrete can reduce environmental impacts but also may lead to serious alkali silica reaction (ASR) damage. This study aims to characterize ASR damage development in the mortar samples containing reactive glass aggregates and investigate the damage reduction effect of the waste supplementary cementitious materials (SCMs), including recycled glass powders and fly ash. The recycled glass aggregate mortar samples with/without SCMs were prepared in this study. The length change tests were first conducted with the prepared mortar samples based on the ASTM C1260 standard. The results demonstrated the added SCMs can largely decrease early-age ASR expansion rate. The optical microscope and Scanning Electron Microscope (SEM) with Energy Dispersive X-ray Spectroscopy (EDS) were further conducted to characterize the ASR damage in mortar samples and investigate the damage mitigation mechanism with added SCMs. The combined SEM imaging and chemical analysis indicated added SCMs can decrease both the alkali and calcium content of the generated ASR gel. In addition, the ASR damage development inside mortar samples were monitored with dynamic micron X-ray CT (μCT) over a reaction period of 63 hour at the temperature of 80°C. The scanning patterns demonstrated the ASR damage can be easily developed from themore » area with initial cracks and sharp corners. In conclusion, the images of glass power and fly ash samples showed significantly reduced ASR damage. This study showed that adding of SCMs can largely reduce ASR deterioration and thus facilitate the recycling glass particles into concrete.« less

Authors:

Guo, Shuaicheng ^[1]; Dai, Qingli ^[1]; Sun, Xiao ^[1]; Xiao, Xianghui ^[2]; Si, Ruizhe ^[1]; Wang, Jiaqing ^[1]

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+ Show Author Affiliations

1. Michigan Technological Univ., Houghton, MI (United States). Dept. of Civil and Environmental Engineering
2. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS), X-ray Science Division

Publication Date:

2017-11-28

Research Org.:

Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Org.:

USDOE Office of Science (SC), Basic Energy Sciences (BES); China Scholarship Council; Michigan Department of Environmental Quality

OSTI Identifier:

1473680

Grant/Contract Number:  

AC02-06CH11357

Resource Type:

Accepted Manuscript

Journal Name:

Journal of Cleaner Production

Additional Journal Information:

Journal Volume: 172; Journal Issue: C; Journal ID: ISSN 0959-6526

Publisher:

Elsevier

Country of Publication:

United States

Language:

English

Subject:

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 36 MATERIALS SCIENCE; Glass Particle; Fluorescent microscope; Supplementary cementitious materials; X-ray computed tomography; SEM-EDS; ASR damage