Mechanical Properties and Microstructure of Alkali-Activated Slag Grouting Materials Exposed to Flowing Solution
Publication: Journal of Materials in Civil Engineering
Volume 34, Issue 12
Abstract
The durability of alkali-activated slag grouting materials (AASGMs) has attracted significant research attention. This paper investigated the mechanical properties and microstructure of AASGMs mortars and pastes immersed in a flowing 5% solution. Compared with the strengths of AASGMs immersed for 3 days, the flexural and compressive strengths of AASGMS immersed for 56 days increased by 11.1% and 37.8%, respectively. The leaching depth of AASGMS immersed for 56 days was 0.627 mm. The AASGMs had good antiflowing solution deterioration performance. The leaching process of AASGMS in flowing solution was divided into three stages: (1) neutralization of residual alkali in gel pores; (2) decalcification of calcium aluminate silicate hydrate (C-A-S-H) gels in the surface and intermediate layers to form calcium carbonate and silica gels; and (3) leaching of calcium and silicon in surface layers from calcium carbonate and silica gels.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published paper.
Acknowledgments
This work was supported by the National Natural Science Foundation of China (51962024 and 51768010), Guangxi Scientific and Technological Development Projects (AC19050011), and Nanning Scientific and Technological Development Projects (20193129).
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Published In
Journal of Materials in Civil Engineering
Volume 34 • Issue 12 • December 2022
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© 2022 American Society of Civil Engineers.
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Received: Nov 11, 2021
Accepted: Mar 29, 2022
Published online: Sep 27, 2022
Published in print: Dec 1, 2022
Discussion open until: Feb 27, 2023
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