Journal
CEMENT AND CONCRETE RESEARCH
Volume 124, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.cemconres.2019.105810
Keywords
Geopolymer; Creep; Nanoindentation
Funding
- National Key R&D Program of China [2018YFB0605700]
- National Natural Science Foundation of China [51879230, 51778570]
- Fundamental Research Funds for the Central University of China [2019QNA4044]
- Center for Infrastructure Engineering Studies at Missouri University of Science and Technology
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In this study, the creep behavior of binder phase in metakaolin-based geopolymers (MKGs) was investigated using nanoindentation. The underlying influence of the Si/Al ratio on the creep behavior was determined from detailed microstructure characterization and micromechanical analysis. The results indicated a strong correlation between the binder-scale creep behavior in MKG and its microstructure, particularly the characteristic pore size, which was further related to the Si/Al ratios of the binder. Combined with micromechanical analysis, the underlying influence of the composition and structure on the creep behavior in MKG was further explained.
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