Multiscale microstructure and micromechanical properties of alkali-activated concrete: A critical review
Article
Tu, W. and Zhang, M. 2024. Multiscale microstructure and micromechanical properties of alkali-activated concrete: A critical review. Cement and Concrete Composites. 152 (Art. 105664). https://doi.org/10.1016/j.cemconcomp.2024.105664
Authors | Tu, W. and Zhang, M. |
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Abstract | With the rapid development of alkali-activated concrete (AAC) as a promising sustainable concrete, it is vital to thoroughly understand the microstructural characteristics and micromechanical properties, which determine the macroscopic mechanical properties and structural performance of AAC. This paper presents a critical review on the multiscale microstructure and micromechanical properties of AAC with both single and blend precursor systems, including alkali-activated fly ash (AAF), alkali-activated metakaolin (AAMK), alkali-activated slag (AAS), and alkali-activated fly ash-slag (AAFS). These types of AAC are systematically studied from nano-scale to macro-scale, covering solid gel particles (N-A-S-H, C-A-S-H and N-C-A-S-H), gel matrix (solid gel particles + gel pores), paste (unreacted particles + reaction products + pores), mortar and concrete (paste + interfacial transition zone + aggregates). The recent advances in microstructure and micromechanical properties of AAC are discussed, with special focus on microstructure-mechanical property relationships. The remaining challenges and opportunities for future research are also provided. |
Journal | Cement and Concrete Composites |
Journal citation | 152 (Art. 105664) |
ISSN | 1873-393X |
0958-9465 | |
Year | 2024 |
Publisher | Elsevier |
Accepted author manuscript | License File Access Level Anyone |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.cemconcomp.2024.105664 |
Publication dates | |
Online | 11 Jul 2024 |
Publication process dates | |
Accepted | 09 Jul 2024 |
Deposited | 26 Jul 2024 |
Copyright holder | © 2024 Elsevier |
https://repository.uel.ac.uk/item/8y0xx
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