Hydration mechanisms and durability of hybrid alkaline cements (HACs): A review
Article
Article Title | Hydration mechanisms and durability of hybrid alkaline cements |
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ERA Journal ID | 3470 |
Article Category | Article |
Authors | Xue, Lili (Author), Zhang, Zuhua (Author) and Wang, Hao (Author) |
Journal Title | Construction and Building Materials |
Journal Citation | 266, pp. 1-14 |
Article Number | 121039 |
Number of Pages | 14 |
Year | 2020 |
Publisher | Elsevier |
Place of Publication | Netherlands |
ISSN | 0950-0618 |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.conbuildmat.2020.121039 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S0950061820330439 |
Abstract | Hybrid alkaline cement (HAC) is regarded as a new binder which is composed of more than 70% supplementary cementitious materials (SCMs), less than 30% Portland cement and a small dosage of alkali activator. This cementitious material possesses the advantages of Portland cement and alkali-activated materials (AAMs) and provides more compact microstructure, high early strength and excellent resistance to sulfate attack and chloride penetration. This paper provides an overview on the hydration mechanisms of HACs and durability, including resistance to aggressive solutions and high temperatures, carbonation and efflorescence, chloride ion penetration and alkali-aggregate reaction. It is evident that HAC is more durable than Portland cement in a number of environments; however, the lack of long- term track records in field is the barrier for application. This paper also discusses the knowledge gap to facilitate the future research and development of HAC materials. |
Keywords | Aggressive solutions; Alkali-aggregate reaction; Efflorescence; Hybrid alkaline cement; Shrinkage |
ANZSRC Field of Research 2020 | 401602. Composite and hybrid materials |
400505. Construction materials | |
Byline Affiliations | Centre for Future Materials |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q6zx6/hydration-mechanisms-and-durability-of-hybrid-alkaline-cements-hacs-a-review
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