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Durability of calcium sulfoaluminate cement concrete

硫铝酸钙水泥混凝土的耐久性问题

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Abstract

Calcium sulfoaluminate cement (CSAC), first developed in China in the 1970s, has received significant attention because of its expansive (or shrinkage-compensating) and rapid-hardening characteristics, low energy-intensity, and low carbon emissions. The production and hydration of CSAC (containing ye’elimite, belite, calcium sulfate, and minors) have been extensively studied, but aspects of its durability are not well understood. Due to its composition and intrinsic characteristics, CSAC concrete is expected to have better performance than Portland cement (PC) concrete in several aspects, including shrinkage and cracking due to restrained shrinkage, freeze-thaw damage, alkali-silica reaction, and sulfate attack. However, there is a lack of consensus among researchers regarding transport properties, resistance to carbonation, and steel corrosion protectiveness of CSAC concrete, all of which are expected to be tied to the chemical composition of CSAC and attributes of the service environments. For example, CASC concrete has poorer resistance to carbonation and chloride penetration compared with its PC counterpart, yet some studies have suggested that it protects steel rebar well from corrosion when exposed to a marine tidal zone, because of a strong self-desiccation effect. This paper presents a succinct review of studies of the durability of CSAC concrete. We suggest that more such studies should be conducted to examine the long-term performance of the material in different service environments. Special emphasis should be given to carbonation and steel rebar corrosion, so as to reveal the underlying deterioration mechanisms and establish means to improve the performance of CSAC concrete against such degradation processes.

概要

由于组分特征的不同, 硫铝酸钙水泥混凝土在一些方面天然优于硅酸盐水泥, 如收缩和收缩裂缝控制及对冻融破坏、 碱骨料反应和硫酸盐侵蚀的抵抗作用. 然而, 学界在硫铝酸盐水泥混凝土的传输性能、 抗碳化性能及钢筋腐蚀防护性能等方面尚未达成一致意见. 这些分歧皆归因于硫铝酸钙水泥化学组分及服役环境条件的变异性. 一些研究发现, 有的硫铝酸钙水泥混凝土虽然抵抗碳化和氯离子侵蚀的能力不如硅酸盐混凝土, 但强烈的内部自干燥使其可以在海洋潮汐环境中很好地保护混凝土结构中的钢筋。

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Acknowledgement

Financial support from the Advanced Materials for Sustainable Infrastructure Seed Funding Program at Missouri University of Science and Technology, USA, is gratefully acknowledged.

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Authors and Affiliations

Authors

Contributions

Bowen TAN: data collection and writing the original draft; Monday U. OKORONKWO: methodology and writing the original draft; Aditya KUMAR: conceptualization, reviewing and editing; Hongyan MA: conceptualization, supervision, reviewing, and editing.

Corresponding author

Correspondence to Hongyan Ma.

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Bowen TAN, Monday U. OKORONKWO, Aditya KUMAR, and Hongyan MA declare that they have no conflict of interest.

Additional information

Project supported by the National Science Foundation of the United States (Nos. 1932690 and 1761697)

Introducing new Editorial Board Member

Dr. Hongyan MA is an assistant professor of Civil Engineering in Missouri University of Science and Technology (Missouri S&T), USA. He received his PhD in Civil Engineering from the Hong Kong University of Science and Technology (HKUST), China in 2013, Master of Engineering in Structural Engineering from Shenzhen University, China in 2008, Bachelor of Engineering in Inorganic Non-metallic Materials Engineering and Bachelor in Law from Chongqing University, China in 2005. Before joining Missouri S&T in October 2015, he worked as a Post-doctoral Fellow in HKUST for two and a half years. Dr. MA’s current research interests include next-generation cements, functional materials, biotechnology in construction, smart systems for testing and evaluation, hydration kinetics of cementitious materials, multiscale characterization and modeling of concrete properties, and concrete deterioration and damage mitigation. Dr. MA has published over 80 refereed papers. These publications have received over 2000 citations, with an h-index of 26. He is an editorial board member of three journals, and an active reviewer for 40 prestigious journals. Dr. MA is also an active member of American Concrete Institute (ACI) and American Society of Civil Engineers (ASCE). He is a member of ACI Committees 122, 236, 242, and 546E, and an ASCE ExCEEd Fellow. Since joining Missouri S&T, Dr. MA has received the Joseph H. Senne Jr. Academy of Civil Engineers Scholarly Achievement Award, 2019 College of Engineering and Computing Dean’s Scholar, and 2019 Faculty Research Award of Missouri S&T.

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Tan, B., Okoronkwo, M.U., Kumar, A. et al. Durability of calcium sulfoaluminate cement concrete. J. Zhejiang Univ. Sci. A 21, 118–128 (2020). https://doi.org/10.1631/jzus.A1900588

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  • DOI: https://doi.org/10.1631/jzus.A1900588

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