The development of coral concretes and their upgrading technologies: a critical review

Wang, Aiguo and Lyu, Bangcheng and Zhang, Zuhua and Liu, Kaiwei and Xu, Haiyan and Sun, Daosheng (2018) The development of coral concretes and their upgrading technologies: a critical review. Construction and Building Materials, 187. pp. 1004-1019. ISSN 0950-0618


The utilization of locally available raw materials is extremely necessary for the offshore island construction in ocean. Coral can be used as aggregate but is usually light and porous, having rough surface, weak adherence to the attachments and high concentration of sea salts. These characteristics affect the workability, mechanical properties, volume stability and durability of resulting concretes. This review paper discussed the instability of Portland cement hydration products under the ocean environment, the low strength and stiffness of coral aggregates, their large connected porosity and the weak interface microstructure between the cement matrix and coral aggregates. To overcome these problems, such as low grade of strengths, inadequate corrosion resistance and high brittleness, this paper proposed some perspective techniques: modification of coral aggregate, development of new cementitious materials, fiber reinforcement and mix proportion design.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials
Date Deposited: 01 Feb 2019 04:02
Last Modified: 05 Feb 2019 02:23
Uncontrolled Keywords: coral concrete; coral aggregate; cementitious materials; fiber reinforcement; mix proportion design
Fields of Research : 09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Funding Details:
Identification Number or DOI: 10.1016/j.conbuildmat.2018.07.202

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