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Author

Zi Mi

Bio: Zi Mi is an academic researcher. The author has contributed to research in topics: Coral sand & Coral reef. The author has an hindex of 1, co-authored 1 publications receiving 7 citations.

Papers
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Journal Article
TL;DR: In this article, the differences in performance between the coral reef sand,mechanism sand and natural sand were studied, and microscopic test methods were used to investigate the chemical composition and microstructure of different sands.
Abstract: The differences in performance between the coral reef sand,mechanism sand and natural sand were studied,and microscopic test methods were used to investigate the chemical composition and microstructure of different sands.The results showed that,the fineness module of the coral reef sand was small,and it was light and porous.The water absorption was high.The main lithofacies of the coral reef sand was calcite carbonatite,and the main composition was calcium carbonate.The surface of the coral reef sand was rough and existed a lot of pores.The water consumption and the dosage of additive of the coral reef sand concrete were higher,and density was lower than that of natural sand.

8 citations


Cited by
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Journal ArticleDOI
TL;DR: In this paper, 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 aggregate are discussed.

87 citations

Journal ArticleDOI
TL;DR: In this article, the raw materials, mechanical properties, durability and microstructure of coral concrete, and the performances of fiber reinforced coral concrete are described, showing that the performance of coral concretes can be improved by adding fibers to the mixture.
Abstract: Coral concrete materials, which refer to cement-based composites mixed with coral and seawater, have aroused interest worldwide since they were first used in reef engineering. This paper reviews the raw materials, mechanical properties, durability and microstructure of coral concrete, and describes the performances of fiber reinforced coral concrete. The microhardness of coral concrete in the interfacial transition zone is significantly higher than that of normal concrete, the compressive strength of normal concrete is greater than that of coral concrete, while the normal concrete is more durable than coral concrete. The flexural and splitting tensile strengths of coral concretes are improved remarkably by adding fibers to the mixture. The coral concrete performance is hindered by the poor cementation of the materials, as a result of the porous and brittle coral aggregates. Therefore, by modifying the coral aggregates and innovating the mixing methods in the preparation of high-performance coral concrete, further developments in marine structures and underwater engineering applications can be made using the material.

73 citations

Journal ArticleDOI
TL;DR: In this paper, the authors summarize the characteristics of coral aggregates and properties of coral aggregate concrete (CAC) and then propose future research needs based on the identified knowledge gaps.

58 citations

Journal ArticleDOI
TL;DR: In this paper, a glass fibre-reinforced polymer (GFRP)-confined coral aggregate concrete (CAC) cylinders (GCAC cylinders) were used as a novel composite column in marine engineering.

42 citations

Journal ArticleDOI
TL;DR: In this article, the fracture properties of seawater coral aggregate concrete (SCAC) by virtue of three-point-bending tests are investigated. And the size-independent fracture energy is derived based on the comparison between the analytical and experimental maximum fracture loads, which proves to be the maximum tensile stress at the fictitious crack-tip.

27 citations