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

被引:146
作者
Wang, Aiguo [1 ]
Lyu, Bangcheng [1 ]
Zhang, Zuhua [2 ,3 ]
Liu, Kaiwei [1 ]
Xu, Haiyan [1 ]
Sun, Daosheng [1 ]
机构
[1] Anhui Jianzhu Univ, Anhui Key Lab Adv Bldg Mat, Hefei 230022, Anhui, Peoples R China
[2] Hunan Univ, Key Lab Green & Adv Civil Engn Mat & Applicat Tec, Coll Civil Engn, Changsha 410082, Hunan, Peoples R China
[3] Univ Southern Queensland, Ctr Future Mat, Toowoomba, Qld 4350, Australia
基金
澳大利亚研究理事会; 中国国家自然科学基金;
关键词
Coral concrete; Coral aggregate; Cementitious materials; Fiber reinforcement; Mix proportion design; MAGNESIUM OXYSULFATE CEMENT; BLAST-FURNACE SLAG; FLY-ASH; SULFATE ATTACK; MECHANICAL-PROPERTIES; AGGREGATE CONCRETE; AUTOGENOUS SHRINKAGE; COMPRESSIVE STRENGTH; GEOPOLYMER CONCRETE; SAND CONCRETE;
D O I
10.1016/j.conbuildmat.2018.07.202
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
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. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1004 / 1019
页数:16
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