Effects of Crushed Oyster Shell on Strength and Durability of Marine Concrete Containing Fly Ash and Blastfurnace Slag

Medžiagotyra

Leo Gu LI¹  Hai-Yan CHEN¹  Zhen-min LAI¹  Pi-mao CHEN²  Albert Kwok Hung KWAN³  Pui Lam NG⁴ 

[1] Guangdong University of Technology;South China Sea Fisheries Research Institute;The University of Hong Kong, Hong Kong;Vilnius Gediminas Technical University and The University of Hong Kong;

关键词: oyster shell;    blastfurnace slag;    fly ash;    green concrete;    marine concrete;   

DOI  :  10.5755/j01.ms.25.1.18772

来源: DOAJ

【 摘 要 】

A large quantity of oyster shell is generated every year in coastal regions. Instead of being dumped as waste, after crushing or grinding, oyster shell may be recycled for use in concrete. Herein, the use of crushed oyster shell (COS) in conjunction with fly ash (FA) and blastfurnace slag (BS) to produce marine concrete was studied. By varying the COS, FA and BS contents in the marine concrete, the combined effects of COS, FA and BS on the cube compressive strength, water penetration, cyclic wetting-drying chloride attack and long-term seawater attack resistances were evaluated. The results showed that the addition of proper amounts of COS, FA and BS has positive effects on the strength and durability of marine concrete, but excessive COS may have negative effects. Hence, the combined addition of COS, FA and BS up to a certain optimum COS content is a promising way of producing a higher performance and greener marine concrete.

【 授权许可】

Unknown