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

  • Hai-Yan CHEN Guangdong University of Technology
  • Leo Gu LI Guangdong University of Technology
  • Zhen-min LAI Guangdong University of Technology
  • Albert Kwok Hung KWAN The University of Hong Kong, Hong Kong
  • Pi-mao CHEN South China Sea Fisheries Research Institute
  • Pui Lam NG Vilnius Gediminas Technical University and The University of Hong Kong
Keywords: oyster shell, blastfurnace slag, fly ash, green concrete, marine concrete

Abstract

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.

Author Biographies

Hai-Yan CHEN, Guangdong University of Technology
School of Materials and Energy
Leo Gu LI, Guangdong University of Technology
School of Civil and Transportation Engineering
Zhen-min LAI, Guangdong University of Technology
School of Materials and Energy
Albert Kwok Hung KWAN, The University of Hong Kong, Hong Kong
Department of Civil Engineering
Pui Lam NG, Vilnius Gediminas Technical University and The University of Hong Kong
Faculty of Civil Engineering
Published
2019-01-08
Section
CONSTRUCTION MATERIALS