Fresh and hardened properties of seawater-mixed concrete

Adel Younis, Usama Ebead, Prannoy Suraneni, Antonio Nanni

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

Using seawater for mixing concrete is potentially advantageous from a sustainability perspective. However, the presence of high concentrations of chloride in the seawater can lead to corrosion of steel reinforcement. This issue can be addressed by using non-corrosive reinforcement; e.g., fiber reinforced polymer (FRP) bars. Moreover, the global threat of freshwater scarcity suggests that the use of seawater in concrete mixtures becomes plausible in the future. This paper reports on the results of an extensive experimental study to compare the fresh and hardened properties of freshwater- and seawater-mixed concretes. The experimental program included the following tests: (a) characterization of fresh concrete (slump flow, density, yield, air content, and setting time); (b) mechanical characterization of hardened concrete (compressive strength, splitting tensile strength, and shrinkage); and (c) permeability performance of hardened concrete (rapid chloride permeability, chloride migration, and water absorption). The use of seawater had a notable effect on the fresh concrete properties. Mechanical performance of seawater concrete was slightly lower than that of the freshwater-mixed concrete. The permeability performance of hardened concrete in the two mixtures was similar. Scanning electron microscopy and isothermal calorimetry were used as supplementary tools to better explain the experimental observations. Finally, remedial measures were proposed based on lab trials to improve the properties of seawater concrete.

Original languageEnglish (US)
Pages (from-to)276-286
Number of pages11
JournalConstruction and Building Materials
Volume190
DOIs
StatePublished - Nov 30 2018

Keywords

  • Fresh concrete properties
  • Hardened concrete properties
  • Isothermal calorimetry
  • Permeability
  • Scanning electron microscopy (SEM)
  • Seawater concrete

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

Fingerprint Dive into the research topics of 'Fresh and hardened properties of seawater-mixed concrete'. Together they form a unique fingerprint.

  • Cite this