Effects of chloride ion in sea sand on properties of fresh and hardened concrete incorporating supplementary cementitious materials. Issue 6 (2nd November 2022)

• Record Type: Journal Article
• Authors: Dang, Viet Quoc; Ogawa, Yuko; Bui, Phuong Trinh; Kawai, Kenji
• Is Part Of: Journal of sustainable cement-based materials. Volume 11:Issue 6(2022)
• Page Start: 439
• Page End: 451
• Publication Date: 2022-11-02
• Subjects: Chloride ion -- supplementary cementitious materials -- workability -- mechanical properties -- permeability -- porosity; Cement -- Periodicals; Cement composites -- Periodicals; Cement; Cement composites; Periodicals; 620.135
• DOI: 10.1080/21650373.2021.1992683
• Languages: English
• ISSNs: 2165-0373

Abstract

Abstract : This study aims to explore the applicability of non-desalted sea sand (NSS) for concrete production by investigating the effects of chloride ion on properties of fresh and hardened concrete incorporating fly ash (FA) and ground granulated blast furnace slag (BFS). All mixtures were prepared with a constant water-to-cementitious materials ratio of 0.50. The results showed that chloride ion in NSS had no effect on the slump loss and air content reduction of fresh concrete for 60 min after mixing. Thermal analysis and pore structure results clarified that chloride ion accelerated the pozzolanic reactivity of FA and hydraulicity of BFS at early ages. The presence of chloride ion also contributed to the increase in the mechanical properties and durability (permeability and sorptivity) of concrete at later ages. The outcomes of this study could validate the potential application of NSS for concrete incorporating supplementary cementitious materials as the alternative fine aggregate at coastal areas.