Effect of finishing practices on surface structure and salt-scaling resistance of concrete. (November 2019)

• Record Type: Journal Article
• Authors: Amini, Kamran; Ceylan, Halil; Taylor, Peter C.
• Is Part Of: Cement & concrete composites. Volume 104(2019)
• Publication Date: 2019-11
• Subjects: salt scaling -- Surface hardness -- Bleeding -- Slag -- Spacing factor; Composite-reinforced concrete -- Periodicals; Concrete -- Periodicals; Composite materials -- Periodicals; Composites de ciment -- Périodiques; Béton -- Périodiques; Composites -- Périodiques; Béton léger -- Périodiques; Cement composites; Composite materials; Composite-reinforced concrete; Concrete; Lightweight concrete; Periodicals; Electronic journals; 620.135
• DOI: 10.1016/j.cemconcomp.2019.103345
• Languages: English
• ISSNs: 0958-9465

Abstract

Abstract: The impact of three different finishing times on the surface layer properties of concrete containing different contents of ground granulated blast-furnace slag (GGBFS) replacement was evaluated, as well as the relationship between finishing, abrasion resistance of surface layer, and salt-scaling resistance. In addition, a novel method for monitoring the bleeding period of fresh concrete was investigated. Based on the results obtained in this study, choice of finishing time can influence salt scaling resistance by affecting abrasion resistance of concrete mixtures. It was found that lower resistance of slag concrete to salt scaling is not necessarily due to a weaker surface layer. While slag replacement reduced the mixtures' scaling resistance, up to 40% of slag replacement improved mechanical properties, including surface abrasion resistance.