Effect of protective coating on axial resistance and residual capacity of self-compacting concrete columns exposed to standard fire. (1st August 2022)

• Record Type: Journal Article
• Authors: Ealiyas Mathews, Mervin; Kiran, Tattukolla; Anand, N.; Lubloy, Eva; Naser, M.Z.; Prince Arulraj, G.
• Is Part Of: Engineering structures. Volume 264(2022)
• Publication Date: 2022-08-01
• Subjects: SCC columns -- Fire coating -- Concrete -- Fire resistance -- FRP; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2022.114444
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: SCC is developed with FA/GGBFS as supplementary cementitious material. GGBFS specimens exhibited higher residual strength after the temperature exposure. CPP protective coatings have shown better resistance in retaining the strength of SCC. Basalt and Carbon wrappings are applicable for retrofitting up to 60 min of exposure. Abstract: Self-Compacting Concrete (SCC) is a green construction material widely used in the construction industry. While normal weight concrete has notable performance under fire conditions, the open literature continues to lack works examining the structural fire performance of SCC elements. Intending to bridge this knowledge gap, the present study aims to understand the efficiency of different protective coatings on fire response and the residual capacity of SCC short columns. In this experimental investigation, SCC columns were primarily cast from Supplementary Cementitious Materials (SCM) such as Fly Ash (FA) and Ground Granulated Blast Furnace Slag (GGBFS) with partial replacement of fine aggregate by utilising the optimum content of Expanded Perlite Aggregate (EPA). Then, a thermal protective coating comprising of Cement Perlite Plaster (CPP) was developed using Ordinary Portland Cement (OPC) and the EPA. The fire performance of SCC elements was examined when protected with the newly developed coating as well as Gypsum Plaster (GP), Basalt Wrapping (BW), and Carbon Wrapping (CW) when exposed to ISO 834 standard fire curve for 60, 90, 120, and 180 min. The experimental results revealed that SCC specimens developed using GGBFS had better resistance to all exposure durations than the FA-SCC specimens. Also, it was noted that the CPP-protected SCC specimens exhibited higher residual strength capacity, followed by GP-protected SCC specimens, compared to the BW and CW-SCC specimens under axial load.