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http://dx.doi.org/10.14190/JRCR.2019.7.2.158

Analytical Study on Flexural Behavior of Alkali-Activated Slag-Based Ultra-High-Ductile Composite  

Lee, Bang Yeon (School of Architecture, Chonnam National University)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.7, no.2, 2019 , pp. 158-165 More about this Journal
Abstract
The purpose of this study is to investigate analytically the flexural behavior of beam reinforced by an alkali-activated slag-based fiber-reinforced composite. The materials and mixture proportion were selected to manufacture an alkali-activated slag-based fiber-reinforced composite with high tensile strain capacity over 7% and compressive strength and tension tests were performed. The composite showed a compressive strength of 32.7MPa, a tensile strength of 8.43MPa, and a tensile strain capacity of 7.52%. In order to analyze the flexural behavior of beams reinforced by ultra-high-ductile composite, nonlinear sectional analysis was peformed for four types of beams. Analysis showed that the flexural strength of beam reinforced partially by ultra-high-ductile composite increased by 8.0%, and the flexural strength of beam reinforced fully by ultra-high-ductile composite increased by 24.7%. It was found that the main reason of low improvement in flexural strength is the low tensile strain at the bottom of beam. The tensile strain at bottom corresponding to the flexural strength was 1.38% which was 18.4% of tensile strain capacity of the composite.
Keywords
Composite; Flexural behavior; Furnace slag; Ultra high ductility;
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