Mechanical and Fiber-Bridging Behavior of Slag-Based Composite with High Tensile Ductility

Abstract

This paper presents an experimental and analytical investigation of the fundamental mechanism of the highly ductile behavior of strain-hardening slag-based composite reinforced by polyethylene fibers. Composite properties, including compressive strength and tensile behavior of the composite, were identified. Micromechanical characteristics, including matrix fracture toughness and interfacial properties between matrix and fiber, were investigated and the fiber-bridging behavior of the composite was simulated. The tensile behavior of the composite was evaluated by micromechanical analysis. Test results showed that the composite had extremely high tensile ductility of up to 7.5% and high tensile strength of 8.5 MPa, along with a moderate compressive strength of 36.8 MPa. Saturated cracking patterns with controlled crack width of 59.8 μm were also observed in the composite. Considering the variation of matrix properties and fiber distribution, the theoretical fiber-bridging curve simulated the tensile behavior of the composite well, and the micromechanical analysis results supported the tensile behavior of the composite.

Effect of recycled tyre polymer fibre on engineering properties of sustainable strain hardening geopolymer composites

“…Although several studies [17][18][19][20] showed that SHGC utilising ground granulated blast-furnace slag (GGBS) can attain a superior tensile ductility (up to 7.5%), the SHGC incorporating solely GGBS has poor workability, low setting time and high shrinkage strain [21][22][23] that are not favourable for the engineering applications.…”

Mechanical Properties of Alkali-Activated Slag Fiber Composites Varying with Fiber Volume Fractions

“…This characteristic of high-ductile behavior of the fiber composite could be attractive for its use as a construction material [8][9][10][11]. Studies on fiber-reinforced alkali-activated slag composites have been investigated by several researchers, and it is known that they have similar tendencies of mechanical properties as fiber composites based on ordinary Portland cement [12][13][14][15]. When manufacturing high-ductility fiber-reinforced composites, the fiber in the constituent material is very expensive, and it is necessary to control the amount of fiber according to the required performance of the fiber composite.…”