Abstract
Abstract This article discusses the influence of fiber types, including polyvinyl alcohol (PVA) fiber, polyethylene (PE) fiber, and steel fiber (SF), on the compressive strength, flexural strength, bending toughness, and tensile ductility of lightweight cement-based composites. The fiber dispersion and the microscopic morphology were assessed using fluorescence and scanning electron microscopes. The result showed that the SFs had the best effect in enhancing the compressive and flexural strengths of lightweight cement-based composites, and its compressive and flexural strengths reached 88.9 and 17.6 MPa, respectively. Compared with the PVA and the SFs, the PE fiber had the most significant effect on the ductility of lightweight cement-based composites; the tensile strength and the ultimate tensile strain were 3.29 MPa and 2.56%, respectively, due to a very high bridging capability provided by the PE fiber. A large amount of hydration products adhered to the surface of the PVA fiber, which improved the adhesion between the cement matrix and the PVA fiber and caused the rupture of most of the PVA fiber. Overall, lightweight toughness cement-based composites containing PVA and PE fibers have a good deformability, which can meet the needs of construction and transportation engineering applications.
Highlights
This article discusses the influence of fiber types, including polyvinyl alcohol (PVA) fiber, polyethylene (PE) fiber, and steel fiber (SF), on the compressive strength, flexural strength, bending toughness, and tensile ductility of lightweight cement-based composites
The results showed that the SFs improved the mechanical properties of concrete more than the woolen or glass fibers
The macroscopic mechanical properties of lightweight cement-based composites reinforced by three fibers were composed, which included compressive strength, flexural strength, bending toughness, and tensile ductility
Summary
Abstract: This article discusses the influence of fiber types, including polyvinyl alcohol (PVA) fiber, polyethylene (PE) fiber, and steel fiber (SF), on the compressive strength, flexural strength, bending toughness, and tensile ductility of lightweight cement-based composites. Bangi and Horiguchi [16] studied the influence of three fiber types with different geometries on the maximum pore pressure measured at different depths in high strength concrete and found that polypropylene fibers were the most effective in mitigating the maximum pore pressure development compared with polyvinyl alcohol (PVA) or SFs. 250 Wenhua Chen et al. Branston et al [17] evaluated the merit of two types of basalt fibers, including bundle dispersion fibers and minibar fibers, in enhancing the mechanical properties of concrete and found that the two types of basalt fibers enhanced the pre-cracking strength, but only minibar fibers improved the post-cracking behavior. The macroscopic mechanical properties of lightweight cement-based composites reinforced by three fibers were composed, which included compressive strength, flexural strength, bending toughness, and tensile ductility.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
