Utility of polyvinyl alcohol fiber-based needle punched nonwoven fabric as potential reinforcement in cementitious composites

Pekmezci,; Kayaoglu, BK; Pourdeyhimi, Behnam; Karadeniz, AC

doi:10.1177/0021998313507614

Cited by 7 publications

(1 citation statement)

References 30 publications

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“…Polyvinyl alcohol (PVA) fibers have gained attention in several studies due to their high tensile strength and elastic modulus. 19 Several studies have been performed to study the effects of PVA fiber on geopolymer mortar mechanical characteristics. For example, Ohno and Li 20 included 2% PVA fibers by volume into fly ash incorporated geopolymer mortars.…”

Section: Introductionmentioning

confidence: 99%

Residual mechanical performance of lightweight fiber-reinforced geopolymer mortar composites incorporating expanded clay after elevated temperatures

Aljanabi

Çevik

Niş

et al. 2022

Journal of Composite Materials

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This research provides an experimental investigation on the properties of fiber reinforced composite materials consisting of lightweight expanded clay aggregates (LECA) and polyvinyl alcohol (PVA) fibers. The influence of temperature (room temperature, 250°C, and 500°C) on the lightweight geopolymer mortar (LWGM) composite materials is also explored. LECA is used as a partial replacement to river sand with 60% and 80%. The base material utilized for LWGM is slag activated by a mixture of sodium silicate and sodium hydroxide solutions. The fresh properties in terms of workability and density were performed. A series of experiments, such as compression, flexural and uniaxial tensile strength tests, were executed to assess the mechanical properties of LWGM composite materials. In addition, the microscopic variations due to the elevated temperature were also evaluated by scanning electron microscopy (SEM) to understand the macro-scale behavior of the samples. The results indicated that increasing the level of LECA replacement caused a reduction in the density and compressive strength of the LWGM. Also, incorporating a 1% PVA fiber volume fraction significantly enhanced the flexural and uniaxial tensile behavior of LWGM composite materials. The compressive strength enhancements were observed at 250°C due to further geopolymerization, while compressive strength reductions were obtained at 500°C due to the vapor impact and difference in thermal expansion. In addition, the load-carrying capacity of all samples increased, and displacement capacity decreased under flexural tests at 250°C. However, the ductile behavior of the PVA incorporating specimens changed to brittle due to the melting of PVA fibers.

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Section: Introductionmentioning

confidence: 99%