Effect of Modified Polyvinyl Alcohol Fibers on the Mechanical Behavior of Engineered Cementitious Composites

Sun, Mian; Chen, Youzhi; Zhu, Jiaoqun; Sun, Tao; Shui, Zhonghe; Li, Gang; Zhong, Haoxuan

doi:10.3390/ma12010037

Cited by 22 publications

(13 citation statements)

References 33 publications

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“…To investigate various fibers on the performance of cement-based materials, some scholars primarily conduct mechanical experiments to study the performance improvement of various fiber types, dosages, length dimensions, and modification treatments [ 1 , 2 , 3 ]. Niu et al [ 4 ] conducted mechanical tests on PVA-ECC specimens with varying fiber concentrations.…”

Section: Introductionmentioning

confidence: 99%

Frost Resistance Investigation of Fiber-Doped Cementitious Composites

Zou

et al. 2022

Materials

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Fibers used as reinforcement can increase the mechanical characteristics of engineering cementitious composites (ECC), but their frost resistance has received less attention. The mechanical properties of various fiber cementitious materials under the dual factors of freeze-thaw action and fiber dose are yet to be determined. This study examines the performance change patterns of cementitious composites, which contain carbon fiber, glass fiber, and polyvinyl alcohol (PVA) fiber at 0%, 0.5%, and 1% volume admixture in freeze-thaw tests. Three fiber cement-based materials are selected to do the compression and bending testing, and ABAQUS finite element modeling is used to assess the performance of fiber cement-based composite materials. The microscopic observation results show that the dispersion of glass and PVA fibers is higher than that of carbon fibers. As a result, the mechanical characteristics of the fiber-doped cementitious composites increase dramatically after freeze-thaw with increasing dosage. The compression test results show the frost resistance of carbon fiber > PVA fiber > glass fiber. In addition, the bending test results show the frost resistance of carbon fiber > glass fiber > PVA fiber. The 3D surface plots of the strength changes are established to observe the mechanical property changes under the coupling effect of admixture and freeze-thaw times. ABAQUS modeling is used to predict the strength of the cementitious composites under various admixtures and freeze-thaw cycles. The bending strength numerical equation is presented, and the bending and compressive strengths of three different fiber-cement matrix materials are accurately predicted.

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Section: Introductionmentioning

confidence: 99%

Frost Resistance Investigation of Fiber-Doped Cementitious Composites

Zou

et al. 2022

Materials

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“…Polyvinyl alcohol (PVA) fiber is a synthetic fiber with acid resistance, alkali resistance, high strength and high modulus. As a reinforcing fiber, it has the advantages of high deformation capacity, superior tensile properties and excellent fracture properties, which have been recognized by the material-science and engineering community [ 32 , 33 , 34 ]. Li et al [ 35 ] found that the concrete fracture-damage process becomes longer with the incorporation of polyvinyl alcohol fibers.…”

Section: Introductionmentioning

confidence: 99%

Study of SPRC Impact Resistance Based on the Weibull Distribution and the Response Surface Method

Chen

Liu

et al. 2022

Polymers

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Silica-fume–polyvinyl-alcohol-fiber-reinforced concrete (SPRC) is a green and environmentally friendly composite material incorporating silica fume and polyvinyl alcohol fiber into concrete. To study the impact resistance of SPRC, compressive-strength and drop hammer impact tests were conducted on SPRC with different silica-fume and polyvinyl-alcohol-fiber contents. The mechanical and impact resistance properties of the SPRC were comprehensively analyzed in terms of the compressive strength, ductility ratio and impact-energy-dissipation variation. Based on the impact resistance of the SPRC, the impact life of SPRC with different failure probabilities was predicted by incorporating the Weibull distribution model, and an impact damage evolution equation for SPRC was established. The impact life of SPRC under the action of silica-fume content, polyvinyl-alcohol-fiber content and failure probability was analyzed in depth by the response surface method (RSM). The research results show that, when the content of silica fume is 10% and the content of polyvinyl alcohol fiber is 1%, the compressive strength and impact resistance of SPRC are the best. The RSM response model can effectively predict and describe the impact life of SPRC specimens under the action of three factors.

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“…The volume of PVA fiber varied from 0.5% to 2.0%, and were recommended for use to enhance durability and ductility of cementitious composites [6][7][8]. Sun et al found that the cementitious composites with 2% PVA fiber content had enhanced strain capacity and toughness [9]. Zhang et al addressed that 1% PVA fiber content was optimal for reaching maximum mechanical properties of cementitious composites [10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Sand Size on Mechanical Performance of Cement-Based Composite Containing PVA Fibers and Nano-SiO2

et al. 2020

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Both finer sand and nanoparticles have a filler effect on mechanical performance of cement-based composite. In this paper, the influence of sand size in mechanical performance of cement-based composites, containing polyvinyl alcohol fiber (PVA) and nano-SiO2 (NS), was investigated. The studied mechanical performance, included compressive, flexural, tensile strength, and fracture toughness. A 0.9% volumetric percentage of PVA and a 2% NS mass content were used to make cement-based composites with a 0.38 w/b. Silica sand with four sand size ranges (380–830 μm, 212–380 μm, 120–212 μm and 75–120 μm) was adopted as fine aggregate. The 28-day curing was conducted for all specimens under 20 °C and 95% humidity. It is concluded that the finer sand decreased workability and mechanical strength of PVA-reinforced composites containing NS. However, this reduction was very limited for the sand particles less than 380 µm. The ultimate tensile stain, fracture toughness, and energy were decreased as sand size declined. In addition, the fracture performance of the composites was greatly dependent on fracture energy.

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Effect of Modified Polyvinyl Alcohol Fibers on the Mechanical Behavior of Engineered Cementitious Composites

Cited by 22 publications

References 33 publications

Frost Resistance Investigation of Fiber-Doped Cementitious Composites

Frost Resistance Investigation of Fiber-Doped Cementitious Composites

Study of SPRC Impact Resistance Based on the Weibull Distribution and the Response Surface Method

Effect of Sand Size on Mechanical Performance of Cement-Based Composite Containing PVA Fibers and Nano-SiO2

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