Study on Performance of PVA Fiber Reinforced Concrete Exposed for 10 Years to Seawater Spray

Ito, Hajime; Watanabe, Ken; Todoroki, Shuntaro; Suemori, Hisashi; Shinjyo, Ryo

doi:10.3151/jact.16.159

Cited by 6 publications

(3 citation statements)

References 5 publications

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“…The latest research programmes in that area are focused mostly on subjects concerning newly developed materials [ 8 , 10 , 20 ], the ecological impact of building materials [ 19 , 22 ] or less typical performance tests [ 18 , 21 ]. Moreover, the influence of various aggressive environments on fibre-reinforced concrete has been described in articles [ 28 , 29 ]. Fibre-reinforced material investigations are also important in terms of the growing interest in fibre-reinforced polymer composites [ 30 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

Flexural Behaviour of Cementitious Mortars with the Addition of Basalt Fibres

et al. 2021

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The results of flexural tests of basalt fibre-reinforced cementitious mortars in terms of flexural strength and the occurrence of the bridging effect are summarised. Mixture proportions and curing conditions were altered for various series. The main parameters concerning mixture proportions were water to cement ratio (w/c), micro-silica and plasticiser addition and fibre dosage (1%, 3% and 6.2% by binder’s mass). Various curing conditions were defined by different temperatures, humidity and time. The influence of the amount of water inside the pores of the hardened cementitious matrix on the flexural strength values, as far as the impact of the alkaline environment on basalt fibres’ performance is concerned, was underlined. The designation of flexural strength and the analysis of post-critical deformations were also performed on the reference series without fibres and with the addition of more common polypropylene fibres. The bridging effect was observed only for the basalt fibre-reinforced mortar specimens with a relatively low amount of cement and high w/c ratio, especially after a short time of hardening. For the lowest value of w/c ratio (equalling 0.5), the bridging effect did not occur, but flexural strength was higher than in the case of non-reinforced specimens. Comparing mortars with the addition of basalt and polypropylene fibres, the former demonstrated higher values of flexural strength (assuming the same percentage dosage by the mass of the binder). Nevertheless, the bridging effect in that case was obtained only for polypropylene fibres.

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Section: Introductionmentioning

confidence: 99%

Flexural Behaviour of Cementitious Mortars with the Addition of Basalt Fibres

et al. 2021

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“…Among them, the development speed of fiber concrete is very fast, and it has become the fastest-growing new cement-based composite material in modern times. Among them, PVA fiber has attracted the most attention [3][4].…”

Section: Introductionmentioning

confidence: 99%

Crack Resistance and Toughening Mechanism of Nano-SiO2 Reinforced PVA Fiber Cement-based Composites in Steel Bridge Engineering

2022

IJETC

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With the development of steel bridge engineering science, PVA fiber cement-based composite materials are gradually being explored and applied. Because of its high ductility and toughness, it has received extensive attention from academia and industry. Cement-based composite materials are essentially made of cement-related raw materials, which are mixed with various other materials to form composite materials. Incorporating Nano-SiO 2 into it can effectively improve the structural performance and durability of cement-based composite materials. Therefore, the purpose of this paper is to study the crack resistance and toughness mechanism of Nano-SiO 2 reinforced PVA fiber cement-based composites in steel bridge engineering. This paper first determined the design plan of the mix ratio of the Nano-SiO 2 PVA fiber cement-based composite material, and then used the composite beam composed of PVA fiber concrete and existing concrete as the experimental object. The test data shows that when the amount of hydrophilic nanopowder SiO 2 reaches 1%, the compressive strength of the mortar at the second and third day of age is increased. At this time, the higher the content of hydrophilic nanopowder SiO 2 , the higher its compressive and flexural strength. However, when the content is greater than 1.0%, the content of hydrophilic nano-powder SiO 2 has no great influence on the improvement of its compressive strength.

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“…Therefore, the authors have been researching means to provide light and very strong PC slabs using lightweight aggregate concrete mixed with short PVA fibers. The reason for focusing on short PVA fibers is that it has been confirmed that RC members have excellent shear capacity and durability (Ito et al 2014(Ito et al , 2018. Previous studies confirmed that PC slabs made of lightweight aggregate concrete mixed with 0.5 vol% of short PVA fibers (hereinafter, FLPC slab) results in a concrete density of 19.0 kN/m 3 or less even in one-way prestressed slabs, and that these slabs have the same punching shear capacity as those made of normal weight concrete (Kitano et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Punching Shear Capacity of Prestressed Concrete Slabs Made of Lightweight Concrete Mixed with Short Fibers

Kitano¹,

Ito

Suzuki³

2021

ACT

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The purpose of this study is to examine means of creating light and very strong prestressed concrete slabs made of lightweight aggregate concrete mixed with short fibers. The experiments reported in this paper demonstrated that the ratio of short fibers in the mix must be kept to 0.5 vol% or less, in order to obtain the same strength as that demonstrated by lightweight aggregate concrete designed to a standard strength of 50 N/mm 2 . In addition, the results of load testing various slabs confirmed that lightweight PC slabs mixed with 0.5 vol% of short PVA fibers had the same punching shear capacity as PC slabs made from normal weight concrete. The results led to the conclusion that the increase in the shear capacity of lightweight PC slabs mixed with short fibers was caused by the suppression of the progress of cracks in the RC direction and an accompanying tide arch formation in the PC direction. This paper is the English translation of the authors' previous work [Kitano, Y., Ito, H. and Suzuki, S., (2020). "Study on lightweight and high strength prestressed concrete slab by using lightweight concrete mixed with short fibers.

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Study on Performance of PVA Fiber Reinforced Concrete Exposed for 10 Years to Seawater Spray

Cited by 6 publications

References 5 publications

Flexural Behaviour of Cementitious Mortars with the Addition of Basalt Fibres

Flexural Behaviour of Cementitious Mortars with the Addition of Basalt Fibres

Crack Resistance and Toughening Mechanism of Nano-SiO2 Reinforced PVA Fiber Cement-based Composites in Steel Bridge Engineering

Punching Shear Capacity of Prestressed Concrete Slabs Made of Lightweight Concrete Mixed with Short Fibers

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