Long-Term Deterioration of GFRP in Water and Moist Environment

Nishizaki, Itaru; Meiarashi, Seishi

doi:10.1061/(asce)1090-0268(2002)6:1(21)

Cited by 77 publications

(41 citation statements)

References 7 publications

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“…It is thought that the surface coating prevented the painted specimens from deteriorating by comparing these results to the results of the retention ratios of the unpainted specimens. The surface coating seemed to reduce the effect of moisture because it is one of the key factors of deterioration for pultruded GFRP, such as the reduction of bending strength [13] and mass loss [14]. Note that five coupons were used for each test.…”

Section: Painted Specimensmentioning

confidence: 99%

Durability of Pultruded GFRP through Ten-Year Outdoor Exposure Test

2015

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Abstract:Pultrusion is an easy molding method of fiber-reinforced polymer (FRP) to obtain a long composite material with a uniform cross-section at relatively low cost. In some cases, pultruded FRPs are now used in bridges and deck projects. Since the application of pultruded FRP as a structural material is increasing, a study on the durability of pultruded FRP under outdoor conditions is necessary in terms of safety. Some studies have shown that pultruded glass fiber-reinforced polymer (GFRP) exhibits a slight reduction in mechanical properties during outdoor exposure. Since pultruded GFRP consists of multi-layers, the change of mechanical properties in each layer is important to understand. In this study, an outdoor exposure test on pultruded GFRP for 10 years was conducted with three types of pultruded GFRP, which have different laminate systems, including surface-coated specimens of each type. Changes of strength and elastic modulus due to outdoor exposure were discussed with a focus on the contribution of each layer based on the rule of mixtures.

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Section: Painted Specimensmentioning

confidence: 99%

Durability of Pultruded GFRP through Ten-Year Outdoor Exposure Test

2015

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“…Compared with CFRP, GFRP has notable advantages (Nishizaki and Meiarashi, 2002;Bousias et al, 2004;Huang et al, 2005a;2005b;Gadve et al, 2009). …”

Section: Aim and Scopementioning

confidence: 99%

Mechanical behavior of concrete filled glass fiber reinforced polymer-steel tube under cyclic loading

Zhu

Zhao

Gao

et al. 2013

J. Zhejiang Univ. Sci. A

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Abstract:The mechanical behavior of concrete-filled glass fiber reinforced polymer (GFRP)-steel tube structures under combined seismic loading is investigated in this study. Four same-sized specimens with different GFRP layout modes were tested by a quasi-static test system. Finite element analysis (FEA) was also undertaken and the results were presented. Results of the numerical simulation compared well with those from experimental tests. Parametric analysis was conducted by using the FE models to evaluate the effects of GFRP thickness, axial compression rate, and cross sectional steel ratio. The experimental and numerical results show that the technique of GFRP strengthening is effective in improving the seismic performance of traditional concrete-filled steel tubes, with variations related to different GFRP layout modes.

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“…Preliminary studies presented by Schutte (1994), Bank et al (1995, Chin et al (1997), Gentry et al (1998), Kellogg et al (1999), Liao et al (1999), Abeele et al (2001), Nishizaki and Meiarashi (2002), Karbhari and Zhang (2003) and Robert et al (2010) have involved the measurement of one or more property of flexural and tensile moduli and strengths, and fatigue resistance. Each study used a different accelerated aging condition, with a constant temperature in the range -50°C to 80°C; and immersion in water, or salt solution, or acetic acid, or ammonia; for a period of time from 12 hours up to 2 years.…”

Section: Long-term Durability and Accelerated Agingmentioning

confidence: 99%

“…The study by Nishizaki and Meiarashi (2002) is of particular relevance to the authors' work as their exposure conditions included soaking coupons in water at the elevated temperatures of 40 o C, 50 o C and 60 o C. The pultruded material had a matrix with a vinyl ester resin, which is known (Anonymous 2011a, b) to possess a greater resistance to chemical agents and temperature than when the matrix resin is a filled isophthalic polyester. Measurement of weight change (gain, which can be followed by a loss) and characterization of the material using chemical analysis methods showed how the material was degrading with time.…”

Section: Long-term Durability and Accelerated Agingmentioning

confidence: 99%

“…After preparation, the specimens were immersed under tap water in a Grant SUB36 water tank and aged for 3000 hours at a constant temperature of 40 o C. The full surface of the semi-circular notch was in contact with the warm water for the duration of the aging process, which, earlier in this paper, has been estimated to be 1.6 years of service life, in the UK. The moderately elevated temperature of 40°C was selected because, at higher temperatures, another material degradation mechanism can amplify the property loss leading to a conservative determination of the actual long-term reduction (Nishizaki and Meiarashi 2002). It is noteworthy that should shapes of 1525 series material be constantly exposed at the moderated elevated temperature of 38 o C (100 o F)…”

Section: Materials and Hot-wet Conditioning For Aged Specimensmentioning

confidence: 99%

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