Durability Gap Analysis for Fiber-Reinforced Polymer Composites in Civil Infrastructure

Karbhari, Vistasp M.; Chin, Jik; Hunston, Donald L.; Benmokrane, Brahim; Juska, Thomas; Morgan, Roger J.; Lesko, John J.; Sorathia, Usman; Reynaud, D R.

doi:10.1061/(asce)1090-0268(2003)7:3(238)

Cited by 397 publications

(172 citation statements)

References 38 publications

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“…Grace and Singh (2005) found that 33% of can be lost if the specimen is exposed to long-term relative humidity of 100%. Karbhari et al (2003) performed a gap analysis, which confirmed this finding, showing that exposure to moisture can have deleterious effects on the fiber-matrix bond due to wicking along the interface. Sen et al (2001) investigated the effects of moisture exposure combined with thermal changes for CFRP bonded to concrete slabs over a period of 17 months.…”

Section: Moisture Effects On Surface Bonded Frpmentioning

confidence: 52%

Environmental Durability of Reinforced Concrete Deck Girders Strengthened for Shear with Surface Bonded Carbon Fiber-Reinforced Polymer

Higgins¹,

Dawson²,

Mitchell³

et al. 2009

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Sponsoring Agency Code Supplementary Notes AbstractThis research investigated the durability of carbon fiber-reinforced polymer composites (CFRP) used for shear strengthening reinforced concrete deck girders. Large beams were used to avoid accounting for size effects in the data analysis. The effort included determining the role of freeze-thaw, moisture, and fatigue on structural performance and developing analytical design procedures that account for durability.The results showed that moisture infiltration behind the CFRP, combined with freeze-thaw, was critical in reducing shear panel stiffness and shear capacity. Long-term moisture exposure alone produced only a minor decrease in shear capacity. Freeze-thaw, combined with fatigue, had little effect on shear capacity if water infiltration was minimized. Fatigue caused some debonding, but the debonding was not significant enough to affect capacity.Use of ACI-318 with ACI 440 provided conservative predicted shear strengths after environmental exposure. However, the ACI approach did not provide uniform levels of safety because the observed conservatism was built into the prediction for the unstrengthened base specimens but not for the CFRP contribution. Consequently, a recommendation of the research is to apply the environmental exposure factor at the final design step to limit the effective CFRP stress/strain. For locations with very large numbers of wet freeze-thaw cycles and extended exposure to continuous moisture, the environmental reduction factors should be reduced even further. To better predict the CFRP bond strength demands that can occur due to shear-moment interaction, a further check of the design should be made beyond those required by ACI-440.17.

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Section: Moisture Effects On Surface Bonded Frpmentioning

confidence: 52%

Environmental Durability of Reinforced Concrete Deck Girders Strengthened for Shear with Surface Bonded Carbon Fiber-Reinforced Polymer

Higgins¹,

Dawson²,

Mitchell³

et al. 2009

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“…Sua durabilidade é definida pela dureza dos componentes como a fibra (ou flocos) de vidro, a matriz polimérica formada e interface com o metal. 22 A umidade, por exemplo, pode reduzir a resistência mecânica da fibra de vidro e, na resina pode aumentar sua plasticidade, iniciar microfissuras ou causar inchamento. 23,24 As propostas comerciais para revestimentos compósitos garantem maior durabilidade, boa estabilidade dimensional numa alta faixa de temperatura, alta força dielétrica e baixa permeabilidade.…”

Section: Revestimentosunclassified

The Corrosion and the Anticorrosion Agents

Frauches-Santos¹,

Albuquerque²,

Oliveira³

et al. 2014

Revista Virtual De Química

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Abstract:Corrosion is generally present in metal materials, especially when they are involved in several industrial activities. Their deterioration is induced by the physicochemical interaction between the metal and the corrosive environment, which causes great problems in several activities. The petrol sector is one of the most damaged as the constituents of perforation fluids and petroleum production water influence corrosion. Conventional anti-corrosion techniques are employed to prevent the loss of highly used industrial material; they include coatings, change of environment, cathodic and anodic protection and inhibitor treatments using organic compounds. Broadly speaking, this article describes the main anti-corrosion protection methods, corrosion in petroleum industry, and the anti-corrosion agents used in the industrial sector.Keywords: Corrosion; corrosion inhibitors; anti-corrosion protection; corrosion in petroleum industry. ResumoA corrosão está presente nos materiais metálicos em geral e, em especial, envolvidos nas diversas atividades industriais. A deterioração destes é causada pela interação físico-química entre o material e o meio corrosivo, onde causa grandes problemas nas mais variadas atividades. Um dos setores que mais se prejudica com a corrosão é o petrolífero devido a influencia de constituintes dos fluidos de perfuração e da água de produção. Para evitar as perdas dos materiais de elevado uso industrial, são utilizadas técnicas anticorrosivas que incluem os revestimentos, as técnicas de modificação do meio, a proteção catódica e anódica e, os inibidores de corrosão como a utilização de compostos orgânicos. Este artigo descreve, em linhas gerais, as principais técnicas de proteção anticorrosiva, a corrosão na indústria do petróleo e os agentes anticorrosivos utilizadas no meio industrial.Palavras-chave: Corrosão; inibidores de corrosão; proteção anticorrosiva; corrosão na indústria de petróleo.

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“…Their accelerated testing has the maximum aging temperature taken to be 0.8 of the (nominal) glass transition temperature (T g ) that can be based on data provided by Chateauminois et al (1995). It is noteworthy that for the purpose of design, it has been recommended by Karbhari, Chin, Hunston, Behnmokrane, Juska, Morgan, Lesko, Sorathia, and Reynaud (2003) T g is without aging in water, which is shown by Chateauminois et al (1995) to reduce the glass transition temperature.…”

Section: Long-term Durability and Accelerated Agingmentioning

confidence: 99%

Effect of Hot-Wet Aging on the Pin-Bearing Strength of a Pultruded Material with Polyester Matrix

Zafari

Mottram

2012

J. Compos. Constr.

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Durability Gap Analysis for Fiber-Reinforced Polymer Composites in Civil Infrastructure

Cited by 397 publications

References 38 publications

Environmental Durability of Reinforced Concrete Deck Girders Strengthened for Shear with Surface Bonded Carbon Fiber-Reinforced Polymer

Environmental Durability of Reinforced Concrete Deck Girders Strengthened for Shear with Surface Bonded Carbon Fiber-Reinforced Polymer

The Corrosion and the Anticorrosion Agents

Effect of Hot-Wet Aging on the Pin-Bearing Strength of a Pultruded Material with Polyester Matrix

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