“…was reported in literature for aging of fiber reinforced polymer composites. 54–58 Figure 6.Optical images and scanning electron microscopic images of fracture surface of as-received and aged CIPP specimens.…”
Section: Resultsmentioning
confidence: 99%
“…was reported in literature for aging of fiber reinforced polymer composites. [54][55][56][57][58] Effect of aging on viscoelastic properties of CIPP liners…”
Section: Effect Of Aging On Interlaminar Shear Strength Of Cipp Linersmentioning
Ultraviolet light cured-in-place pipe is a popular trenchless rehabilitation technology used to repair existing buried pipelines without soil excavation. A polymer composite liner is manufactured directly in the field. After curing is complete, the new liner is placed in service to convey flowing water. Long-term water exposure has the potential to degrade the fiber reinforced cured-in-place pipe liners. Like other composites, liner hygrothermal stability could be a major challenge, especially for undercured materials. The objective of this study was to investigate the effect of aggressive environmental conditions such as water, salt solution, and simulated concrete pore solution at 50℃ on cured-in-place pipe liner mechanical and thermo-mechanical performance. Liners were exposed to aqueous solutions ranging from a typical exposure environment to a very aggressive alkaline environment. Cured-in-place pipe liner samples were collected from New York storm sewer installation sites. Specimens were assessed for the degree of curing as determined by differential scanning calorimetry and TGA. Samples were then immersed in aforementioned solutions for investigating the stability of the liners as a function of degree of cure. Both interlaminar shear strength and thermo-mechanical properties significantly differed based on the degree of cure. Cured-in-place pipe liner mechanical and thermo-mechanical properties were significantly impacted by water, salt, and pore solutions exposure. Long-term exposure to salt and alkaline environments may have a detrimental effect on the performance of cured-in-place pipe liners and desires additional scrutiny.
“…was reported in literature for aging of fiber reinforced polymer composites. 54–58 Figure 6.Optical images and scanning electron microscopic images of fracture surface of as-received and aged CIPP specimens.…”
Section: Resultsmentioning
confidence: 99%
“…was reported in literature for aging of fiber reinforced polymer composites. [54][55][56][57][58] Effect of aging on viscoelastic properties of CIPP liners…”
Section: Effect Of Aging On Interlaminar Shear Strength Of Cipp Linersmentioning
Ultraviolet light cured-in-place pipe is a popular trenchless rehabilitation technology used to repair existing buried pipelines without soil excavation. A polymer composite liner is manufactured directly in the field. After curing is complete, the new liner is placed in service to convey flowing water. Long-term water exposure has the potential to degrade the fiber reinforced cured-in-place pipe liners. Like other composites, liner hygrothermal stability could be a major challenge, especially for undercured materials. The objective of this study was to investigate the effect of aggressive environmental conditions such as water, salt solution, and simulated concrete pore solution at 50℃ on cured-in-place pipe liner mechanical and thermo-mechanical performance. Liners were exposed to aqueous solutions ranging from a typical exposure environment to a very aggressive alkaline environment. Cured-in-place pipe liner samples were collected from New York storm sewer installation sites. Specimens were assessed for the degree of curing as determined by differential scanning calorimetry and TGA. Samples were then immersed in aforementioned solutions for investigating the stability of the liners as a function of degree of cure. Both interlaminar shear strength and thermo-mechanical properties significantly differed based on the degree of cure. Cured-in-place pipe liner mechanical and thermo-mechanical properties were significantly impacted by water, salt, and pore solutions exposure. Long-term exposure to salt and alkaline environments may have a detrimental effect on the performance of cured-in-place pipe liners and desires additional scrutiny.
“…A sua baixa suscetibilidade à efeitos corrosivos permite que estas estruturas sejam utilizadas em ambientes de condições adversas, em que materiais convencionais sofrem maior efeito negativo. Dentre esses ambientes se destacam ambientes salinos e alcalinos, além de ambientes contendo águas residuárias [11].…”
O desempenho, eficiência, resiliência e sustentabilidade de uma estrutura são parâmetros fundamentais para promover a qualidade de vida e desenvolvimento econômico de uma infraestrutura. Atualmente, as patologias como corrosão são problemas sérios que oneram os cofres públicos e o consumidor final, além de gerar maiores importunos ao longo do tempo. Por isso, o emprego de materiais alternativos e de alto desempenho ganham cada vez mais atenção, devido à alta complexidade de gerenciamento, manutenção e adaptação resiliente às mudanças sociais, climáticas, poluição acentuada, diminuição dos recursos financeiros e entre outras durante todo o seu ciclo de vida da infraestrutura. Portanto, as barras de GFRP (Glass-Fiber-Reinforced Polymer) ganham evidência por serem inertes a corrosão, sendo empregada como uma ferramenta de reparo, manutenção e emprego em novas obras civis. Esse material associado a tecnologia, possibilita a redução de custo e melhoria no comportamento da estrutura. O plano de fundo deste artigo é de fomentar estudos futuros, vislumbrando desenvolver uma norma brasileira de dimensionamento de concreto armado (CA) GFRP. O domínio deste assunto aos profissionais, gestores e envolvidos na concepção e implementação de sistemas de infraestrutura e obras civis é fundamental, pois permite um planejamento sistêmico, otimizado e coerente as necessidades, minimizando custos, mas sem comprometer a qualidade da estrutura.
“…Therefore for avoiding cluster phenomena of nano particles, the nano fluid is again steering by a magnetic stirrer for 5 hours followed by sonication of 1 hour. A similar procedure was adopted by Nayak et al [41]. All three samples were kept in each type of fluid for 90 days.…”
Section: (3)mentioning
confidence: 99%
“…Up to 1 to 100 m/min of crosshead velocity, inter-laminar shear stress was increasing while beyond 100 m/min the inter-laminar shear stress was decreasing. In another work, Nayak et al [41] found that the addition of nano alumina filler (1 % weight) was beneficial as the flexural strength of the composite was increased by 12%, inter-laminar shear stress increased by 11% and the seawater coefficient was decreased by 175 compared to the simple glass fiber composite. According to Wang et al [42] chemically treated jute fibers composites attributed the enhanced properties like tensile strength, void-fraction, and interfacial adhesion compared to raw jute composites.…”
In recent years, the addition of nano and micro size filler material for fabricating composite materials are emerging concepts through which mechanical properties of the composite can be enhanced. Filler based hybrid polymer composite materials are substituting metallic materials because of their low specific wear rate, high specific strength modulus, and less water absorption. In current work, nano and micro Al2O3 filler based Glass-Jute hybrid composite have been fabricated to study the mechanical properties like hardness, impact test, specific wear rate, and flexural strength for each type of composite sample. Water absorption analysis is also carried under three different fluid media namely normal water, river water and de-ionized water-based Al2O3 nanofluid. Nano filler enriched composite attributed the higher magnitudes of hardness, impact strength, flexural strength and lower value of specific wear rate and water absorption compared to micro and normal composites. However, a nanofiller based composite is more suitable for automotive, aerospace and ship manufacturing industries.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
