Durability and Long-Term Performance of Fiber-Reinforced Polymer as a New Civil Engineering Material

This paper presents calibration of service temperature on the prediction of long-term performance of GFRP bar in reinforced concrete structures. Two approaches, based on monthly average temperature and yearly average temperature are proposed to simulate the real service condition on the RC structure for the study on long-term performance. A design example for the comparison of results by the two approaches is presented.

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An Investigation of Environmental Reduction Factor for GFRP Bar Used as Concrete Reinforcement in China

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.413.399 ◽

2011 ◽

Vol 413 ◽

pp. 399-403 ◽

Cited By ~ 1

Author(s):

Jian Wei Huang

Keyword(s):

Reduction Factor ◽

Fiber Reinforced Polymer ◽

Rc Structures ◽

Average Temperature ◽

Reinforced Polymer ◽

Gfrp Bar ◽

Temperature Records ◽

Long Term Performance ◽

Term Performance

Currently, an environmental reduction factor (ERF) is incorporated in design codes/guidelines of Fiber Reinforced-Polymer (FRP) in reinforced concrete (RC) structures to account for the FRP long-term durability. Due to the lack of real time durability data, justification of the ERF is still necessitated. This paper presents a calibration of ERF for GFRP bar to be used in China on the basis of the prediction of GFRP long-term performance with monthly average temperature records from 32 major cities. Research results show that the ERF values vary from 0.49 to 0.58 at 100% R.H. exposure, while ERFs are greater than 0.70 for all cases being studied when R.H. is below 90%. On the basis of this study, ERF can be recommended as of 0.70 and 0.50 for application with R.H. <90% and moisture saturated exposures, respectively.

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Experimental Study on the Behavior of Glass Fiber Reinforced Rebars

International Journal for Research in Applied Science and Engineering Technology ◽

10.22214/ijraset.2021.38461 ◽

2021 ◽

Vol 9 (10) ◽

pp. 600-602

Author(s):

Praveen Kumar

Keyword(s):

Tensile Strength ◽

Glass Fiber ◽

Civil Engineering ◽

Cement Industry ◽

Fiber Reinforced Polymer ◽

Fiber Reinforced ◽

Engineering Material ◽

Cement Production ◽

Reinforced Polymer ◽

Glass Fiber Reinforced

Abstract: As we know Plain Concrete has limited ductility, strength in tension as well as low cracking resistance. Micro cracks are present in concrete and these propagates at a great extent and results in extensive brittle fracture. Experiments in past and numerous researches in the last decade were focused merely on developing novel techniques of improving tensile strength of concrete. Among these mostly used is GFRP (Glass Fiber Reinforced Polymer) is easily available, which is low in cost than CFRP (Carbon Fiber Reinforced Polymer), and that’s why various studies is done to strengthening of concrete by using GFRP particularly in countries like India. GF is latest introduction cum revolution in production FRC. It overpowers all the synthetic fibers, due to its excellent strength, extreme durability, supreme wear-tear resistance and exceptional tensile and impact strength. At this time GFRC (Glass Fiber Reinforced Concrete) excelled as a great remedy for civil engineers. Tensile strength of GFRC lies between 1024 and 4080 N/mm2 . It is the benefit of using glass fibers in reinforcement of concrete. Construction Industry is accelerating day-by-day. Today is the scenario of sky scrapping and complex infrastructures, which results in increasing demand of basic civil engineering material i.e. cement. Engineers are looking for alternative of expensive construction since long. Cement, binder in concrete, is an expensive and exorbitant civil engineering material and it increases the Constructional budget. Not only this, but also cement marks the highest consumption throughout the world after water. The carbon credits to the environment during cement production, is an alarming issue. If it keeps following the exact pace as today, it is probable to reach annual cement production up to about 600 metric tons by 2025 in India alone and the globe will change into hot air balloon. Cement industry alone contribute to 2.4% to the total carbon emissions round the globe. To eradicate this converse effect of cement industry on the environment, engineers are working hard to find efficient substitutes which are in-expensive, eco-friendly and can possess better cementing properties. Agricultural and commercial wastes are the best choice and have the characteristics favouring their utilization in concrete production. These by-products are complete waste and if re-used in any sort releases a huge burden from environment. Keywords: Glass Fiber, Workability, Compressive strength, Compaction factor, Slump test

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Effects of Adhesive Coating on the Hygrothermal Aging Performance of Pultruded CFRP Plates

Polymers ◽

10.3390/polym12020491 ◽

2020 ◽

Vol 12 (2) ◽

pp. 491

Author(s):

Xinkai Hao ◽

Guijun Xian ◽

Xiangyu Huang ◽

Meiyin Xin ◽

Haijuan Shen

Keyword(s):

Alkaline Solution ◽

Fiber Reinforced Polymer ◽

Absorption Mechanism ◽

Reinforced Polymer ◽

Long Term Performance ◽

Term Performance ◽

Positive Effect ◽

Adhesive Coating ◽

Temperature Water

Bonding of carbon fiber reinforced polymer (CFRP) plates to a concrete member is a widely used strengthening method. CFRP plates used in construction degrade due to harsh environmental conditions such as high temperature or alkaline solution seepage from concrete. However, the adhesive between CFRP plates and concrete may have a positive effect on the durability performance of CFRP plates. In this paper, the long-term performance of both naked and adhesive coated CFRP pultruded plates subjected to different-temperature water or alkaline solution (20, 40 and 60 °C) are investigated to evaluate the protective effect of adhesive on CFRP plates. It is found that the adhesive coating can slow the deterioration of mechanical properties especially the tensile properties and fiber-matrix interfacial properties. The water absorption mechanism of CFRP plates was also investigated.

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