Tensile Properties of GFRP Bars after Exposure to Harsh Laboratory and Field Environmental Conditions

2011 ◽  
Vol 250-253 ◽  
pp. 3738-3742 ◽  
Author(s):  
Saleh Alsayed ◽  
Tarek Almusallam ◽  
Yousef Al-Salloum ◽  
Sherif El-Gamal
Keyword(s):  
Tensile Properties ◽  
Environmental Conditions ◽  
Sea Water ◽  
Tap Water ◽  
Harmful Effect ◽  
Tensile Tests ◽  
Field Conditions ◽  
Maximum Effect ◽  
Test Results ◽  
Gfrp Bars

This paper presents the test results of an experimental study that investigates the durability of a new generation of Glass Fiber Reinforced Polymer (GFRP) bars. A total of 60 GFRP bars were embedded in concrete prisms and exposed to ten environmental conditions for 6 and 12 months. The environments included exposure to ordinary tap water, sea water, and alkaline solution at two temperatures (room and 50°C). The environments also included two typical field conditions of the Kingdom of Saudi Arabia (Gulf area and Riyadh area). The performance of the GFRP bars was evaluated by conducting tensile tests on the bars extracted out of the concrete specimens after exposure to the environmental conditions. After 12 months of exposure, the test results showed that the tap water at 50°C had the maximum effect on the tensile strength of the GFRP bars. The two field conditions did not show any harmful effect on the tensile properties of the bars after 12 months of exposure.

The Effects on Tensile Properties of Different Winding Way on GFRP Bar

2013 ◽  
Vol 438-439 ◽  
pp. 357-360
Author(s):  
Yu Yang Pang ◽  
Pu Zhang ◽  
Dan Ying Gao ◽  
Fei Mo
Keyword(s):  
Tensile Strength ◽  
Tensile Properties ◽  
Modulus Of Elasticity ◽  
Tensile Tests ◽  
Test Results ◽  
Shear Properties ◽  
Gfrp Bars ◽  
Ultimate Elongation ◽  
Gfrp Bar ◽  
Gfrp Reinforcement

The influence of different surface forms on GFRP reinforcement mainly manifest in bonding between reinforcement materials and concrete, especially when the GFRP bars are used in slope, the form of the surface of GFRP bar will affect reinforced materials torsion and shear properties directly. This article made some tensile tests on several different surface forms of GFRP reinforcement, and learned that the form of the surface wound of GFRP bar make the influence on tensile strength, ultimate elongation and modulus of elasticity. Test results show that the surface of the winding way will affect on the tensile strength, ultimate elongation and modulus of elasticity of GFRP bar.

Effect of harsh environmental conditions on the tensile properties of GFRP bars

2013 ◽  
Vol 45 (1) ◽  
pp. 835-844 ◽  
Author(s):  
Yousef A. Al-Salloum ◽  
Sherif El-Gamal ◽  
Tarek H. Almusallam ◽  
Saleh H. Alsayed ◽  
Mohammed Aqel
Keyword(s):  
Tensile Properties ◽  
Environmental Conditions ◽  
Gfrp Bars

scholarly journals Effect of Fibers Configuration and Thickness on Tensile Behavior of GFRP Laminates Exposed to Harsh Environment

Polymers ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1401 ◽  
Author(s):  
Bazli ◽  
Ashrafi ◽  
Jafari ◽  
Zhao ◽  
Raman ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Tensile Properties ◽  
Uv Radiation ◽  
Environmental Conditions ◽  
Prediction Models ◽  
Tensile Tests ◽  
Vapor Condensation ◽  
Moisture Condition ◽  
Freeze Thaw ◽  
Chopped Strand Mat

The present study indicates the importance of using glass fiber reinforced polymer (GFRP) laminates with appropriate thickness and fibers orientation when exposed to harsh environmental conditions. The effect of different environmental conditions on tensile properties of different GFRP laminates is investigated. Laminates were exposed to three environmental conditions: (1) Freeze/thaw cycles without the presence of moisture, (2) freeze/thaw cycles with the presence of moisture and (3) UV radiation and water vapor condensation cycles. The effect of fiber configuration and laminate thickness were investigated by considering three types of fiber arrangement: (1) Continuous unidirectional, (2) continuous woven and (3) chopped strand mat and two thicknesses (2 and 5 mm). Microstructure and tensile properties of the laminates after exposure to different periods of conditioning (0, 750, 1250 and 2000 h) were studied using SEM and tensile tests. Statistical analyses were used to quantify the obtained results and propose prediction models. The results showed that the condition comprising UV radiation and moisture condition was the most aggressive, while dry freeze/thaw environment was the least. Furthermore, the laminates with chopped strand mat and continuous unidirectional fibers respectively experienced the highest and the lowest reductions properties in all environmental conditions. The maximum reductions in tensile strength for chopped strand mat laminates were about 7%, 32%, and 42% in the dry freeze/thaw, wet freeze/thaw and UV with moisture environments, respectively. The corresponding decreases in the tensile strength for unidirectional laminates were negligible, 17% and 23%, whereas those for the woven laminates were and 7%, 24%, and 34%.

scholarly journals GROWTH AND MINRAL STATUS OF COTTON PLANTS AS AFFECTED BY ABSICISIC ACID AND SALT STRESS

2020 ◽  
Vol 6 (5) ◽  
pp. 142-153
Author(s):  
Safaa A. Mahmoud ◽  
Hussein M.M. ◽  
A.S. Taalab ◽  
Hanan S. Siam
Keyword(s):  
Cotton Plant ◽  
Salinity Stress ◽  
Sea Water ◽  
Tap Water ◽  
Harmful Effect ◽  
Foliar Spray ◽  
Dry Weight ◽  
Control Treatment ◽  
Cotton Plants ◽  
Salinity Levels

Application of antioxidant materials like absicisic acid to alleviate salinity stress and promote cotton growth is high effectiveness target, whereas cotton plant is an attractive industrial crop. Pot experiment was conducted to evaluate the effect of salinity stress and absicisic acid (antioxidant materials to alleviate salinity stress) on cotton growth and macro nutrients status in shoots of cotton plants. Plants subjected to two salinity levels (2500 and 5000 ppm as diluted sea water), and tap water (250ppm) as control, sprayed absicisic acid (ABA) with two concentrations (20 and 40 ppm of ABA) and distilled water as a control. Salinity decreased stem and leaves dry weight compare to the control treatment. The lower concentrations of ABA (20 and 40 ppm as a foliar spray) improve dry weight of stem and leaves. Reversely, leaves/stem ratio decreased with both concentrations of the absicisic acid. The increment in dry weight of leaves and stem or their sum showed its higher values by application 40 ppm from ABA under the 5000 ppm salinity level and also under fresh water treatment but under the 2500 ppm treatment the highest values were by 20 ppm of growth regulator. Nevertheless, L/S ratio decreased by ABA treatment, whereas, the high concentration of ABA (40ppm) was super than lower concentration (20ppm) under both salinity levels. Generally, it can be used diluted seawater in irrigation of cotton plant with spraying abscisic acid to alleviate the harmful effect of salinity.

scholarly journals Effect of seawater on the properties of Epoxy Modified Concrete

2010 ◽  
Vol 1 (2) ◽  
pp. 1-8 ◽  
Author(s):  
Timmy Jupiter ◽  
Azida Hj Rashidi ◽  
Idawati Ismail
Keyword(s):  
Sea Water ◽  
Cement Content ◽  
Tap Water ◽  
Weight Ratio ◽  
Common Type ◽  
Test Results ◽  
Cement Concrete ◽  
Short Term ◽  
Concrete Material ◽  
Physical Changes

Epoxy is the most common type of polymer used by civil engineers to produce Polymer Cement Concrete (PCC). In this study, the effect of seawater on epoxy modified mortar in the Malaysian seawater is investigated using PCC mixes with Epoxy is used as the cement replacement. Fifteen 100x100x100 mm standard cubes were casted from five different mixes. The samples range from 5% to 50% epoxy replacement to cement content by weight ratio. Samples were placed in sea water and tap water for 100 days and monitored for short-term durability aspects such as physical changes in weight, appearances and absorption percentages. Compressive strength for 7, 14, 28 and 100 days were also taken. Results were compared with control samples having 0% epoxy. Results show that the strength of samples depends on the amount of epoxy used. The absorption test results can be an initial indicator to the durability properties of concrete material. It was also found that PCC with 20% epoxy can effectively reduce overall deterioration of concrete especially those exposed to sea water.

scholarly journals Experimental Investigation for Tensile Performance of GFRP-Steel Hybridized Rebar

2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
Dong-Woo Seo ◽  
Ki-Tae Park ◽  
Young-Jun You ◽  
Sang-Yoon Lee
Keyword(s):  
Elastic Modulus ◽  
Concrete Structures ◽  
Tensile Tests ◽  
Test Results ◽  
Building Technology ◽  
Gfrp Bars ◽  
Low Elastic Modulus ◽  
Tensile Performance ◽  
The Individual

Tensile performance of the recently developed “FRP Hybrid Bar” at Korea Institute of Civil Engineering and Building Technology (KICT) is experimentally evaluated by the authors. FRP Hybrid Bar is introduced to overcome the low elastic modulus of the existing GFRP bars to be used as a structural member in reinforced concrete structures. The concept of material hybridization is applied to increase elastic modulus of GFRP bars by using steel. This hybridized GFRP bar can be used in concrete structures as a flexural reinforcement with a sufficient level of elastic modulus. In order to verify the effect of material hybridization on tensile properties, tensile tests are conducted. The test results for both FRP Hybrid Bar and the existing GFRP bars are compared. The results indicate that the elastic modulus of FRP Hybrid Bar can be enhanced by up to approximately 250 percent by the material hybridization with a sufficient tensile strength. To ensure the long-term durability of FRP Hybrid Bar to corrosion resistance, the individual and combined effects of environmental conditions on FRP Hybrid Bar itself as well as on the interface between rebar and concrete are currently under investigation.

CARLSON ALLOY 90 10 CuNi

Alloy Digest ◽  
1995 ◽  
Vol 44 (5) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Sea Water ◽  
General Corrosion ◽  
Good Resistance

Abstract 90-10 Cupro-nickel is a highly ductile, malleable and corrosion resisting alloy, suitable for water applications. The alloy has approximately 1.4% iron to improve its resistance to sea water. It has good resistance to general corrosion and erosion. Easily fabricated. Readily weldable. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance. Filing Code: CU-600. Producer or source: G.O. Carlson Inc.

IN-838

Alloy Digest ◽  
1975 ◽  
Vol 24 (5) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Nickel Alloy ◽  
Sea Water ◽  
Heat Treating ◽  
Chromium Addition

Abstract IN-838 is a wrought copper-15% nickel alloy with a controlled chromium addition for improved corrosion resistance in flowing sea water. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-297. Producer or source: Brass mills.

LUMEN ALLOY 9

Alloy Digest ◽  
1957 ◽  
Vol 6 (12) ◽  
Keyword(s):  
Fracture Toughness ◽  
Compressive Strength ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Sea Water ◽  
Heat Treating

Abstract UMEN ALLOY 9 is a manganese bronze having excellent combination of strength and corrosion resistance in fresh and sea water. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive strength as well as fracture toughness and fatigue. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Cu-57. Producer or source: Lumen Bearing Company.

VLX 954

Alloy Digest ◽  
1995 ◽  
Vol 44 (4) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Austenitic Stainless Steel ◽  
Physical Properties ◽  
Tensile Properties ◽  
Sea Water ◽  
Heat Treating ◽  
Localized Corrosion ◽  
Temperature Performance

Abstract VLX 954 is an austenitic stainless steel with 6% (nominal) molybdenum. The alloy is particularly resistant to localized corrosion in sea water and chloride environments. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-589. Producer or source: DMV Stainless USA Inc.

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