Evaluation of Synthetic Fiber Reinforced Concrete Pipe Performance Using Three-Edge Bearing Test

This paper evaluated mixed mode I/II fracture toughness of fiber-reinforced concrete using cracked semi-circular bend (SCB) specimens subjected to three-point bending test. Additionally, a comparison was made between the experimental results and the estimations made by different theoretical criteria. Natural and synthetic fibers at various concentrations were used in this study. After producing cracks in SCB specimens at different inclination angles to induce different mixed mode loading conditions (from pure mode I to II), the fracture toughness of SCB specimens was determined. Furthermore, the compressive, splitting tensile, and flexural strength of natural and synthetic fiber-reinforced concrete were measured after 7 and 28 days of curing. While there is an increase in the aforementioned strengths with fiber content increase, 0.3% was found to be the optimum percentage regarding fracture toughness for both fibers. Also, the comparison between the experimental and theoretical results showed that generalized maximum tangential stress criterion estimated the experimental data satisfactorily.

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A new test method for evaluating the long-term performance of fiber-reinforced concrete pipes

Advances in Structural Engineering ◽

10.1177/1369433219894243 ◽

2019 ◽

Vol 23 (7) ◽

pp. 1336-1349 ◽

Cited By ~ 1

Author(s):

Fouad T Al Rikabi ◽

Shad M Sargand ◽

Issam Khoury ◽

John Kurdziel

Keyword(s):

Finite Element ◽

Reinforced Concrete ◽

Steel Reinforcement ◽

Fiber Reinforced Concrete ◽

Synthetic Fiber ◽

Concrete Pipes ◽

Concrete Pipe ◽

Long Term Performance ◽

Term Performance

Synthetic fibers have been used recently to minimize the need for steel reinforcement in the concrete pipe to enhance their ductility. However, synthetic fiber has properties that may change over time due to its viscoelastic behavior. The objective of this study is to investigate the long-term performance of fiber-reinforced concrete pipes using a new test frame. A three-dimensional finite element model was created for the long-term testing frame to ensure its compliance with the American Society for Testing and Materials requirement. The finite element results showed that the testing frame successfully transferred the load to the concrete as the pipe cracked at the location where high flexural stresses are expected. Concrete pipe reinforced with synthetic fiber dosage of 9 kg/m3 along the steel reinforcement area of 5.7 cm2/m was tested to evaluate the concrete pipe system performance. The pipe was tested under two load stages for 120 days each. Load stages 1 and 2 included applying 40% and 70% of the ultimate load obtained by the authors in a previous study, respectively. The strain and deflection increased linearly within 5 days of applying the load and then leveled off. The pipe showed a slight increase in the crack width and deflection, indicating that fiber creep did not have a significant impact on the long-term performance of the concrete pipe. Also, it was observed that strain values surpassed those for plain concrete material, suggesting that including synthetic fiber in the concrete pipe mix enhanced the pipe ductility.

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Realistic Prediction of Post-Cracking Behaviour in Synthetic Fiber Reinforced Concrete Beams

Journal of the Korea Concrete Institute ◽

10.4334/jkci.2002.14.6.900 ◽

2002 ◽

Vol 14 (6) ◽

pp. 900-909 ◽

Cited By ~ 2

Keyword(s):

Reinforced Concrete ◽

Concrete Beams ◽

Fiber Reinforced Concrete ◽

Reinforced Concrete Beams ◽

Synthetic Fiber ◽

Fiber Reinforced ◽

Realistic Prediction

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Specification for Synthetic Fiber Reinforced Concrete Culvert, Storm Drain, and Sewer Pipe

10.1520/c1818-18 ◽

2018 ◽

Author(s):

Keyword(s):

Reinforced Concrete ◽

Fiber Reinforced Concrete ◽

Synthetic Fiber ◽

Fiber Reinforced ◽

Sewer Pipe ◽

Storm Drain

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Performance Evaluation of Steel Fiber-Reinforced Concrete Pipe under D-Loads

Pipelines 2013 ◽

10.1061/9780784413012.013 ◽

2013 ◽

Author(s):

Shawn R. Coombs ◽

John Kurdziel ◽

Derek Secrist

Keyword(s):

Performance Evaluation ◽

Reinforced Concrete ◽

Steel Fiber ◽

Fiber Reinforced Concrete ◽

Fiber Reinforced ◽

Steel Fiber Reinforced Concrete ◽

Concrete Pipe

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SCOPE OF IMPROVING MECHANICAL CHARACTERISTICS OF CONCRETE USING NATURAL FIBER AS A REINFORCING MATERIAL

Malaysian Journal of Civil Engineering ◽

10.11113/mjce.v32n2.654 ◽

2020 ◽

Vol 32 (2) ◽

Author(s):

Sristi Das Gupta ◽

MD Shahnewaz Aftab ◽

Hasan Mohammod Zakaria ◽

Chaity Karmakar

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Reinforced Concrete ◽

Fiber Reinforced Concrete ◽

Synthetic Fiber ◽

Jute Fiber ◽

Fiber Reinforced ◽

Plastic Shrinkage ◽

Shrinkage Cracks ◽

Reinforcing Material

Using natural (Jute) fiber in concrete as a reinforcing material can not only augment the concrete strength but also restrict the use of synthetic fiber which is environmentally detrimental. To achieve this goal, this study evaluated compressive strength, tensile strength and plastic shrinkage of concrete incorporating ‘Natural (Jute)’ fiber of different length (15 mm and 25 mm) with various mix proportions of 0.10%, 0.2%, 0.3% and 0.4% respectively by volume of concrete. Concrete is vulnerable to grow shrinkage cracks because of high evaporation rate in dry and windy conditions. Incorporating of fibers could abate development of this crack. The large length (25 mm) and higher content ( 0.3%) of reinforcing materials (jute fiber) result to the lowering of mechanical properties of JFRC compare to plain concrete. But in the incorporation of short (15 mm) and low fiber content ( 0.3%), enhances the mechanical properties of the same JFRC. Inclusion of 0.3% (15 mm length) fiber gave maximum enhancement of both concrete compressive and tensile strength by 12.4% and 58% respectively compared to the non-fiber reinforced concrete. A drastic suppression of crack occurrence and area of crack between non-fiber reinforced concrete and fiber reinforced concretes was attained. Experimental results of incorporating 0.1–0.4% fiber with 15 mm length in concrete revealed that plastic shrinkage cracks were decreased by 75–99% in contrast to non-fiber reinforced concrete. Therefore, it is concluded that the incorporation of jute fiber in making FRC composite would be one of the favorable methods to enhance the performance of concrete.

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