New Procedure to Evaluate the Post-Crack Behavior of Fiber-Reinforced Concrete

2019 ◽  
Vol 2673 (11) ◽  
pp. 573-582
Author(s):  
Bryce Hansen ◽  
Manik Barman
Keyword(s):  
Reinforced Concrete ◽  
Cross Section ◽  
Fiber Reinforced Concrete ◽  
Lateral Stiffness ◽  
Fiber Reinforced ◽  
Testing Methods ◽  
Crack Behavior ◽  
Different Types ◽  
Transportation Agencies

This study attempted to identify the challenges in testing and characterization of the post-crack behavior of structural fiber-reinforced concrete (FRC) for use in pavements. The benefits and challenges associated with three different FRC testing methods, ASTM C1550, C1399, and C1609 were discussed and compared. Two new parameters, post-crack toughness, and post-crack performance (PCP) index were proposed to characterize the post-crack behavior of FRC. These parameters are a function of the fibers’ contribution and are minimally influenced by the properties of the non-fiber ingredients of concrete such as aggregates, cement, and water. A laboratory study conducted on 10 different types of FRCs validated the applicability of the two proposed new parameters. Transportation agencies can use the PCP index to shortlist effective fibers and post-crack toughness to determine fiber dosage. The study found that fibers with irregular cross-section or geometry and high lateral stiffness provide a high post-crack contribution.

scholarly journals ANALYSIS OF PROPERTIES OF CONCRETE USING STEEL FIBERS AS FIBER REINFORCEMENT ADMIXTURE

2017 ◽  
Vol 5 (4RASM) ◽  
pp. 59-62
Author(s):  
Vishal Gadgihalli ◽  
Meena ◽  
Sindu ◽  
Raghavendra Prasad Dinakar
Keyword(s):  
Reinforced Concrete ◽  
Flexural Strength ◽  
Steel Fibre ◽  
Fiber Reinforcement ◽  
Paper Analysis ◽  
Fiber Reinforced Concrete ◽  
Steel Fibers ◽  
Fiber Reinforced ◽  
Different Types ◽  
Discrete Uniform

Fiber reinforced concrete is composite material consisting of mixtures of cement, mortar or concrete, discontinuous discrete uniform dispersed suitable fibers. Fiber reinforced concrete are of different types and properties. In this paper analysis of properties of concrete using steel fibre as fiber reinforcement admixture is studied and verified the strength of concrete to normal plane concrete with absence of admixtures. Using steel fibers as fiber reinforcement admixture increases bond strength by enhancing surface tension as steel is better in taking flexural strength this gives better results, hence we can use this steel fiber reinforcement to concrete where the compressive and flexural strength place a crucial role in construction and maintenance.

scholarly journals Experimental Research on Deep Beam using Hybrid Fiber Reinforced Concrete with M-Sand

2020 ◽  
Vol 9 (9) ◽  
pp. 305-308
Keyword(s):  
Reinforced Concrete ◽  
High Performance ◽  
Research Work ◽  
Fiber Reinforced Concrete ◽  
Polypropylene Fibers ◽  
Deep Beam ◽  
Fiber Reinforced ◽  
Fresh Properties ◽  
Hybrid Fiber ◽  
Different Types

Concrete is hard but liable to break easily. Hybrid fiber reinforced concrete offers several economical and technical benefits. The use of fibers extends its possibilities. The hybridization of different types of fibers may play important roles in arresting cracks and thus achieve high performance of concrete. The main reason for adding glass ,steel and polypropylene to improve the ductility of concrete.The present research work is aimed at studying, the deep beam using three different types of fibers such as glass 0.3%, steel 0.75% & 1% and polypropylene fibers 0.3% were added to volume of concrete. The mix design has been arrived based on IS code method for M20 grade of concrete. An investigation is carried out to evaluate the fresh Properties and mechanical Properties of Hybrid Fiber Reinforced Concrete (HFRC). The result shows that hybrid fiber reinforced deep beams achieved better performance than the ordinary RC deep beam under application of load.

scholarly journals New Methodological Approach Towards a Complete Characterization of Structural Fiber Reinforced Concrete by Means of Mechanical Testing Procedures

2020 ◽  
Author(s):  
Marcos G. Alberti ◽  
Alvaro Picazo ◽  
Jaime C. Gálvez ◽  
Alejandro Enfedaque
Keyword(s):  
Reinforced Concrete ◽  
Complete Characterization ◽  
Fiber Reinforced Concrete ◽  
Bending Test ◽  
Fiber Reinforced ◽  
Shear Tests ◽  
Bending Tests ◽  
Testing Procedures ◽  
Video Extensometry

This work proposes a novel methodology for the complete characterization of fiber reinforced concrete (FRC). The method includes bending tests of prismatic notched specimens, based on the Standards for FRC, tensile and pure shear tests. The values adopted by the standards for designing FRC are the obtained from bending tests, typically fR3, even for shear and pure tension loading. This paper shows that the remaining strength of FRC, supplied by the fibers, depends on the type of loading. In the case of shear and tensile loading the prescriptions of the standards may be unsafe. In this work, the remaining halves of specimens subjected to bending test are prepared and used for shear and tension tests. This means significant savings in specimen preparation and a greater amount of information for structural use of FRC. The results provide relevant information for the design of structural elements of FRC compared with the only use of data supplied by bending tests. In addition, a video-extensometry system was used to analyze the crack generation and cracking patterns. The video-extensometry applied to shear tests allowed the assessment of the sliding values and crack opening values at the crack discontinuity. These values may be quite relevant for the study of the FRC behavior when subjected to shear according to the shear-friction model theories.

scholarly journals Near Surface Characteristic: Hybrid Fiber Reinforced Concrete With Different Aspect Ratio

2019 ◽  
Vol 8 (3) ◽  
pp. 1025-1028
Keyword(s):  
Reinforced Concrete ◽  
Aspect Ratio ◽  
Water Absorption ◽  
Surface Characteristics ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Near Surface ◽  
Aspect Ratios ◽  
Different Types

The present work is enhancement of near surface characteristics for hybrid fiber reinforced concrete (aspect ratio 40+100). Here in this research work an attempt has made to study water absorption values for different types of fiber reinforced concrete, which are having different aspect ratios like 40, 100 and 40+100. Concrete mix along with fibers are casted and cured for 28days. Both water absorption test and sorptivity tests carried on hardened concrete. The main objective is to check variation in absorption values due to addition of different types of fibers. Here totally five different types of fibers are considered like steel fiber, Galvanized iron fibres, High density polyethylene fibres, waste plastic fiber and polypropylene fibers Experimental investigation shows that except polyprolene hybrid mix concrete other hybrid mixes has showed good results. But as compared to mono fiber reinforced concrete hybrid fiber reinforced concrete has showed better results. This research was aimed to provide benchmark for future research works on near surface characteristics of hybrid fiber reinforced concrete.

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