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Research Article

Fracture behavior of hybrid fiber reinforced normal strength and high strength concrete: comparison with plain and steel fiber reinforced concrete

P.N. Ojha, Pranay Singh, Brijesh Singh, Abhishek Singh

Centre for Construction Development and Research, National Council for Cement and Building Materials, India

Keywords

Abstract


HFRHSC;


Fracture;


Load-CMOD;


Three-point bend test

The paper presents an experimental investigation on the fracture behavior of hybrid-fiber reinforced normal strength concrete (HFRC) and hybrid-fiber reinforced high strength concrete (HFRHSC). The hybrid fiber used in the study constitutes of 0.75% steel fiber and 0.25% polypropylene fiber, by volume of the concrete. A three-point bend test on a notched beam has been performed based on the recommendations of RILEM as well as literature. Fracture parameters like the fracture energy, stress intensity factor, energy release rate and characteristic length has been evaluated from the load-deflection and load-CMOD curves. These were compared with values for the plain and steel fiber reinforced concrete reported in literature for similar type of mixes. Result suggests that hybrid fiber improved the fracture performance in comparison to the steel fiber reinforcement in case of normal strength concrete. For higher strength concrete, replacing steel fiber by hybrid fibers caused marginal reduction in the fracture parameters. Compared to plain unreinforced concrete, the fracture behaviour irrespective of the strength improved by addition of the hybrid fibers.

© 2022 MIM Research Group. All rights reserved.

LATEST News


27/12/2022 Reviewer Awards: The winners of 2022 reviewer awards of Research on Engineering Structures and Materials (RESM) are announced. More information can be found at Reviewer Awards section. 


23/12/2022 Best Paper Award: According to the Advisory Board decision, the paper authored by Nitin Kumar, Michele Barbato, Erika L. Rengifo-López and Fabio Matta entitled as “Capabilities and limitations of existing finite element simplified micro-modeling techniques for unreinforced masonry” is awarded the 2022 Best Paper Award of Research on Engineering Structures and Materials (RESM). 

23/12/2022 Most Cited Paper Award:  According to the Editorial Board evaluation, the paper authored by Aykut Elmas, Güliz Akyüz, Ayhan Bergal, Müberra Andaç and Ömer Andaç entitled as “Mathematical modelling of drug release" is awarded the 2022 Most Cited Paper Award of Research on Engineering Structures and Materials (RESM). 


13/04/2022 Fraudulent Emails Impersonating Our Journal: We noticed that some emails are sent to some people impersonating our journal staff as sender and requesting recipients to follow some links. Our journal and staff has nothing to do with these emails and please do not follow the given links. Senders seem to have malicious aims. The emails include a portion of some of our previous emails to the journal users and researchers. This is only to deceive the receiver and make them trust the email. Do not follow any links or perform suspicious actions specified in these emails. Please, check the sender info carefully. Even the sender address or name resembles the journal related words they are different, generally in an easily noticeable way.


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LATEST AWARDS


2022 Reviewer Awards:

Please, visit Reviewer Awards section for the winners of the 2022 RESM reviewer awards.


2022 Best Paper Award:

The paper authored by Nitin Kumar, Michele Barbato, Erika L. Rengifo-López and Fabio Matta entitled as “Capabilities and limitations of existing finite element simplified micro-modeling techniques for unreinforced masonry” is awarded the 


2022 Most Cited Paper Award:

The paper authored by Aykut Elmas, Güliz Akyüz, Ayhan Bergal, Müberra Andaç and Ömer Andaç entitled as “Mathematical modelling of drug release" is awarded the


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