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Research Article

Empirical equations for prediction of split tensile and flexural strength of high strength concrete including effect of steel fiber

P.N. Ojha, Brijesh Singh, Pranay Singh

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

Keywords

Abstract



High Strength Concrete;

Flexural Strength;

Split Tensile Strength;

International Code;

Empirical Equation


The current Indian Standard IS: 456-2000 has the equation for prediction of flexural strength which is valid only up to concrete strength of 55 MPa and with introduction of High Strength Concrete (HSC) in the standard, there is need to develop equation and relationship which can predict flexural and split tensile strength of HSC including the effect of steel fibres. This study is aimed to develop relationship between the ratios of split tensile to flexural strength which is applicable to concrete having strength range from 15 MPa to 150 MPa. The study is done by analyzing experimentally obtained test results of a total 120 specimens for flexural strength and 120 specimens for split tensile strength. Further study is also conducted on steel fibre reinforced concrete samples by analyzing experimentally obtained test results of a total 24 specimens for flexural strength and 30 specimens for split tensile strength. The results obtained from the test are compared with empirical equations given by International standards and literatures. On the basis of analysis of results, ratio of split tensile strength to flexural strength is recommended for concrete with and without steel fibre having wide strength range from 100 to 120 MPa. Empirical equations for prediction of spilt tensile and flexure strength of normal to high strength concrete is proposed and applicability of proposed equation for evaluation for normal to high strength steel fiber reinforced concrete is also discussed.

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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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