Abstract

Concrete structures, such as armories, military bunkers, and petrochemical facilities, are susceptible to explosive loads during service. The superior mechanical properties of ultrahigh-performance concrete enable structures built with it to endure explosive loads. This study aims to characterize the behavior of ultrahigh-performance concrete at different ages, namely, 1, 3, 7, 14, and 28 days, at different strain rates. The compressive stress–strain response of ultrahigh-performance concrete is studied at static and high-strain-rate loading. The high-strain-rate response is characterized using a split-Hopkinson pressure bar of 100-mm diameter. The influence of age on strength, dynamic increase factor strain rate, elastic modulus, peak strain, and energy absorption are discussed. When tested at the same striker velocity, the dynamic increase factor and strain rate of ultrahigh-performance concrete of similar specimen size decrease with age. The elastic modulus and energy absorption increase from 1 to 14 days. There is no significant change in these quantities between 14 and 28 days. The strength, elastic modulus, and energy absorption increase with increasing strain rate for all ages. Experimental data are validated using the Tedesco model and current standards for stress, strain, and elastic modulus. The model from the standards overestimates strength, whereas the Tedesco model predicts strength conservatively.

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Data Availability Statement

Some or all data that support the findings of this study are available from the corresponding author upon reasonable request.

Acknowledgments

The authors gratefully acknowledge the help of Mr. Chandrashekhar Lakavath for developing mix design and staff of CASTCON Lab, Indian Institute of Technology Hyderabad-India. The authors thank the funding agency, the Ministry of Education, for supporting this research. The authors would also like to thank Ultra-Tech Cement Limited, Master Builder Solutions, and Elkem Silicones South Asia Pvt Ltd. for supplying materials for this research. Muthuraman Muthuraja: conceptualization, methodology, investigation, data curation, and writing–original draft. Swaminathan Ranjithkumar: conceptualization, methodology, investigation, and data curation. Syed Nizamuddin Khaderi: supervision and writing–review and editing. Shanmugam Suriya Prakash: supervision and writing–review and editing.

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Go to Journal of Materials in Civil Engineering
Journal of Materials in Civil Engineering
Volume 36Issue 11November 2024

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Received: Nov 14, 2023
Accepted: Mar 21, 2024
Published online: Aug 24, 2024
Published in print: Nov 1, 2024
Discussion open until: Jan 24, 2025

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Research Scholar, Dept. of Civil Engineering, Indian Institute of Technology Hyderabad, Hyderabad, Telangana 502284, India. ORCID: https://orcid.org/0000-0002-0132-6569. Email: [email protected]
Swaminathan Ranjithkumar [email protected]
Graduate Student, Dept. of Civil Engineering, Indian Institute of Technology Hyderabad, Hyderabad, Telangana 502284, India. Email: [email protected]
S. N. Khaderi [email protected]
Associate Professor, Dept. of Mechanical and Aerospace Engineering, Indian Institute of Technology Hyderabad, Hyderabad, Telangana 502284, India. Email: [email protected]
Shanmugam Suriya Prakash, Ph.D., A.M.ASCE https://orcid.org/0000-0003-0319-1773 [email protected]
Professor, Dept. of Civil Engineering, Indian Institute of Technology Hyderabad, Hyderabad, Telangana 502284, India (corresponding author). ORCID: https://orcid.org/0000-0003-0319-1773. Email: [email protected]

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