Prediction of Compressive Strength of Concrete Using Double-Shear Testing Method
Publication: Journal of Materials in Civil Engineering
Volume 33, Issue 1
Abstract
This study presents a partially nondestructive testing (PDT) method, the innovative double-shear test method (DSTM), to improve the accuracy of concrete strength tests in situ and reduce structural damage. This method involves double-shear faces of the concrete core, on which the load is exerted by a specified DSTM apparatus to produce approximately pure shear stress and obtain the shear strength of the concrete core. The DSTM test indicated that some factors (core-drilling direction, specimen diameter, core length, aggregate type, and concrete moisture) do not influence concrete strength, and a strong relationship between DSTM strength and cube compressive strength ranging from 20 to 40 MPa is proposed for testing concrete samples. The reliability and repeatability of the DSTM are greater than those of other in situ test techniques, such as the Schmidt rebound hammer (SRH) and pull-off test method. Features of the visible failure mode of concrete samples certify the correctness of the test results. Test results demonstrated that the DSTM is applicable to in situ tests of concrete compressive strength with much higher accuracy than the core-drilling method, and causes less damage to structures.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request, such as the experimental data of the DSTM tests and in situ verification of the DSTM.
Acknowledgments
This study is supported by the Opening Foundation of the Shandong Key Laboratory of Civil Engineering Disaster Prevention and Mitigation (Grant No. CDPM2019KF10); the National Natural Science Foundation of China (Grant No. 51908341); the Opening Foundation of the Key Laboratory of Concrete and Prestressed Concrete Structure, Ministry of Education, Southeast University (Grant No. CPCSME2019-06); and the Research Project of Changzhou Institute of Technology (Grant Nos. E3-6701-18-064 and YN18044).
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Published In
Journal of Materials in Civil Engineering
Volume 33 • Issue 1 • January 2021
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Feb 7, 2020
Accepted: Jun 19, 2020
Published online: Oct 26, 2020
Published in print: Jan 1, 2021
Discussion open until: Mar 26, 2021
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