Experimental Investigation of the Compressive Behavior of RCC under High Strain Rates: Considering the Rolling Technique and Layered Structure
Publication: Journal of Materials in Civil Engineering
Volume 30, Issue 4
Abstract
Roller-compacted concrete (RCC) is widely used in civil engineering, and its compressive behavior is commonly agreed to be affected by thin layers and the vibration rolling technique, which is different from conventional concrete, especially under high strain rates. However, experiments on RCC material under intermediate to high strain rates are relatively limited. In this paper, new empirical relations are proposed for dynamic compressive parameters of RCC specimens based on testing data via split Hopkinson pressure bar (SHPB). Additionally, the damage patterns under different strain rates are described, and strain-rate sensitivity, aggregate-grade effects, and size effects are tested and analyzed. The results indicate that heterogeneity and thin layers in the specimen composites play apparent roles in the dynamic compressive characteristics of RCC material. The stress-strain curve of RCC has a plateau at approximately of the critical strain, and the dynamic compressive strength, critical strain, and specific energy absorption (SEA) all increase with increasing strain rate, indicating fine ductility and effective energy absorption compared with conventional concrete.
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Acknowledgments
The authors gratefully appreciate the support from the National Natural Science Foundation of China (No. 51379141) and the National Natural Science Foundation of China (No. 51509182). Special thanks are given to Professor Zhang Lei of the Third Research Institute of the Corps of Engineering, General Staff of PLA for the assistance during the SHPB experiment.
Disclaimer
Sherong Zhang, Ran Song, Chao Wang, Xiaohua Wang, and Chao Shang have received research grants from the State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University).
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Published In
Journal of Materials in Civil Engineering
Volume 30 • Issue 4 • April 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Feb 18, 2017
Accepted: Oct 2, 2017
Published online: Feb 14, 2018
Published in print: Apr 1, 2018
Discussion open until: Jul 14, 2018
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