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Article

Experimental Study on the Fracture Parameters of Concrete

by 1, 1,* and 2,3
1
School of Water Conservancy Engineering, Zhengzhou University, Zhengzhou 450001, China
2
School of Civil Engineering, Zhengzhou University, Zhengzhou 450002, China
3
College of Civil Engineering, Henan University of Engineering, Zhengzhou 451191, China
*
Author to whom correspondence should be addressed.
Materials 2021, 14(1), 129; https://doi.org/10.3390/ma14010129
Received: 27 November 2020 / Revised: 22 December 2020 / Accepted: 28 December 2020 / Published: 30 December 2020
(This article belongs to the Special Issue Research of Mechanical Behavior of Cement and Concrete Composites)
This study aimed to determine the influence of the volume fraction of steel fibers on the fracture parameters of concrete. Fifty notched steel-fiber-reinforced concrete (SFRC) beams and ordinary concrete beams with 100 mm × 100 mm × 515 mm were cast and tested via a three-point bending test. Among them, the type of steel fiber was the milling type (MF), and the volume fraction of steel fiber added was 0%, 0.5%, 1%, 1.5% and 2%, respectively. The effects of the steel fiber volume fraction (VF) on the critical stress intensity factor (KIC), fracture energy (GF), the deflection at failure(δ0), the critical crack mouth opening displacement (CMODC) and the critical crack tip opening displacement (CTODC) were studied. Through the analysis of test phenomena and test data such as the load-deflection (P-δ) curve, load-crack mouth opening displacement (P-CMOD) curve and load-crack tip opening displacement (P-CTOD) curve, the following conclusions are drawn: with the increase of the steel fiber volume fraction, some fracture parameters increase gradually and maintain a certain linear growth. The gain ratio of the fracture parameters increases significantly, and the gain effect is obvious. Through this law of growth, the experimental statistical formulas of fracture energy and the critical stress intensity factor are summarized. View Full-Text
Keywords: steel fiber; three-point bending; fracture parameters; gain ratio steel fiber; three-point bending; fracture parameters; gain ratio
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MDPI and ACS Style

Wang, Z.; Gou, J.; Gao, D. Experimental Study on the Fracture Parameters of Concrete. Materials 2021, 14, 129. https://doi.org/10.3390/ma14010129

AMA Style

Wang Z, Gou J, Gao D. Experimental Study on the Fracture Parameters of Concrete. Materials. 2021; 14(1):129. https://doi.org/10.3390/ma14010129

Chicago/Turabian Style

Wang, Zhanqiao, Jin Gou, and Danying Gao. 2021. "Experimental Study on the Fracture Parameters of Concrete" Materials 14, no. 1: 129. https://doi.org/10.3390/ma14010129

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