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Experiment study on tensile properties of steel fiber reinforced mortar exposed to elevated temperatures

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Abstract

In this study, a series of the dog-bone specimens were prepared to investigate the effects of the steel fiber types, fiber volume fractions and water/cement ratios on the tensile properties of steel fiber reinforced mortar (FRM) exposed to elevated temperatures by the uniaxial tensile test. The main properties of the FRM were examined, including the tensile strength, peak strain, elastic modulus and Poisson’s ratio. The results indicated that the tensile strength, elastic modulus and Poisson’s ratio of FRM gradually decreased with increasing exposed temperature, while the peak strain gradually increased. At room temperature, the tensile strength of mortar with the straight fiber (QP), hooked-end fiber (QW) and corrugated fiber (QB) were greater than that without steel fiber, and the effects of the hooked-end and corrugated fibers on the tensile behavior of FRM were more significant than that of the straight fiber, especially at the higher temperatures. Finally, the prediction formulas for the tensile strength and elastic modulus of FRM exposed to elevated temperatures were proposed by fitting the experimental data.

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Acknowledgements

This research work is financially supported by the National Natural Science Foundation of China (Grant No. U1704254, 52008377 and 51978629), Open Research Fund Program of State key Laboratory of Hydro science and Engineering (Sklhse-2017-D-01), Key Research Projects of Colleges and Universities in Henan Province (15A560038) and Henan province transportation science and technology plan project (2020J-2-7).

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  1. School of Civil Engineering, Zhengzhou University, Zhengzhou, 450001, China

    Danying Gao, Shaojie Dou, Yuyang Pang, Jiyu Tang & Yiming Kong

  2. Henan University of Engineering, Zhengzhou, Henan, 451191, China

    Danying Gao

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  1. Danying Gao
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  2. Shaojie Dou
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Correspondence to Yuyang Pang or Jiyu Tang.

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Gao, D., Dou, S., Pang, Y. et al. Experiment study on tensile properties of steel fiber reinforced mortar exposed to elevated temperatures. Mater Struct 54, 136 (2021). https://doi.org/10.1617/s11527-021-01705-x

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