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Residual properties of ultra-high performance concrete containing steel-polypropylene hybrid fiber exposed to elevated temperature at early age

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Residual properties of ultra-high performance concrete containing steel-polypropylene hybrid fiber exposed to elevated temperature at early age. / Wang, T.; Yu, M.; Tian, J. et al.
In: Journal of Building Engineering, Vol. 99, 111507, 01.04.2025.

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Wang T, Yu M, Tian J, Sun Z, Yu C, Ye J. Residual properties of ultra-high performance concrete containing steel-polypropylene hybrid fiber exposed to elevated temperature at early age. Journal of Building Engineering. 2025 Apr 1;99:111507. Epub 2024 Dec 10. doi: 10.1016/j.jobe.2024.111507

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Bibtex

@article{766908c7d72742499e3961cafacdae57,
title = "Residual properties of ultra-high performance concrete containing steel-polypropylene hybrid fiber exposed to elevated temperature at early age",
abstract = "To investigate residual properties of Ultra-High Performance Concrete (UHPC) containing steel-polypropylene hybrid fiber subjected to fire accidents during construction, uniaxial compressive tests were carried out on UHPC exposed to elevated temperature at early age. The test parameters include the age exposed to elevated temperature, temperature levels, steel fiber content and coarse aggregate content. Based on the test results, failure mode, strength, elastic modulus, peak strain, and strain-stress response of the tested specimens were analyzed. Additionally, microstructures of the specimens were characterized using X-ray diffraction and scanning electron microscopy. The test results show that up to 600 °C, the residual compressive strength of the UHPC generally increases with age due to the improved resistance and accelerated hydration. At 800 °C, the strength decreases slightly with age due to the porosity and carbonation reactions. Finally, an empirical formula was proposed to predict the compressive strength, peak strain, elastic modulus, and the uniaxial compressive stress-strain constitutive model of the UHPC exposed to elevated temperature at early age. ",
keywords = "Early age, Elevated temperatures, Residual performance, Steel-polypropylene hybrid fiber, Ultra-high performance concrete, Compression testing, Polypropylenes, Stress-strain curves, Elevated temperature, Exposed to, High-performance concrete, Hybrid fiber, Peak strains, Residual properties, Ultra high performance, Steel fibers",
author = "T. Wang and M. Yu and J. Tian and Z. Sun and C. Yu and J. Ye",
note = "Export Date: 18 December 2024 Correspondence Address: Yu, M.; School of Civil Engineering, China; email: ceyumin@whu.edu.cn Funding details: National Natural Science Foundation of China, NSFC, 52178157 Funding details: National Natural Science Foundation of China, NSFC Funding text 1: This study was supported financially by the National Natural Science Foundation of China (Grant NO.52178157).",
year = "2025",
month = apr,
day = "1",
doi = "10.1016/j.jobe.2024.111507",
language = "English",
volume = "99",
journal = "Journal of Building Engineering",
issn = "2352-7102",
publisher = "Elsevier Ltd",

}

RIS

TY - JOUR

T1 - Residual properties of ultra-high performance concrete containing steel-polypropylene hybrid fiber exposed to elevated temperature at early age

AU - Wang, T.

AU - Yu, M.

AU - Tian, J.

AU - Sun, Z.

AU - Yu, C.

AU - Ye, J.

N1 - Export Date: 18 December 2024 Correspondence Address: Yu, M.; School of Civil Engineering, China; email: ceyumin@whu.edu.cn Funding details: National Natural Science Foundation of China, NSFC, 52178157 Funding details: National Natural Science Foundation of China, NSFC Funding text 1: This study was supported financially by the National Natural Science Foundation of China (Grant NO.52178157).

PY - 2025/4/1

Y1 - 2025/4/1

N2 - To investigate residual properties of Ultra-High Performance Concrete (UHPC) containing steel-polypropylene hybrid fiber subjected to fire accidents during construction, uniaxial compressive tests were carried out on UHPC exposed to elevated temperature at early age. The test parameters include the age exposed to elevated temperature, temperature levels, steel fiber content and coarse aggregate content. Based on the test results, failure mode, strength, elastic modulus, peak strain, and strain-stress response of the tested specimens were analyzed. Additionally, microstructures of the specimens were characterized using X-ray diffraction and scanning electron microscopy. The test results show that up to 600 °C, the residual compressive strength of the UHPC generally increases with age due to the improved resistance and accelerated hydration. At 800 °C, the strength decreases slightly with age due to the porosity and carbonation reactions. Finally, an empirical formula was proposed to predict the compressive strength, peak strain, elastic modulus, and the uniaxial compressive stress-strain constitutive model of the UHPC exposed to elevated temperature at early age.

AB - To investigate residual properties of Ultra-High Performance Concrete (UHPC) containing steel-polypropylene hybrid fiber subjected to fire accidents during construction, uniaxial compressive tests were carried out on UHPC exposed to elevated temperature at early age. The test parameters include the age exposed to elevated temperature, temperature levels, steel fiber content and coarse aggregate content. Based on the test results, failure mode, strength, elastic modulus, peak strain, and strain-stress response of the tested specimens were analyzed. Additionally, microstructures of the specimens were characterized using X-ray diffraction and scanning electron microscopy. The test results show that up to 600 °C, the residual compressive strength of the UHPC generally increases with age due to the improved resistance and accelerated hydration. At 800 °C, the strength decreases slightly with age due to the porosity and carbonation reactions. Finally, an empirical formula was proposed to predict the compressive strength, peak strain, elastic modulus, and the uniaxial compressive stress-strain constitutive model of the UHPC exposed to elevated temperature at early age.

KW - Early age

KW - Elevated temperatures

KW - Residual performance

KW - Steel-polypropylene hybrid fiber

KW - Ultra-high performance concrete

KW - Compression testing

KW - Polypropylenes

KW - Stress-strain curves

KW - Elevated temperature

KW - Exposed to

KW - High-performance concrete

KW - Hybrid fiber

KW - Peak strains

KW - Residual properties

KW - Ultra high performance

KW - Steel fibers

U2 - 10.1016/j.jobe.2024.111507

DO - 10.1016/j.jobe.2024.111507

M3 - Journal article

VL - 99

JO - Journal of Building Engineering

JF - Journal of Building Engineering

SN - 2352-7102

M1 - 111507

ER -