Effect of ultra-low temperature on flexural behavior of ultra-high toughness cementitious composites

SU Jun; QIAN Weimin

doi:10.13801/j.cnki.fhclxb.20210823.001

Volume 39 Issue 6

Jun. 2022

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SU Jun, QIAN Weimin. Effect of ultra-low temperature on flexural behavior of ultra-high toughness cementitious composites[J]. Acta Materiae Compositae Sinica, 2022, 39(6): 2844-2854. doi: 10.13801/j.cnki.fhclxb.20210823.001

Citation:

SU Jun, QIAN Weimin. Effect of ultra-low temperature on flexural behavior of ultra-high toughness cementitious composites[J]. Acta Materiae Compositae Sinica, 2022, 39(6): 2844-2854. doi: 10.13801/j.cnki.fhclxb.20210823.001

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Effect of ultra-low temperature on flexural behavior of ultra-high toughness cementitious composites

doi: 10.13801/j.cnki.fhclxb.20210823.001

SU Jun^{1, 2
,},
QIAN Weimin^{1
,
,}

1.
School of Civil Engineering and Environment, Hubei University of Technology, Wuhan 430068, China
2.
Hubei University of Technology Engineering and Technology College, Hubei University of Technology, Wuhan 430068, China

Received Date: 2021-06-25
Accepted Date: 2021-08-12
Rev Recd Date: 2021-08-04

Available Online: 2021-08-26

Publish Date: 2022-06-01

Abstract

Abstract

As a new type of composite material with good mechanical properties and durability, the flexural toughness of ultra-high toughness cementitious composites (UHTCC) is an important indicator to evaluate its mechanical properties. To explore the bending performance of UHTCC materials under an ultra-low temperature environment, five groups of UHTCC materials with different fiber contents were designed. After cryogenic treatment, four-point bending tests were carried out, and the equivalent strength was analyzed. A toughness evaluation method suitable for ultra-low temperature was proposed, which provided the theoretical basis and technical support for the wide application of UHTCC in the field of ultra-low temperature. The results show that the flexural strength of UHTCC increases significantly after ultra-low temperatures. When the temperature decreases to −160℃, the flexural strength of UHTCC increases by 67.67%, but it shows obvious brittleness. In an ultra-low temperature environment, the strength and toughness of UHTCC with 1.5vol% volume fraction are the best, but the performance of UHTCC is slightly reduced after exceeding the optimal volume fraction.
- ultra-high toughness cementitious composites,
- ultra-low temperature,
- bending strength,
- toughness,
- fiber content
Long Abstrsct
Innovation Points

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References(22)

References

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