EFFECTS OF AGES ON FRACTURE PROPERTIES OF ORIENTED STEEL FIBER-REINFORCED CEMENTITIOUS COMPOSITES

QING Longbang; YANG Zhuofan; MU Ru

doi:10.13204/j.gyjzG20012801

Volume 51 Issue 1

Apr. 2021

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QING Longbang, YANG Zhuofan, MU Ru. EFFECTS OF AGES ON FRACTURE PROPERTIES OF ORIENTED STEEL FIBER-REINFORCED CEMENTITIOUS COMPOSITES[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(1): 146-151. doi: 10.13204/j.gyjzG20012801

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EFFECTS OF AGES ON FRACTURE PROPERTIES OF ORIENTED STEEL FIBER-REINFORCED CEMENTITIOUS COMPOSITES

doi: 10.13204/j.gyjzG20012801

Department of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China

Received Date: 2020-05-27
Available Online: 2021-04-30

Abstract

Abstract

The three-point bending tests on notched beams of different ages were conducted. The effects of ages on the fracture properties of oriented steel fiber-reinforced cementitious composites and randomly oriented steel fiber-reinforced cementitious composites were studied. Based on the curves of loadimg and crack opening displacement, the whole process of crack development of steel fiber-reinforced cementitious composites at different curing ages was analyzed. The results showed that, the flexural strength of steel fiber-reinforced cementitious composites increased with the increase of curing ages. The fracture energy of the composites increased rapidly in the stage of the first 7 days, and then slowed down and tended to be stable. When the volume contents of steel fiber varied from 1.2% to 2.0%, the fracture energy increased significantly, and the inprovement effect of the fracture energy of the composites was more obvious than that of randomly oriented fiber-reinforced cementitions conposites.
- age,
- oriented steel fiber,
- cementitious composite,
- flexural strength,
- fracture energy

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References

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