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[期刊论文]

A Study of Energy Dissipation of Polypropylene Fiber Reinforced Recycled Concrete Under Uniaxial Compression

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author:

Zhou, Daowen (Zhou, Daowen.) [1] | Yang, Xin (Yang, Xin.) [2] | Miao, Yutao (Miao, Yutao.) [3] | Unfold

Indexed by:

EI Scopus SCIE

Abstract:

The energy dissipation and stress-strain characteristics, and characteristic stresses, namely the crack initiation sigma ci , dilatancy sigma cd , and peak sigma f stresses, of polypropylene fiber-reinforced recycled concrete under uniaxial compression were studied. According to the research results, the crack initiation and peak stresses of the specimen with single-blend polypropylene coarse fiber (No. 3) and the specimens with mixed-blend coarse and fine polypropylene fibers (No. 4 and No. 5) are higher than those of the specimen with single-blend fine fiber and plain concrete. The analysis of the energy characteristics and failure mechanism of polypropylene fiber-reinforced recycled concrete during loading based on the principle of energy conservation showed that the total strain energy, elastic strain energy, and dissipation energy absorbed per unit volume increase with the blending of polypropylene fiber. The strain energy and elastic strain energy of coarse aggregates with a 5-10 to 10-20 mm coarse aggregate size ratios of 5:5 are higher than those of 4:6 and 6:4. It was found that the continuous blending of polypropylene fiber increases the elastic strain energy, causing the point at which the dissipation energy exceeds the elastic strain energy move further and further back. The position where the dissipation energy exceeds the elastic strain energy can be used to evaluate the blending effect of polypropylene fiber. The further back the position, the better the blending effect.

Keyword:

characteristic stress energy characteristics polypropylene fiber recycled concrete uniaxial compression

Community:

  • [ 1 ] [Zhou, Daowen]Fujian Univ Technol, Sch Civil Engn, Fuzhou 350118, Peoples R China
  • [ 2 ] [Yang, Xin]Fujian Univ Technol, Sch Civil Engn, Fuzhou 350118, Peoples R China
  • [ 3 ] [Yao, Zhixiong]Fujian Univ Technol, Sch Civil Engn, Fuzhou 350118, Peoples R China
  • [ 4 ] [Zhou, Daowen]Fujian Univ Technol, Fujian Prov Univ, Key Lab Underground Engn, Fuzhou 350118, Peoples R China
  • [ 5 ] [Yang, Xin]Fujian Univ Technol, Fujian Prov Univ, Key Lab Underground Engn, Fuzhou 350118, Peoples R China
  • [ 6 ] [Yao, Zhixiong]Fujian Univ Technol, Fujian Prov Univ, Key Lab Underground Engn, Fuzhou 350118, Peoples R China
  • [ 7 ] [Miao, Yutao]China Railway Second Grp Co Ltd, Chengtong Branch, Chengdu 610036, Peoples R China
  • [ 8 ] [Chen, Tingtao]China Railway Second Grp Co Ltd, Chengtong Branch, Chengdu 610036, Peoples R China
  • [ 9 ] [Zhou, Daowen]Fuzhou Univ, Sch Civil Engn, Fuzhou 350108, Peoples R China

Reprint 's Address:

  • [Yang, Xin]Fujian Univ Technol, Sch Civil Engn, Fuzhou 350118, Peoples R China;;[Yang, Xin]Fujian Univ Technol, Fujian Prov Univ, Key Lab Underground Engn, Fuzhou 350118, Peoples R China;;

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Source :

MECHANICS OF COMPOSITE MATERIALS

ISSN: 0191-5665

Year: 2024

Issue: 4

Volume: 60

Page: 717-728

1 . 5 0 0

JCR@2023

CAS Journal Grade:4

Cited Count:

WoS CC Cited Count:

30 Days PV: 2

Online/Total:174/10266932
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