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Author:

Deng, Zongcai (Deng, Zongcai.) (Scholars:邓宗才) | Daud, Jumbe R. (Daud, Jumbe R..) | Gao, Lei (Gao, Lei.)

Indexed by:

EI Scopus SCIE

Abstract:

Flexural toughness tests are performed to investigate the influence of hybrid fibers on the toughness of reactive powder concrete (RPC). The experiment uses different amounts of high-strength steel fibers and macro-polyolefin or micro-polyvinyl alcohol (PVA) fiber. Two kinds RPC, silica fume and ultra-fine cement RPCs, are prepared to compare their toughness performance. Steel fiber volume fraction is 1 and 2 % while synthetic fiber contents are 6, 9 and 11 kg/m(3). The effects of hybrid fiber on the toughness performance of the two kinds of RPC were discussed. Strain hardening characteristics of load-deflection curves of hybrid fiber RPC were achieved. The test results show that the toughness index of hybrid specimens of 1 % steel fiber and 1 % macro-polyolefin fibers is larger than that of specimens with only 2 % steel fibers, especially for ultra-fine cement specimens. Comparing specimens with only 1 % steel fibers and those with hybrid fiber, the toughness index T(7) of silica fume specimens increased by 47.3-98.8 %, whereas T(7) of ultra-fine cement RPC specimens increased by 82.3-215.6 %, respectively. For higher volume of steel fiber it is advised to use less amount of micro-PVA fiber.

Keyword:

Silica fume Hybrid fibers Reactive powder concrete Flexural toughness Secondary hardening

Author Community:

  • [ 1 ] [Deng, Zongcai]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China
  • [ 2 ] [Daud, Jumbe R.]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China
  • [ 3 ] [Gao, Lei]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China

Reprint Author's Address:

  • 邓宗才

    [Deng, Zongcai]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China

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Source :

JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING

ISSN: 1678-5878

Year: 2017

Issue: 1

Volume: 39

Page: 279-288

2 . 2 0 0

JCR@2022

ESI Discipline: ENGINEERING;

ESI HC Threshold:165

CAS Journal Grade:4

Cited Count:

WoS CC Cited Count: 9

SCOPUS Cited Count: 9

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 7

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