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作者:

Ding, Yao (Ding, Yao.) | Bai, Yu-Lei (Bai, Yu-Lei.) (学者:白玉磊)

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摘要:

Adding short steel fibers into slag-based geopolymer mortar and concrete is an effective method to enhance their mechanical properties. The fracture properties of steel fiber-reinforced slag-based geopolymer concrete/mortar (SGC/SGM) and unreinforced control samples were compared through three-point bending (TPB) tests. The influences of steel fiber volume contents (1.0%, 1.5% and 2.0%) on the fracture properties of SGC and SGM were studied. Load-midspan deflection (P-d) curves and load-crack mouth opening displacement (P-CMOD) curves of the tested beams were recorded. The compressive and splitting tensile strengths were also tested. The fracture energy, flexural strength parameters, and fracture toughness of steel fiber-reinforced SGC and SGM were calculated and analyzed. The softening curves of steel fiber-reinforced SGC and SGM were determined using inverse analysis. The experimental results show that the splitting tensile strength, fracture energy, and fracture toughness are significantly enhanced with fiber incorporation. A strong correlation between the equivalent and residual flexural strengths is also observed. In addition, the trilinear strain-softening curves obtained by inverse analysis predict well of the load-displacement curves recorded from TPB tests.

关键词:

softening curve concrete fracture property mortar slag-based geopolymer short steel fibers

作者机构:

  • [ 1 ] [Ding, Yao]Chongqing Univ, Coll Civil Engn, Chongqing 400044, Peoples R China
  • [ 2 ] [Bai, Yu-Lei]Beijing Univ Technol, Minist Educ, Key Lab Urban Secur & Disaster Engn, Beijing 100124, Peoples R China

通讯作者信息:

  • 白玉磊

    [Bai, Yu-Lei]Beijing Univ Technol, Minist Educ, Key Lab Urban Secur & Disaster Engn, Beijing 100124, Peoples R China

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来源 :

MATERIALS

年份: 2018

期: 8

卷: 11

3 . 4 0 0

JCR@2022

ESI学科: MATERIALS SCIENCE;

ESI高被引阀值:260

被引次数:

WoS核心集被引频次: 55

SCOPUS被引频次: 47

ESI高被引论文在榜: 0 展开所有

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