Hybrid reinforcement of steel-polyethylene fibers in cementless ultra-high performance alkali-activated concrete with various silica sand dosages

被引：16

作者：

Kim, Gi Woong ^{[1
]}

Oh, Taekgeun ^{[1
]}

Lee, Seung Kyun ^{[1
]}

Lee, Seung Won ^{[1
]}

Banthia, Nemkumar ^{[2
]}

Yu, Eunjong ^{[1
]}

Yoo, Doo-Yeol ^{[3
]}

机构：

[1] Hanyang Univ, Dept Architectural Engn, 222 Wangsimni Ro, Seoul 04763, South Korea

[2] Univ British Columbia, Dept Civil Engn, 6250 Appl Sci Lane, Vancouver, BC V6T 1Z4, Canada

[3] Yonsei Univ, Dept Architecture & Architectural Engn, 50 Yonsei Ro, Seoul 03722, South Korea

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2023年 / 394卷

基金：

新加坡国家研究基金会;

关键词：

Ultra-high performance alkali-activated con-; crete; Hybrid fiber reinforcement; Fine aggregate-to-binder ratio; Mechanical properties; Pseudo strain-hardening index; STRAIN-HARDENING BEHAVIOR; MECHANICAL PERFORMANCE; TENSILE BEHAVIOR; CO2; EMISSION; SLAG; MICROSTRUCTURE; RESISTANCE; STRENGTH; GEOMETRY; AMBIENT;

D O I：

10.1016/j.conbuildmat.2023.132213

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The effects of steel and polyethylene (PE) fiber hybrid reinforcement on the mechanical performance of cementless ultra-high performance alkali-activated concrete (UHP-AAC) containing an industrial by-product and various amounts of silica sand were investigated. Replacing steel fibers with PE fibers reduced the compressive and tensile strengths, with the best performance was observed in the hybrid specimens with a medium-grade fine aggregate-to-binder (FA/B) ratio. Increasing the PE fiber replacement ratio and decreasing the FA/B ratio increased the occurrence of multiple microcracks. The FA/B ratio had a greater effect on the variation in the pseudo-strain hardening indices than the fiber replacement ratio. The highest complementary energy, 1,762.5 J/ m2, was obtained for PE fiber-reinforced UHP-AAC at an FA/B ratio of 0.16, while the lowest value, 309.6 J/m2, was obtained for steel-fiber-reinforced UHP-AAC at the same FA/B ratio. In conclusion, the hybrid reinforcement of UHP-AAC can be optimized by considering the FA/B ratio and fiber replacement ratio.

引用

页数：15

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