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Shin, Myoungsu
Sustainable Structural Systems Lab
Research Interests
  • Seismic design, Tall buildings, High performance composites, Non-destructive evaluation

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Strength and toughness of hybrid steel and glass fiber-reinforced sulfur polymer composites

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Title
Strength and toughness of hybrid steel and glass fiber-reinforced sulfur polymer composites
Author
Gwon, SeongwooKim, SeungpilAhn, EunjongKim, ChanyoungShin, Myoungsu
Issue Date
2019-12
Publisher
Elsevier BV
Citation
CONSTRUCTION AND BUILDING MATERIALS, v.228, pp.116812
Abstract
In this study, we investigated the effects of microfibers on the compressive and flexural behaviors of modified sulfur composites. Dicyclopentadiene-modified sulfur was used as the binder in the sulfur composites. Fifteen mix cases were tested by varying the volumetric ratios of steel and electric chemical resistant glass fibers. Fly ash (35% by volume) was included to not only increase strength and workability, but also ensure fiber dispersibility in the matrix. A non-contact displacement measurement technique, digital image correlation, was used in flexure tests to monitor the development of high strain zones and microcracks. The effect of fiber dosage on the porosity of sulfur composites was analyzed by quantifying the pore volume and size distribution through mercury intrusion porosimetry. The test results confirmed that the hybrid use of steel and glass fibers with a volume ratio of up to 4% was effective in improving the flexural stress-deflection response. The post-peak toughness ratio in flexure increased as the volume of microfibers increased. In addition, the total volume of hybrid microfibers generally had a positive correlation with the flexural strength. In contrast, the compressive strength of hybrid fiber-reinforced sulfur composites was more dependent on the portion of steel fibers than glass fibers.
URI
https://scholarworks.unist.ac.kr/handle/201301/27329
URL
https://www.sciencedirect.com/science/article/pii/S0950061819322421?via%3Dihub
DOI
10.1016/j.conbuildmat.2019.116812
ISSN
0950-0618
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