Experimental tests on discrete BFRP needles reinforced seawater sea-sand concrete-filled GFRP tubular stub columns

Z. Q. Dong, G. Wu, Xiao Lin Zhao, H. Zhu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

This paper proposes a new type of tubular column, which is composed of the glass fibre-reinforced polymer (GFRP) tube and discrete basalt fibre-reinforced polymer (BFRP) needles reinforced seawater sea-sand concrete (SWSSC). The discrete BFRP needles, with an aspect ratio of 10.0, were cut from BFRP bar production scrap and mixed into fresh concrete to replace 20% of the coarse aggregates by volume. The axial compression properties of the tubular columns were tested. The test variables included the wall thickness of the GFRP tubes, the type of coarse aggregates, and the incorporation of BFRP needles or not. The test results showed that the inclusion of BFRP needles had litter adverse effects on the compressive strength: the peak axial stress reduced slightly by 2.5% for gravel concrete and 7.2% for coral concrete, and the corresponding peak axial strain increased by 17.8% and 17.0%, respectively. The compression performance of columns with GFRP tubes was improved significantly. Overall, the proposed BFRP needles reinforced SWSSC has promising application prospects in practical engineering, and its performance was further improved with GFRP tube confinement.

Original languageEnglish
Title of host publicationAPFIS 2019 Proceedings - 7th Asia-Pacific Conference on FRP in Structures
EditorsScott T. Smith, Tao Yu, Dilum Fernando, Zhenyu Wang
PublisherAPFIS Conference Series
ISBN (Electronic)9780648752899
Publication statusPublished - 1 Dec 2019
Externally publishedYes
Event7th Asia-Pacific Conference on FRP in Structures, APFIS 2019 - Brisbane, Australia
Duration: 10 Dec 201913 Dec 2019

Publication series

NameAPFIS 2019 Proceedings - 7th Asia-Pacific Conference on FRP in Structures

Conference

Conference7th Asia-Pacific Conference on FRP in Structures, APFIS 2019
Country/TerritoryAustralia
CityBrisbane
Period10/12/1913/12/19

Keywords

  • BFRP needles
  • Compression
  • Coral aggregates
  • GFRP tubular columns
  • Seawater sea-sand concrete

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Materials Science(all)

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