Effect of bonded length on material characterization ofFRCMComposites

Houman Hadad, Davide Campanini, Antonio Nanni

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Fabric Reinforced Cementitious Matrix (FRCM) is an established technology for strengthening and rehabilitation of existing concrete and masonry structures. In the United States, material characterization of the FRCM composites is in accordance with ICC-ES acceptance criteria AC434. The acceptance criteria recommend tensile testing the FRCM coupons with clevis-grips to obtain the mechanical properties for design purposes. The current test method, however, neglects some of the critical factors affecting the test outcome such as the effect of bonded length or number of fabric layers. The effect of bonded length on the FRCM properties tested per AC434 Annex-A is discussed in this paper. Carbon-FRCM coupons of 2, 3, 6, 9, and 12 inches (50.8, 76.2, 152.4, 228.6, and 304.8 mm) bonded length were prepared and tested in direct tension. The other test variable was the number of fabric layers. The tests were conducted with one- and two-layer fabrics for different bonded length. The results discussed in terms of ultimate stress, ultimate strain, and modulus show that the material characterization of the FRCM composites depended on the bonded length and number of fabric layers of the tested specimens. Moreover, the effect of number of fabric layers on the material characteristics was more pronounced in specimens with shorter bonded length. The experimental results are used to make suggestions for improving the FRCM characterization test methods as currently stated in AC434.

Original languageEnglish (US)
Title of host publicationMaterials, Analysis, Structural Design and Applications of Textile Reinforced Concrete/Fabric Reinforced Cementitious Matrix
EditorsBarzin Mobasher, Flavio de Andrade Silva
PublisherAmerican Concrete Institute
Pages86-101
Number of pages16
ISBN (Electronic)9781641951333
StatePublished - Feb 19 2021
EventMaterials, Analysis, Structural Design and Applications of Textile Reinforced Concrete/Fabric Reinforced Cementitious Matrix at the Concrete Convention and Exposition - Fall 2019 - Cincinnati, United States
Duration: Oct 20 2019Oct 24 2019

Publication series

NameAmerican Concrete Institute, ACI Special Publication
VolumeSP-345
ISSN (Print)0193-2527

Conference

ConferenceMaterials, Analysis, Structural Design and Applications of Textile Reinforced Concrete/Fabric Reinforced Cementitious Matrix at the Concrete Convention and Exposition - Fall 2019
Country/TerritoryUnited States
CityCincinnati
Period10/20/1910/24/19

Keywords

  • Bond
  • Composite Materials
  • Fabric Reinforced Cementitious Matrix (FRCM)
  • Material Characterization
  • Strengthening
  • Tensile testing

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

Fingerprint

Dive into the research topics of 'Effect of bonded length on material characterization ofFRCMComposites'. Together they form a unique fingerprint.

Cite this