High TG FRP & cementitious adhesive: Potential benefits in fire for NSM FRP strengthened reinforced concrete beams

Iolanda Del Prete, Antonio Bilotta, Luke Bisby, Emidio Nigro

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

Abstract / Description of output

Near surface mounted FRP strengthening is potentially less prone to damage due tofire exposure than externally bonded FRP reinforcement (EBR), provided that: (a) an FRP strengthening material with high glass transition and decomposition temperatures (Tg and Td, respectively); and (b) a bonding agent with low thermal conductivity and good thermal stability, are used. This paper presents a project undertaken on a specific high Tg and cementitious adhesive bonded NSM FRP strengthening system. Dynamic Mechanic Analysis (DMA) and Thermogravimetric Analysis (TGA) performed on the novel high Tg commercial CFRP bar yielded a Tg value of 220°C (based on tanδ peak) and Td of about 360°C. Thermal conductivity tests were also performed on the cementitious grout. The results were used to better explain the failure modes of NSM FRP strengthened reinforced concrete beams at elevated temperature. The paper highlights the importance of understandingthe thermo-mechanical properties of the various constituent materials for improving the performance of FRP strengthening systems in fire.

Original languageEnglish
Title of host publicationApplications of Structural Engineering
EditorsFrantisek Wald, D. Bjegovic, K. Horova, Ian Burgess, M. Jelcic Rukavina
PublisherCTU Publishing House, Czech Technical University in Prague
ISBN (Electronic)9788001061947
DOIs
Publication statusPublished - 1 Jan 2017
Event2015 International Conference on Applications of Structural Fire Engineering, ASFE 2015 - Dubrovnik, Croatia
Duration: 15 Oct 201516 Oct 2015

Publication series

NameProceedings of the International Conference on Applications of Structural Fire Engineering
PublisherCzech Technical University
ISSN (Print)2336-7318
ISSN (Electronic)2570-8074

Conference

Conference2015 International Conference on Applications of Structural Fire Engineering, ASFE 2015
Country/TerritoryCroatia
CityDubrovnik
Period15/10/1516/10/15

Keywords / Materials (for Non-textual outputs)

  • DMA
  • Fire testing
  • NSM-FRP
  • TGA

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