Axial strength of CFRP strengthened concrete columns under elevated humid environments

Mohd Zuwairi Samsuddin, Raizal Rashid, Riyad Aboutaha

Research output: Contribution to conferencePaperpeer-review

1 Scopus citations


Carbon fiber reinforced polymer (CFRP) has been proven to be effective in increasing the axial strength of concrete columns. However, there is very limited data on the effects of high humidity on the performance of CFRP strengthened columns. In addition, humidity has direct impact on the strength of concrete material. This paper presents the results of an experimental investigation of short concrete columns strengthened with transverse CFRP wrapping, under various humid conditions. A large series of concrete cylinder to stimulate as concrete column were strengthened and tested at 60%, 70%, 80%, and 90% relative humidity. Specimens were stored for at least three weeks at every specified constant humidity level, then tested under pure axial loads. The axial load and longitudinal deformations of each specimen were measured during the test. Test results suggest that an increase in humidity will lead to a reduction in the axial strength of CFRP strengthened concrete columns. An equation to predict compressive strength of CFRP - confined concrete column exposed to high humidity was established. Details of strengthening system, as well as the experimental program, and test results will be presented.


ConferenceJoint Conference of the 12th International Symposium on Fiber Reinforced Polymers for Reinforced Concrete Structures, FRPRCS 2015 and the 5th Asia-Pacific Conference on Fiber Reinforced Polymers in Structures, APFIS 2015


  • Carbon fiber reinforced polymer
  • Column strengthening
  • Compressive strength
  • Humidity effects
  • Ultimate strength prediction

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • General Materials Science


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