Shear crack propagation in MBC strengthened concrete beams”.

Björn Täljsten, Thomas Blanksvärd, Anders Carolin

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

Repair and upgrading existing concrete structures using FRPs and an epoxy adhesive as the bonding agent has some disadvantages when it comes to compatibility to the base concrete. Epoxies are often restricted by regulations of use, have low permeability which may create freeze/thaw problems, poor thermal compatibility to the base concrete and are often sensitive to the surface nature and surrounding temperature. By using mineral based composites (MBC) some of these challenges can be overcome. MBC refers here to a cementitious bonding agent and a carbon FRP grid. This paper is a part of an ongoing study of MBC systems. Emphasis is placed on the cracking behavior of the MBC system used for shear strengthening of RC beams. Traditional foil strain gauges and photometric measurements have been used for monitoring of the cracking behavior. In this study it is shown that the use of mineral based shear strengthening postpones the formation of macro-cracks and that a considerably strengthening effect could be achieved.
Original languageEnglish
Title of host publicationFRP Composites in Civil Engineering
Number of pages272
PublisherEMPA
Publication date2008
ISBN (Print)978-3-905594-50-8
Publication statusPublished - 2008
Event4th International Conference on FRP Composites in Civil Engineering - Zurich, Switzerland
Duration: 22 Jul 200824 Jul 2008
Conference number: 4
http://www.empa.ch/plugin/template/empa/24/57147/---/l=1/changeLang=true/lartid=57147/orga=/type=/theme=/bestellbar=/new_abt=/uacc=

Conference

Conference4th International Conference on FRP Composites in Civil Engineering
Number4
CountrySwitzerland
CityZurich
Period22/07/200824/07/2008
Internet address

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