Development of a new test method for Mineral Based Composites: Wedge splitting test

Björn Täljsten, Katalin Orosz

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

Abstract

The well-known wedge splitting test, often used for characterizing brittle materials has been modified and adapted to testing MBC-reinforced concrete under splitting load. MBC (Mineral Based Composites) is a newly developed strengthening system for existing concrete structures where FRPs, mainly CFRP grids are externally bonded to the concrete surface by means of cementitious bonding agents. Crack development, crack patterns, crack opening displacement (COD) versus splitting load and fracture energy are investigated and evaluated. Development of a suitable test specimen and test setup has been accomplished. Bond provided by both mortars was excellent leading to CFRP rupture. By applying PVA-reinforced ductile ECC as bonding agent, improved performance, significantly higher fracture energy, multiple cracking and enhanced ductility were observed, caused by improved bond between grid and mortar due to the refined grain structure, the bridging effect of the embedded fibres working against crack opening and via direct mechanical interlock with the grid
Original languageEnglish
Title of host publication2nd International Conference on Concrete Repair, Rehabilitation and Retrofitting (ICCRRR2008)
Place of PublicationSouth Africa
PublisherCRC Press
Publication date2008
ISBN (Print)978-0-415-46850-3
Publication statusPublished - 2008
EventDevelopment of a new test method for Mineral Based Composites : Wedge splitting test - South Africa
Duration: 1 Jan 2008 → …

Conference

ConferenceDevelopment of a new test method for Mineral Based Composites : Wedge splitting test
CitySouth Africa
Period01/01/2008 → …

Cite this

Täljsten, B., & Orosz, K. (2008). Development of a new test method for Mineral Based Composites: Wedge splitting test. In 2nd International Conference on Concrete Repair, Rehabilitation and Retrofitting (ICCRRR2008) CRC Press.