SHEAR STRENGTHENING OF CONCRETE STRUCTURES WITH THE USE OF MINERAL-BASED COMPOSITES

Rehabilitation and strengthening of concrete structures have become more common during the last 10–15 years , partly due to a large stock of old structures and partly due to concrete deterioration. Also factors such as lack of understanding and the consequences of chloride attack affect the need for rehabilitation. In addition, more traffic and heavier loads lead to the need for upgrading. Existing externally bonded strengthening systems using fiber-reinforced polymers (FRP) and epoxy as bonding agents have been proven to be a good approach to repair and strengthen concrete structures. However, the use of epoxy bonding agents has some disadvantages in the form of incompatibilities with the base concrete. It is, therefore, of interest to substitute epoxy with systems that have better compatibility properties with the base concrete, for example, cementitious bonding agents. This paper presents a study on reinforced concrete beams strengthened in shear with the use of cementitious bonding agents and carbon f...

[1]  M. Raupach,et al.  Epoxy-impregnated textiles in concrete Load bearing capacity and durability , 2006 .

[2]  Deric J. Oehlers,et al.  IC debonding resistance of groups of FRP NSM strips in reinforced concrete beams , 2008 .

[3]  J. Teng,et al.  FRP-to-concrete interfaces between two adjacent cracks: Theoretical model for debonding failure , 2006 .

[4]  G. Monti,et al.  Tests and design equations for FRP-strengthening in shear , 2007 .

[5]  A. Brückner,et al.  Textile reinforced concrete for strengthening in bending and shear , 2005 .

[6]  Ulrich Dilthey,et al.  Application of polymers in textile reinforced concrete : fromthe interface to construction elements , 2006 .

[7]  Arnon Bentur,et al.  Fabric structure and its reinforcing efficiency in textile reinforced cement composites , 2003 .

[8]  Björn Täljsten,et al.  Photographic strain monitoring for civil engineering , 2004 .

[9]  Angelica Svanbro,et al.  Speckle Interferometry and Correlation Applied to Large-Displacement Fields , 2004 .

[10]  B. Täljsten,et al.  Theoretical Study Of Strengthening For Increased Shear Bearing Capacity , 2005 .

[11]  Thomas Blanksvärd,et al.  Strengthening of concrete structures by the use of mineral based composites : system and design models for flexure and shear , 2007 .

[12]  Thomas Blanksvärd,et al.  Mineral-Based Bonding of Carbon FRP to Strengthen Concrete Structures , 2007 .

[13]  A. Wiberg.  Strengthening of concrete beams using cementitious carbon fibre composites , 2003 .

[14]  Björn Täljsten,et al.  Concrete Beams Strengthened with Prestressed Near Surface Mounted CFRP , 2006 .

[15]  L. Courard.  Adhesion of repair systems to concrete: influence of interfacial topography and transport phenomena , 2005 .

[16]  Arnon Bentur,et al.  Effects of Woven Fabric Geometry on the Bonding Performance of Cementitious Composites , 1998 .

[17]  T. Triantafillou,et al.  Shear strengthening of reinforced concrete members with textile reinforced mortar (TRM) jackets , 2005 .

[18]  Jonas Carlswärd,et al.  Shrinkage cracking of steel fibre reinforced self compacting concrete overlays: test methods and theoretical modelling : test methods and theoretical modelling , 2006 .

[19]  Anders Carolin,et al.  Concrete Structures Strengthened with near Surface Mounted Reinforcement of CFRP , 2003 .