This paper presented results of a series of single-lap shear bond tests to clarify the bond force transfer capacity of carbon fiber sheet (CFS)-concrete interface, in which resin was treated as a main experimental parameter. Influences of different epoxy resins’ Young’s Modulus (0.35~3GPa), and different adhesive layer thickness (0.5mm, 1.0mm, 2.0mm) were observed. CFS stiffness (1 to 3 layer CFS) was also changed to compare effects of resins in the cases of different FRP sheet/adhesive stiffness ratio. Based on the experimental results, influences of resins on tensile strength of CFS, force transfer capacity of CFS-concrete interface and failure types were discussed. It could be seen from the experiments that changing thickness of resins in adhesive layer from 1.0mm to 2.0mm will increase the interface force transfer capacity significantly especially in the case of CFS-concrete interface with 3 layers CFS. Applying moderately soft resins can improve the load transfer capacity of CFS-concrete interface as well. However, it must be noted that harmful decrease of CFS tensile strength will be brought out by using low-Young’s modulus resin as CFS immersing matrix. As a result, during the sheet bonding construction period soft resin can be regarded as a choice of not immersing matrix but interface bond adhesive. Based on the analysis of experimental data, a sandwich bonding system was proposed to improve the bond effects of CFS-concrete interface.
|Number of pages||382|
|Publication status||Published - 2001|
|Event||Proceeding of the 7th Japan International Society for the Advancement of Material and Process Engineering (SAMPE) - Tokyo International Exhibition Center, Tokyo, Japan|
Duration: 13 Nov 2001 → 16 Nov 2001
|Conference||Proceeding of the 7th Japan International Society for the Advancement of Material and Process Engineering (SAMPE)|
|Period||13/11/01 → 16/11/01|