Architectural

Experimental Verification of Concrete Elements Strengthened with UHPFRC

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Abstract

UHPFRC may be used for new structures, but it is also an excellent material for strengthening of existing structures. Such strengthening is very efficient mainly because of the excellent bond between UHPFRC and existing concrete and for its high strength. Low amount of added material may result in significant mechanical effect which makes such method economical. The experimental research is focused on investigation of bond between existing concrete and UHPFRC and on testing of large-scale elements at different loading situations. The precast elements about 10 years old were used first for investigation of bond. Their surface was prepared by different ways (high pressure water spraying, sand blasting, etc. in some cases in combination with adhesive layer between existing concrete and UHFRC added layer). A bond between existing concrete and a new UHPFRC layer was tested by direct tensile test on drilled cores and by pull-off tests. The first series of large-scale tests is focused on short term and long term bending tests. The results will be reported in the paper.

Keywords: experiment, bond, UHPFRC, concrete structures, bending test, strengthening, Ultra-high performance fibre-reinforced concrete

How to Cite:

Citek, D., Vítek, J. L., Coufal, R., Čítek, A., Kryštov, M. & Kudrnáčová, L., (2019) “Experimental Verification of Concrete Elements Strengthened with UHPFRC”, International Interactive Symposium on Ultra-High Performance Concrete 2(1). doi: https://doi.org/10.21838/uhpc.9716