Abstract
This paper reports an experimental research program focused on studying composite floor systems consisting of carbon fiber mortar deck reinforced with steel bars and plain concrete topping. Mix design and manufacturing techniques for carbon fiber reinforced mortar were optimized based on Ref 1 to 4. Variables of the experimental program were the steel reinforcement ratio, and the thickness of carbon fibrous mortar Ten prototype composite specimens were constructed and tested in flexure under one-third point loading. The test results indicated that the proposed composite system exhibited comparable flexural load-deflection behavior compared to conventional reinforced concrete. With increasing steel reinforcement ratio, increase in flexural strength and toughness was achieved. No significant effect on flexural behavior was detected by reasonably reducing the thickness of carbon fiber mortar deck. Delamination (interfacial bond failure) between the carbon fiber mortar deck and the concrete topping was a dominant mode of failure. Use of shear keys is warranted for further research efforts on this topic.
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