An Experimental Study on One-way Foamed Concrete Slabs Reinforced with Steel Bars

Document Type : Research articles

Authors

1 Faculty of Engineering, Mataria, Helwan University, Cairo, Egypt.

2 Structural Engineering department, Faculty of Engineering, L’Université Française D'Égypte, Cairo, Egypt.

Abstract

An experimental study was conducted to investigate the flexural behavior of foamed concrete (foamcrete) one-way slab specimens reinforced with steel bars. Structural Foamed Concrete (SFC) with an average dry density of 1600 kg/m3 and compressive strength of 25 MPa was used in this study. FC slabs were cast as orthotropic plates and their load-deflection response was predicted under a three-point bending configuration. A total of six reinforced foamed concrete slab specimens of dimensions 350 x 700 x 100 mm were tested. Two variables were considered: the polypropylene fiber content and the reinforcement ratio. Results demonstrated the reliability of using foamcrete (FC) with a dry density of 1600 kg/m3 and compressive strength of more than 25 MPa for structural use; as well as the mechanical property enhancement using various percentages of polypropylene fibers (PP) (by weight of cement). The PP ratio of 0.3% stood out as an optimal value that increased the slab-element ultimate load capacity by 9.7% also corresponding to a deflection decrease of 16.46%.

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