Fracture Behavior of Concretes Incorporating Bone Powder.

Document Type : Research Studies

Authors

1 Assistant Professor., Faculty of Engineering., Zagazig University., Zagazig., Egypt.

2 Professor of Faculty of Engineering., Al-Azhar University., Nasr City., Egypt.

3 Professor of Faculty of Engineering., Zagazig University., Zagazig., Egypt.

Abstract

Using of wastes and by-products in the concrete has attained great potential in the last few years. This study investigates the use of bone powder as addition of cement and the influence of the bone powder content on the fracture behavior of concrete beans. All beams containing bone powder were compared to beams containing 10% of S.F addition. Tile cement content for concrete mixes was 500 Kg/m3. All specimens were tested at 28 days to study the effect of bone powder (B.P) content on the hardened properties of compressive strength and tensile strength of concrete. The water-cement ratio (WC) was 0.4 in all concrete mixes. In this study, four concrete mixes were made incorporating bone powder and silica fume [(0%), (5% bone powder), (5% bone powder and 5% silica fume), and (10% silica fume)] 
Results showed that concrete mixes could be successfully developed by incorporating bone powder in the mix. The mechanical properties of concrete mixes containing 5% bone powder and 5% silica fume were higher to those containing 10% SF powder. The compressive and tensile strengths of concrete mixes containing 5% of bone powder and 5 % silica fume Showed higher performance compared to other mixes. It was also observed that the fracture toughness of concrete mixes containing 5% bone powder and 5% silica fume increases as compared to other mixes. In addition, the fracture toughness based on Linear elastic fracture mechanics (LEFM) and energy concepts for all mixes was found to decrease with increasing crack-depth ratio (a/w).

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