Effect of the height of reinforced concrete layer on the mechanical properties of functionally graded concrete incorporating fly ash and polypropylene fiber

  • Vo Minh Luan Department of Construction Materials, Faculty of Civil Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam
  • Bui Phuong Trinh Department of Construction Materials, Faculty of Civil Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam
  • Dang Quoc Viet Faculty of Bridge and Road Construction, Mien Trung University of Civil Engineering (MUCE), 24 Nguyen Du Street, Ward 7, Tuy Hoa City, Phu Yen Province, Vietnam
  • Huynh Trong Phuoc Department of Civil Engineering, College of Engineering Technology, Can Tho University, Campus II, 3/2 Street, Ninh Kieu District, Can Tho City, Vietnam
Keywords: functionally graded concrete, fly ash, polypropylene fiber, compressive strength, flexural strength, flexural toughness

Abstract

The present research aims to investigate the influence of the ratio of reinforced concrete layer height to total height (h/H) on the mechanical properties of functionally graded concrete (FGC) containing fly ash (Fa) and polypropylene (PP) fiber. All FGC samples were prepared with a constant water-to-cementitious materials ratio of 0.36 and ordinary Portland cement was replaced with Fa at 20% by mass. The reinforcement layer of FGC was enhanced with PP fiber inclusion (0.3% by volume of concrete). The effect of various h/H ratios of 0.25, 0.50, and 0.75 on the mechanical properties of the FGC samples was evaluated. The results show that flexural strength, flexural toughness, and compressive strength values of the FGC with PP fiber were higher than those of FGC without PP fiber at the age of 28 days regardless of Fa replacement. The experimental results also pointed out that the FGC samples prepared using an h/H ratio of 0.50 were beneficial in terms of mechanical properties.

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Published
16-08-2021
How to Cite
Luan, V. M., Trinh, B. P., Viet, D. Q., & Phuoc, H. T. (2021). Effect of the height of reinforced concrete layer on the mechanical properties of functionally graded concrete incorporating fly ash and polypropylene fiber. Journal of Science and Technology in Civil Engineering (STCE) - HUCE, 15(3), 30-43. https://doi.org/10.31814/stce.nuce2021-15(3)-03
Section
Research Papers