The Effects of Aggregate Sizes and Fiber Volume Fraction on Bending Toughness and Direct Tension of Steel Fiber Reinforced Concrete

In order to supplement the brittle property of concrete, fibers are added into concrete mixtures. Compared to general concrete, various characteristics such as tensile strength, bending strength, bending toughness, and resistance to crack are superior, and even when cracks occur, improvements on toughness as well as resistance to shock are excellent due to the growth of fracture energy. Increased function of steel fiber reinforced concrete can be differentiated depending on the fiber dispersion, and sand percentage can be an important influence on the fiber dispersion. Therefore, in this research, experiments were planned on sand percentage in order to apprehend the influence of sand percentage on the bending properties and direct tension of SFRC and basic experiments were conducted on bending and direct tension in order to recognize the properties of bending properties and direct tension following the size of the aggregates and sand percentage.

Authors:

• Hyun-Woo Cho
• Jae-Heum Moon
• Jang-Hwa Lee

Keywords:

• Steel Fiber Reinforced Concrete
• Bending Toughness
• Direct tension.

References:

[1] Kyu-Gun Kim, Cha-Don Lee, Jong-Sung Shim, Gi-Bong Choi, Jae-Sun
Park (1994) Theory Research on Tensile Fracture Mechanism of Steel
Fiber Reinforced Concrete, Thesis Collection of Korean Concrete
Conference, Vol.5 No.2, pp.140Ôê╝150
[2] Seo-Ho Jung, Hong-Yon Park (2007) Experimental Research on
Bending-Compression Behavior of SFRC, 2007 Thesis Collection
Regular Conference for Society of Civil Engineers, pp. 2346Ôê╝2349
[3] Hyun-Ho Lee, Hwan-Jin Lee (2004) Strength and Deformation Properties
of SFRC considering steel factors and volume fraction, Thesis Collection
of Korean Concrete Conference, Vol.16 No.6, pp. 759Ôê╝766
[4] Dong-Joo Kim, "Influence of Number of Twist on Tensile Behavior of
High Performance Fiber Reinforced Cementitious Composites with
Twisted Steel Fibers", Korea Concrete Institute, Vol. 22, No.4
,pp.575-583 (2010).
[5] RILEM Committee on Fracture Mechanics of Concrete-Test Methods,
"Determination of the Fracture Energy of Mortar and Concrete by Means
of Tree-Point Bend Tests on Notched Beams",
MaterialsandStructures,Vol.18,No.106,pp.285-290(1985)
[6] Dong-Joo Kim, "Measurement of Tensile Properties of Fiber Reinforced
Concrete", KoreaConcreteInstitute,Vol.21,No.6,pp.94-97(2009).
[7] Gyu-Seon Kim et al., "Analysis on the Fracture Mechanisms of SFRC
under Tension", KoreaConcreteInstitute,Vol.5,No.2,pp.140-150(1994).
[8] Shah. S. P., Rangan. B. V., "Fiber Reinforced Concrete Properties", J. of
ACI, Vol. 68, No.2, pp.126-135(1971).
[9] Karihaloo, B. L. and Nallathambi, P., "An Improved Effective Crack
Model for the Determination of Fracture Toughness of Concrete",
CementandConcreteResearch,Vol.19,pp.603-610(1989).