Shear Behavior of Reactive Powder Concrete Beams with and without Coarse Aggregate

Document Type : Research Article


Highway and Transportation Engineering Department, College of Engineering, Al-Mustansiriyah University, Baghdad, IRAQ


This paper presents an experimental investigation consists of casting and testing in shear seven rectangular simply supported reinforced concrete beams. Two of the tested beams are made with reactive powder concrete (RPC) without coarse aggregate and five with reactive powder concrete with coarse aggregate which is called modified reactive powder concrete (MRPC). Experimental results have generally shown that coarse aggregate had a positive effect on shear behavior of MRPC beams and higher ultimate loads (Pu) are obtained with the increase of steel fibers volumetric ratio (Vf) and longitudinal steel ratio (ρ). Results also showed that using relatively high steel fiber ratio of 2% changes the mode of failure from brittle shear to ductile flexural one. It is, therefore, concluded that RPC and MRPC beams can be made without transverse shear reinforcement bars (stirrups).


[1] Noshiravani, T. and Bruhwiler, E., Experimental Investigation on Reinforced Ultra-High-Performance Fiber-Reinforced Concrete Composite Beams Subjected to Combined Bending and Shear , ACI Structural Journal, 110(2) (2013) 251-261.
[2] Lai, J., Sun, W., Xu, S. and Yang, C., Dynamic Properties of Reactive Powder Concrete Subjected to Repeated Impacts, ACI Materials Journal, 110(4) (2013) 463-472.
[3] Susetyo, J., Gauvreau, P. and Vecchio, F., Effectiveness of Steel Fiber as Minimum Shear Reinforcement, ACI Structural Journal, 108(4) (2011) 488-496.
[4] Wille, K., Naaman, A.E., and El-Tawil, S., Optimizing Ultra-High-Performance Fiber-Reinforced Concrete, Concrete International, (2011) 35-41.
[5] Voo, Y.L., Nematollahi, B., Said, A.M., Gopal, B.A., and Yee, T. S., “Application of Ultra High Performance Fiber Reinforced Concrete – The Malaysia Perspective”, International Journal of Sustainable Construction Engineering and Technology, Vol.3, No.1, 2012, pp.26-44.
[6] Richard, P. and Cheyrezy, M., Composition of ReactivePowder Concrete, Cement and Concrete Research, 25(7) (1995) 1501-1511.
[7] Collepardi, S., Copolla, L., Troli, R. and Collepardi, M., Mechanical Properties of Modified Reactive Powder Concrete, in Proceedings of Fifth CANMET/ACI International Conference on Superplasticizers and Other Chemical Admixtures in Concrete, Rome, Italy, ACI SP-173 (1997) 1-21.
[8] Ma, J., Orgass, M., Dehn, F., Schmidt, D. and Tue, N.V., Comparative Investigation on Ultra-High Performance Concrete with and without Coarse Aggregates, in Proceedings of International Symposium on Ultra High Performance Concrete, 2004, Kassel, Germany, 205-212.
[9] Wille, K., Naaman, A. E., and Montesinos, G. J., Ultra-High Performance Concrete with Compressive strength Exceeding 150 MPa (22 ksi): A simple Way, ACI Materials Journal, 108(1) (2011) 46-54.
[10] Ashour, S., Hasanain, G. and Wafa, F., Shear Behavior of High-Strength Fiber Reinforced Concrete Beams, ACI Structural Journal, 89(2) (1992) 176-184.
[11] Kwak, Y., Eberhard, P., Kim, W. and Kim, J., Shear Strength of Steel Fiber-Reinforced Concrete Beams without Stirrups, ACI Structural Journal, 99(4) (2002) 530-538.
[12] Minelli, F. and Vecchio, F., Compression Field Modeling of Fiber Reinforced Concrete Members under Shear Loading, ACI Structural Journal, 103(2) (2006) 244-252.
[13] Voo, Y.L., Foster, S.J. and Gilbert, R.I., Shear Strength of Fiber Reinforced Reactive Powder Concrete Prestressed Girders without Stirrups, Journal of Advanced Concrete Technology, 4(1) (2006) 123-132.
[14] Ridha, M.M.S., Shear Behavior of Reactive Powder Concrete Beams, Ph.D. Thesis, Building and Construction Engineering Department, University of Technology, Baghdad, Iraq, (2010) 204.