Author : Showkath Ali Khan 1
Date of Publication :7th August 2016
Abstract: High performance concrete (HPC) is a specialized concrete designed to provide several benefits in the construction of concrete structures. The use of fibres in concrete has gained enormous popularity in the last decade. Studies have shown increasing evidence that the brittle behavior of HPC can be overcome by the addition of short steel fibres of small diameter in the concrete mix. The present study aims to investigate the integration of Carbon Nano tubes ( CNTs )and steel fibers with HPC of a designed mix of M60 grade of concrete. The influence of the cementations material dosage, nano material, cement/ultra-fine ratio, percentage of fibers, and the mixing procedures on the mechanical properties of nano based carbon concrete was studied by preparing several concrete mixes. CNTs specifically designed for use with concrete composites as admixture. Six different concentrations such as 0.025%, 0.050%, 0.075%, 0.1%, 0.125% and 0.15% of CNTs by weight of cement were used. Carbon Nano tubes were first dispersed in water and surfactant using an ultrasonic mixer as per state-of-the-art techniques and then combined with fibre reinforced high performance concrete. The various mechanical properties like Compressive, Flexural and Split tensile strength can be improved with the addition of low concentrations of CNT in high performance fiber reinforced concrete.
- Gutierrez, P. A.; Canovas, M. F. (1996): HighPerformance Concrete: Requirements for Constituent Materials and Mix Proportioning, ACI Materials Journal, 93 (3), pp. 233-244.
- Bharatkumar, B. H.; Narayanan R.; Raghuprasad, B. K.; Ramachandramurthy, D.S. (2001): Mix proportioning of high performance concrete, Cement and Concrete Composites, 23, pp.71-80.
- Kaushik, S. K.; Kumar, V.; Bhargava, V. P (2002): Mechanical properties of High-strength concrete: A review, ICJ, pp.505-520
- Long, G.; Wang, X.; Xie, Y. (2002): Very-highPerformance Concrete with ultrafine powders, Cement and Concrete Research, Pergamon, 32, p.p 601-605.
- Chang, P. (2004): An approach to optimizing mix design for properties of high Performance concrete, Cement and Concrete Research, 34, pp. 623-629.
- Balaguru, P.; Najm, H. (2004): High Performance Fiber Reinforced Concrete Mixture proportions with High Fiber volume Fractions, ACT Material Journal, 101 (4), pp. 281- 285
- Wu, K. R.; Yan, A; Yao, W; Zhang, D. (2002): The influence of RPCA on strength and fracture toughness of HPC, Cement and Concrete Research, 32, pp. 351-355.
- Makar, J.; Margeson, J.; Luh, J. (2005): Carbon nanotube/cement composites early results and potential applications, 3rd International conference on construction materials: Performance, Innovations and Structural implications, Vancouver, B.C., pp. 1-10.
- Al-Rub, R. K. A.; Tyson, B. M. (2010): Assessment the potential of using Carbon nanotubes reinforcements for improving the tensile/flextural strengthand fracture toughness of Portland cement paste for damage resistant concrete transportation infrastructures, Texas transportation Institute Zachry Department of civil Engineering texas A&M University