Experimental Investigation on the Effect of Nano Carbon Tube on Concrete Strength

Document Type : Original Article


Department of Civil Engineering, Islamic Azad University, Ahvaz Branch, Khouzestan, Iran.


This work presents in evaluation in regard to the addition of CNTs dispersion in water ultrasound before it incorporation to concrete mass. The dispersion of carbon Nano tubes have been achieved by use of surfactants and other chemical compounds along with vigorous agitation by signification. The various researches have reported varied results experimenting with different amounts of CNTs and different dispersion techniques leading to a conclusion that 0.03 to 0.5% additions of CNTs to cement enhance the properties greatly. Nano particles are filled the porosity of concrete, therefore reduced permeability and increased the concrete strength and its sustainability. In this research, Nano carbon tube for enhancing the physical properties was used. For the experimental work in this research 5 control specimens 50 x 50 x 50 mm and 5 samples containing 0.03% Nano carbon as percentage of sand and cement, specimens were made based on ASTM C349. With considering the results obtained from experiment, the 0.03% CNT multi wall added to the mortar the strength increased by 39%, this can be attributed to the dispersion of CNT in concrete and protecting concrete from progressive cracks. In the other words, treated CNT in composite concrete matrix, provided more surface connection due to high specific areas resulted transferring more forces, so they provided better connection, therefore preventing matrix surrounding from any micro-structures cracks of the samples were also improved properties greatly.


Main Subjects

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Volume 4, Issue 1
March 2020
Pages 31-41
  • Receive Date: 19 December 2019
  • Revise Date: 30 January 2020
  • Accept Date: 17 February 2020
  • First Publish Date: 01 March 2020