experimental investigation on the effect of nano carbon tube on concrete strength

experimental investigation on the effect of nano carbon tube on concrete strength

this work presents in evaluation regarding to the addition of cnts dispersion in water ultrasound before its incorporation into concrete mass. the dispersion of carbon nanotubes has been achieved by the use of carboxylate along with vigorous agitation by sonification. the various researches have reported varied results experimenting with different amounts of cnts and different dispersion techniques leading to a conclusion that 0.02% to 0.5% additions of cnts to cement enhance the properties greatly.

nanoparticles have filled the porosity of concrete, therefore reduced permeability and increased the concrete strength and its sustainability. in this research, the nanocarbon 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% nanocarbon as a percentage of sand and cement, specimens were made based on astm c349. in addition, water absorption test, sem tests, electrical resistance test which show the corrosion rate, and flexural strength tests were carried out on the control and 0.03% cnts specimens.

considering the results obtained from the experiment, the 0.03% cnt multi-wall added to the mortar the compressive strength increased by 39%; the electrical resistance increased by 78%, and flexural strength increased by about 13%. this can be attributed to the dispersion of cnt in concrete and protecting concrete from progressive cracks. in other words, treated cnt in the 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, also improved properties greatly.