Role of Dispersion of Multiwalled Carbon Nanotubes on Compressive Strength of Cement Paste

The outstanding mechanical properties of Carbon 
nanotubes (CNTs) have generated great interest for their potential as 
reinforcements in high performance cementitious composites. The 
main challenge in research is the proper dispersion of carbon 
nanotubes in the cement matrix. The present work discusses the role 
of dispersion of multiwalled carbon nanotubes (MWCNTs) on the 
compressive strength characteristics of hydrated Portland IS 1489 
cement paste. Cement-MWCNT composites with different mixing 
techniques were prepared by adding 0.2% (by weight) of MWCNTs 
to Portland IS 1489 cement. Rectangle specimens of size 
approximately 40mm × 40mm ×160mm were prepared and curing of 
samples was done for 7, 14, 28 and 35days. An appreciable increase 
in compressive strength with both techniques; mixture of MWCNTs 
with cement in powder form and mixture of MWCNTs with cement 
in hydrated form 7 to 28 days of curing time for all the samples was 
observed.

 





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