DOI: 10.5176/2301-394X_ACE18.21
Authors: Israr Ahmed, *Anwar Khitab, Sajjad Ahmed, Muhammad Tausif Arshad and Liaqat Ali Qureshi
Abstract:
Ordinary concrete is a brittle material possessing low tensile and flexural strength. Incorporation of multi-walled carbon nanotubes (MWCNTs) in concrete is a modern technique to enhance its mechanical characteristics. This study focuses on the improvement in strength with the addition of MWCNTs. Concrete cylinders and beams were cast as per ASTM standards. CNTs were added at a rate of 0%, 0.15% and 0.20% by mass of cement. The dispersion of CNTs was achieved through ultrasonication after treating with a sulfonated naphthalene based surfactant. Strength tests were conducted at 3rd, 7th, 28th and 56th days as per ASTM standards. The results show an increase in compressive strength at older ages and, enhanced tensile and flexural strengths at all ages.
Keywords: Concrete; multi-walled carbon nanotubes; dispersion; compressive strength; tensile strength; flexural strength.
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