Abstract
This paper presented the effect of a multiwalled carbon nanotube (CNT) in a cement paste composite mixture. In this study, various cement-CNT composites and an equivalent control mix were prepared by replacing 0.5, 0.75, and 1.0 % of cement with CNTs (by weight of cement). Different tests, such as compressive and flexural strength as well as freezing and thawing resistance of the CNT composites, were conducted. Cylindrical specimens of approximately 15.8 by 31.6 mm and beam specimens of approximately 20 by 20 by 80 mm were prepared for compressive and flexural strength tests. The specimens were tested at 7, 28, 60, 90, and 180 days of curing. Results showed that compressive and flexural strength increased with respect to control mix when 0.5 % CNT was added to the cement. The performance of cement-CNT composites against freezing and thawing action was inferior to that of the control mix. The relative dynamic modulus (RDM) of cement-CNT composites decreased more rapidly than that of the control mix. In addition, cement-CNT composites exhibited a faster rate of mass loss and length expansion than the control mix.
Issue Section:
Research Papers
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