Recently, a Multi-Walled Carbon Nano Tube(MWCNT) is widely used to increase mechanical strength of the cementitious composite material. In this study, a dilution of MWCNT aqueous solution(from wt 2.0%, 1.5% to wt 1.0%) is a main parameter. A compressive strength of diluted CNT cement mortar is maximum 4.7% larger than that of a pure CNT cement mortar. The result indicates that the diluted MWCNT aqueous solution of the MWCNT cement mortar makes very little differences of the compressive strength.

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