Cement Pastes and Mortars Containing Nitrogen-Doped and Oxygen-Functionalized Multiwalled Carbon Nanotubes

Table 2

Comparison of our work with other reports on the mechanical properties of mortars containing multiwalled carbon nanotubes (MWCNTs). The values of the nanotube concentration (% MWCNTs/cement weight), mechanical properties (flexion, tension, or compression), additional materials or complements (MWCNTs and other materials), and carbon nanotubes treatment are indicated. FUNC (functionalized MWCNTs), US (ultrasonic dispersion), SF (surfactant), SP (superplasticizer), IN SITU (growth of MWCNTs on cement grains).

Reference	% MWCNTs	% improvement	Test	Complement	Treatment
This work	0.1	30%	Compression	MWNCT-N + MWCNT-O	US
Metaxa et al. [1]	0.8	—	Compression	MWNCT	US + SF
Collins et al. [29]	0.1	25%	Compression	MWNCT	US + SP + CBX
Kordkheili et al. [2]	0.5	0	Compression	MWNCT + nanofibers	US + SF
Ludvig et al. [3]	0.3	8%	Compression	MWNCT	IN SITU + SP
Morsy et al. [4]	0.02	29%	Compression	MWNCT + metakaolin	US + SP
Li et al. [24]	0.5	19%	Compression	MWNCT FUNC	US + SP
Musso et al. [22]	0.5	17%	Compression	MWNCT	US + SP
Musso et al. [22]	0.5	−80%	Compression	MWNCT FUNC	US + SP
Nochaiya and Chaipanich [5]	1.0	17%	Compression	MWNCT	US + SP
Torkittikul and Chaipanich [6]	1.0	10%	Compression	MWNCT	US + SP
Chaipanich et al. [32]	1.0	10%	Compression	MWNCT	US + SP
Nasibulina et al. [8]	—	100%	Compression	MWNCT + nanofibers	US + SP
Wille and Loh [9]	0.02	—	Compression	MWNCT + steel fibers	US + SP
Cwirzen et al. [28]	0.15	50%	Compression	MWNCT FUNC	US + SP
Yakovlev et al. [10]	0.05	70%	Compression	MWNCT	IN SITU + SP
Abu Al-Rub et al. [30]	0.1	269%	Flexion	MWNCT	US + SP
Tyson et al. [31]	0.2	150%	Flexion	MWNCT + nanofibers	US + SF
Hunashyal et al. [7]	0.5	50%	Tension	MWNCT + fibers	US + SP