Heating Experiment of CNT Cementitious Composites with Single-Walled and Multiwalled Carbon Nanotubes

Table 1

Mechanical and physical characteristics of the MWCNTs and SWCNTs.

	MWCNT	SWCNT	Notes
Structure	Diameter: 5−100 nm	Diameter: 0.5–3.0 nm	—
	Length: 100 nm–1 cm	Length: 100 nm–1 cm
Modulus of elasticity	0.3–0.95 TPa	1.0–5.0 TPa	0.1–0.14 TPa
			(Cement mortar)
Tensile strength	11–63 GPa	13–53 GPa	0.002–0.01 GPa
			(Cement mortar)
Density	1.6 g/cm^3	1.33–1.40 g/cm^3	2.7 g/cm^3
			(Al)
Electrical conductivity	~6,000 S/cm	~10,000 S/cm	5,810 S/cm
			(Cu)
Heat conductivity	Max. 3,000 W/m·k	Max. 6,000 W/m·k	3,320 W/m·k
			(Diamond)