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

Table 4

Heating experiment results for the CNT cement mortars.

Specimen name	CNT type	CNT content (wt%)	Curing age (days)	Supplied voltage (V)	Temperature variation (°C)	Specimen/OPC group
OPC-7-50 V	—	—	7	50	1.4	—
OPC-7-100 V				100	11.0	—
OPC-28-50 V			28	50	0.5	—
OPC-28-100 V				100	1.1	—
MW-0625-7-50 V	MWCNTs	0.0625	7	50	22.6	16.1
MW-0625-7-100 V				100	43.7	4.0
MW-0625-28-50 V			28	50	6.7	13.4
MW-0625-28-100 V				100	20.0	18.2
MW-125-7-50 V		0.125	7	50	33.3	23.8
MW-125-7-100 V				100	45.9	4.2
MW-125-28-50 V			28	50	3.7	7.4
MW-125-28-100 V				100	21.5	19.6
SW-0625-7-50 V	SWCNTs	0.0625	7	50	34.3	24.5
SW-0625-7-100 V				100	59.1	5.2
SW-0625-28-50 V			28	50	3.4	6.8
SW-0625-28-100 V				100	56.8	53.7
SW-125-7-50 V	SWCNTs	0.125	7	50	66.2	47.4
SW-125-7-100 V				100	70.6	5.9
SW-125-28-50 V			28	50	5.0	10
SW-125-28-100 V				100	65.3	64.2