[Retracted] Test and Detection of Antifreezing and Anticorrosion Performance of Carbon Nanofiber Bridge Concrete

Table 1

Main performance parameters of carbon nanotubes.

Exterior	Pipe diameter/nm	Length/μm	Carbon content/%	Noncarbon phase material	Ash/%	Raman G/D value	Degree of graphitization/%	Volume resistivity/()
Black powder	50–90	43–230	>97	Fe, S, O	<2.5	>5.5	>63	<35