Journal of Materials / 2014 / Article / Tab 2

Research Article

Effect of Carbon Nanotube Size on Compressive Strengths of Nanotube Reinforced Cementitious Composites

Table 2

Properties and composition of surface treated MWNTs.

Types of MWNT and propertiesM2M3M4M5

Outside diameter (nm)20–3010–20 <8 8–15
Length (μm)10–30 10–30 10–30 10–30
Purity (wt%)>95>95>95>95
Ash (wt%)<1.5<1.5<1.5<1.5
Specific surface area, SSA (m2/g)>110>233>500>233
Electrical conductivity, EC (s/cm)>10−2>10−2>10−2>10−2
COOH content (wt%)1.232.003.862.56