Cement, Energy and Environment

49 Materials & Experimental Program The materials used were cement-OPC (43 grade),fine aggregate (FA)-river sand conforming to zone II of IS:383-1970, potable water, admixture (super plasticizer)-PolyCarboxylate ether and nanomaterials (viz., nanosilica, carbon nanotubes and nanotitanium oxide). The following Tables (3 to 5) show the specific properties of nanosilica, carbon nanotubes and titanium dioxide used. Table-1 pecific Properties & XRD image of Nanosilica (SiO 2 ) Sample %Content(Lit.) Specific Gravity(Lab.) %Content(Lab.) Specific Gravity(Lit.) XLP 14-16% 1.12 21.4% 1.08-1.11 XTX 30-32% 1.16 40.74% 1.20-1.22 XFXLa 40-43% 1.24 41.935% 1.30-1.32 Table-2 Specific Properties of Multi-Walled Carbon Nanotubes (Industrial Grade) Item Description DIAMETER 20-40nm LENGTH 25-45nm PURITY 80-85%(a/c Raman Spectrometer & SEM analysis) AMORPHOUS CARBON 5-8% RESIDUE(CALCINATION INAIR) 5-6% byWt. AVERAGE INTERLAYER DISTANCE 0.34nm SPECIFIC SURFACEAREA 90-220 m 2 /g BULK DENSITY 0.07-0.32gm/cc REALDENSITY 1-8 gm/cc VOLUME RESISTIVITY 0.1-0.15 ohm.cm( measured at pressure in powder)