28.9.2018 Lecture No. 17 Lecture Name: Geomaterial Characterization Sub-topics • Chemical characterization pH, TDS, EC, BOD, COD Sulphite and Chloride contents Cation-Exchange Capacity Pore-solution sampling Corrosion potential Sorption-Desorption • Thermal Characterization • Electrical Characterization
CHEMICAL CHARACTERIZATION • X-Ray Fluorescence (XRF) • Inductively Coupled Plasma (ICP) • pH value • Cation Exchange Capacity (CEC) • Pore solution analysis
XRF Pallets
Inductively Coupled Plasma Unit AAS
Calibration of XRF- Setup XRF Studies Physical Calibartion Chemical Calibration Elemental Composition (% by weight) of Materials Material Element CS WC IC RSS BSS FA-I FA-II C-I C-II GGBFS Si 15.78 20.32 11.52 39.21 40.71 25.53 28.30 24.65 23.62 15.56 Al 5.75 17.77 1.67 2.65 3.29 15.95 15.92 20.70 21.92 8.59 Fe 8.23 1.09 1.19 0.50 0.94 2.51 2.31 1.38 1.81 0.25 Ti 1.53 2.88 0.03 0.22 0.14 2.12 1.45 1.15 1.02 0.37 S - - 0.1 - - 0.01 0.23 0.11 0.03 0.39 Ca 4.58 0.27 38.9 001 0.01 3.20 0.11 0.06 0.10 26.50 K 0.54 0.06 0.13 2.42 1.49 0.77 0.55 1.07 1.14 0.19 Mg 0.99 0.45 0.48 0.09 0.19 0.33 0.24 0.41 0.24 5.52 P 0.07 0.02 5.0 0.01 0.02 0.18 0.25 0.12 0.06 0.02 Sr 0.02 0.00 0.14 - - 0.06 0.07 0.08 0.05 0.08 Ba - - - - - 0.66 0.07 0.11 0.12 0.06 Na 1.49 0.13 - 0.04 - 0.09 0.04 0.08 0.02 0.05 Mn 0.12 0.04 0.01 - 0.04 0.03 0.01 0.01 0.01 0.01 Si +Al+Fe 29.76 39.18 14.39 42.35 44.94 43.98 46.54 46.74 47.35 24.41
Cation-exchange Capacity Material CEC(meq./100g) 2 Concentrat ion of Ca ( g/ml) 100 Vol. of extract (ml) CEC CS 18.6 Equivalent weight of the cation 1000 wt. of sample (g) WC 5.0 IC 12.6 IS:2720 RSS 3.5 BSS 3.4 FA-I 4.5 FA-II 5.2 C-I 3.9 C-II 4.1 GGBFS Not applicable
pH determination Glass calomel electrode is used Soil solutions with different Liquid to solid ratios pH Temperature Total Dissolved Solids Electrical Conductivity Chemical Oxygen demand Biological Oxygen Demand
Chloride and Sulphite contents determination The chloride and sulphite contents of the soils can be obtained on an extract of 2:1 Liquid to solid ratio. Indion Easy test kit (Ion Exchange, India Ltd.), an ion exchange resin, is employed A sort of a titration Change in color of the solution due to addition of chemicals
Recommend
More recommend
