METHODOLOGY 24 RESULT AND DISCUSSION 43
vi 2.2.1 Difference or Advantages of Resin Bonded sand Casting from Normal
Sand Casting 10 2.2.2 Composition of Resin Bonded Sand Casting . 10
2.3 Biodegradable Resin Bonded Sand casting 11 2.3.1 Resin Polyvinyl Alcohol and Modified Urea 11
2.3.2 Hardener Catalyst . 14 2.3.3 Composition 14
2.4 Properties of Sand Mould 14 2.4.1 Permeability 15
2.4.2 Moisture Content 18 2.4.3 Compressive Strength 19
2.4.4 Tensile Strength 20 2.4.5 Transverse Strength 21
2.4.6 Loss on Ignition LOI 22 2.4.7 Biodegradability 23
Chapter Summary 23