THE DETERMINATION OF THEICL and ICC OF MATERIAL TO BE STABILISED.1 SCOPEThis method covers the determination of the lime demand of material to be used in limeand cementstabilisation. ltgives anindication whether thesoil inquestion can bestabilised.Thetest isdonebymixingthematerial passingthe0.425mmsievewithsetamounts of lime, creating a train of samples containing 0 lime to say !2. "y means of ap# meter the hydrogen ion concentration $p#% of each prepared sample&water suspensionismeasuredandagraphof p#vslimecontent isproduced, the'()&'((thenbeingdetermined from the graph. DefinitionThe p# of a suspension expresses the degree of al*alinity or acidity and can be defined asthe negative logarithmof the hydrogen ion concentration of the solution i.e. p#+log,#-..The practical p# range of a solution extends from 0 to !4, where theacid range + 0 to /al*alinity range+ / to !4.2 APPARATUS:2.! 0n electrically1operated, p#1meter with temperature compensation accurate to 0.02 p# units in the rangep#+0 to p#+!4.2.2 0 combination high al*aline glass&calomel reference electrode.2.2 p# meter calibration buffer solutions, normallyp# + 4 and p# + 32.4 0 balance to weigh up to !00g, accurate to 0.0!g.2.5 0 thermometer ranging from 0 deg( to 53 deg(.2.4 0 !00 ml measuring cylinder.2./ 0 polythene wash bottle with distilled water. 2.5 6olythene containers approximately 250 ml capacity with air1tiqht lids.3 METHOD:3.1 Pe!aation of Mateia".6repare at least !000 grams of material finer than 0.425mm and oven dry at !!0deg(. 7eighout tenx50gportionsof thepreparedmaterial, accuratelyto0.!g, into250mlpolyethalenecontainers.7eighout thecalculated masses oflime&cement, accuratelyto0.0!g, in the proportions80, 0.5, !.0, !.5, 2.0, 2.0, 4.0, 4.0, 5.0, !0.0andaddthistotheweighedout samplesrespectively.9ha*ethecontainerstomixthelime&cement and material. :easure out !00 ml of carbon dioxide free distilled water andadd it to the mixture in the containers. $(arbon ;ioxide free distilled water can be made byboiling distilled and allowing it to cool to room temperature.9ha*ethesuspensionfor aminimumperiodof 20seconds.