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- - ----------- <br /> PROCEDURES FOR SOIL SAMPLES <br /> DESCRIPTION AND IDENTIFICATION <br /> 1. Description and Indentification of soil samples was conducted using ASTM <br /> Designation D 2488-84 'Standard Practice for Description and Identification of <br /> Soils(Visual-Manual It �c�n'p®t on as possible,procedure <br /> but et wmust as $b®ter®wed that thisis <br /> I� <br /> give <br /> isual-manual procedure. <br /> MCI STURE CONTENT <br /> 2. To determine the moisture content of the sample as preserved the sample Is <br /> weighed this weight is recorded as 'w', and than dried to a conslar4 weight using <br /> a heat source and weighed again, this weight recorded as 's'. The moisture <br /> content. 'm', is calculated mew-s/s 1 100(from ASTM D 221E-80). <br /> GRAVEL, SAND, AND FINE FRACTIONS <br /> 3. 200-400 grams of the dried sample is sieved ustrg a No. 4 slava, the portion <br /> passed is weighed and recorded as sand and fines. <br /> calculate the percenton age�® o� <br /> and recorded as gravel <br /> No. 4 sieve is Weighed <br /> gravel the weight of She gravel is divided by the weight of the original sample and <br /> multiplied by 100. The portion passim the No. 4 sieve is then wet sieved ung <br /> the No. 230 sieve and dried to a constant weight. The percentage of sand is <br /> then calculated by dividing the Portion retained onhoe fines3s calculated original the by <br /> j <br /> sample and multiplying by 100. The percentage <br /> w % subtracting the total weight of gravel and sand, subtracting that weight from the <br /> r` _ J original sample weight, dividing by the original sample weight, and rnu9tiplyinq by <br /> 100. <br /> Sample calculation <br /> 3OOg sample. weight retained on No. 4 sieve, gravel: 259 <br /> el <br /> weight retained on No. 230 sieve, sand: 125 <br /> weight passing No. 230 sieve. gravel { sand - 300508fines <br /> weight of fines: <br /> percentage gravel: 25/3000100= 8.3% <br /> percentage sand 125/301)'100= 41.7% <br /> percentage hilae 1501300'100- 50.0% <br /> I'I SIEVE ANALYSIS: <br /> 4. Sim analysis was performed as suggested by ASTM Designaliorx D 422-63 <br /> "Staridard Method for Particle-Size Analysis of Soils`. WEGE method modified <br /> the ASTM standard by using the following sieves <br /> 21/2• No. 7 <br /> 11/2" No. 35 <br /> 5/8° No. 60 <br /> 5/16w No. 120 <br /> I� Thee® sieves were chosenp closely follow the Wentworth scale for grain size <br /> ciassi ficatiorL <br />