Laserfiche WebLink
MAJOR DIVISIONS GROUP <br />SYMBOLS TYPICAL NAMES <br />G'*i Well graded grovels, grovel - sond mixtures,?'49 Gw little or no fines.CLEAN 2 ...:2 <br />GRAVELS 4.·. · <br />(Little or no fines ) ·Wo':"Poorly graded gravels or gravel-sond mixtures, <br />GRAVELS :9:06€ GP litlle or no fines.• o Ot. <br />(More than 50% of <br />coarse fraction is <br />LARGER than the Silty grovels, grovel- sand-silt mixtums. <br />No. 4 sieve size)GRAVELS <br />WITH FINES <br />COARSE (Appreciable amt. <br />Cloyey grovets, gravel-sand-clay mixtures.of fines) <br />GRAINED <br />SOILS <br />(More than 50% of Well graded sonds, grovelly sands, little or <br />material is LARGER no fines. <br />Ihon No. 200 sieve CLEAN SANDSsize)(Little or no fines ) <br />Poorly graded sands or gravelly sands, little <br />SANDS or no fines. <br />(More than 50 % of <br />coarse fraction is <br />SMALLER than the Silly sands, sand-sili mixtures.No. 4 sieve size)SANDS <br />WITH FINES <br />(Appreciable amt.Cloyey sands, sand-clay mixtures.of fines ) <br />GC <br /> SM <br />q f. <br />7 Fl k <br />ML <br />Inorganic sills and very fine sands, rock flour, <br />silly or clayey fine sands or clayey sills <br />wilh slight plosticily. <br />SILTS AND CLAYS .llll Inorganic cloys of low to medium plasticity, <br />(Liquid limit LESS than 50)gravelly cloys, sandy clays, stlty cloys, leon <br />Cloys. <br />CL <br />FINE <br />GRAINED <br />SOILS <br />(More than 50 % of <br />material is SMALLER <br />than No. 200 sieve <br />size) <br />m 0L <br />MH <br />Organic silts and orgonic silly cloys of low <br />plosticity . <br />Inorgonic silts, micoceous or diatomaceous <br />fine sandy or silly soils, elastic silts. <br />SILTS AND CLAYS <br />(Liquid limit GREATER than 50) <br />1 OH <br />Inorgonic cloys of high plosticity, fat cloys. <br />Organic cloys of medium lo high plasticily, <br />organic silts. <br />HIGHLY ORGANIC SOILS pt Peol and other highly organic soils. <br />BOUNDARY CLASSIFICATIONS: Soils possessing characterislics of Iwo groups ore designated by <br />combinations of group symbols. <br />PART ICLE SIZE LIMITS <br />SAND GRAVEL <br />SILT OR CLAY COBBLESI BOULDERS <br />FINE MEDIUM COARSEE FINE COARSE <br />NO. 200 NO. 40 NO. 10 NO. 4 34 in.3 in.(12 in.) <br />U. S.STANDARD SIEVE S IZ E <br />UNIFIED SOIL CLASSIFICATION SYSTEM <br />Reference : <br />The Unified Soil Classification System, Corps of <br />Engineers, U. S. Army Technical Memorandum No. 3-357, <br />Vol. 1, March, 1953. (Revised April, 1960) <br />LEROY CRANDALL 8 ASSOCIATES <br />PLATE B