Laserfiche WebLink
Lake Front <br />Ramsey, Minnesota <br />NTI Project No. 18.MSP05470.000 <br />CLASSIFICATION OF SOILS FOR ENGINEERING PURPOSES <br />ASTM Designation D-2487 and D2488 (Unified Soil Classification System) <br />Major Divisions <br />Group Typical Name <br />Symbol <br />Classification Criteria <br />Course Grained Soils <br />Fine Grained Soils <br />More than 50% retained on No. 200 sieve * <br />More than 50% passes No. 200 sieve * <br />v <br />L7 <br />c0 <br />U <br />CO <br />U <br />CO <br />C.7) <br />50% or more of coarse fraction <br />More than 50% of coarse fraction <br />v <br />0 <br />O <br />0 <br />E <br />J <br />5 <br />0 <br />J <br />0 <br />retainer] nn Nn 4 sieve_ <br />nasses Nn 4 sieve_ <br />Clean Sands <br />Sands with <br />Well —graded gravels and <br />GW gravel -sand mixtures, little <br />or no fines. <br />Poorly graded gravels and <br />GP gravel -sand mixtures, little <br />or no fines. <br />GM <br />GC <br />Silty gravels, gravel -sand - <br />silt mixtures. <br />Clayey gravels, gravel -sand - <br />clay mixtures. <br />Well -graded sands and <br />SW gravelly sands, little or no <br />fines. <br />Poorly -graded sands and <br />SP gravelly sands, little or no <br />fines. <br />SM <br />SC <br />Silty sands, sand -silt <br />mixtures. <br />Clayey sands, sand -clay <br />mixtures. <br />Inorganic silts, very fine <br />ML sands, rock flour, silty or <br />clayey fine sands. <br />CL <br />OL <br />Inorganic clays of low to <br />medium plasticity, gravelly <br />clays, sandy clays, silty <br />clays, lean clays. <br />Organic silts and organic <br />silty clays of low plasticity. <br />Inorganic silts, micaceous <br />MH or diatomaceous fine sands <br />or silts, elastic silts. <br />CH <br />OH <br />Pt <br />Inorganic clays of high <br />plasticity, fat clays. <br />Organic clays of medium to <br />high plasticity. <br />Peat, muck and other <br />highly organic soils. <br />0 <br />a <br />as <br />as <br />4, <br />0 <br />u <br />0- <br />1- <br />0 <br />.N <br />cti <br />c <br />0 <br />0 <br />ca <br />9- <br />ea <br />V <br />GW, GP, SW, SP <br />GM, GC, SM, SC <br />a; <br />a) <br />O <br />0 <br />ra <br />O <br />z <br />c <br />Q <br />N <br />c <br />co <br />a) <br />0 <br />2 <br />v <br />w0 <br />c <br />0 <br />v <br />c <br />0 <br />U <br />a) <br />c <br />0) <br />0 <br />m <br />a. <br />v <br />O <br />0 <br />N <br />O <br />z <br />tv0 <br />c <br />Q <br />N <br />r-I <br />0 <br />E <br />0 <br />L.L <br />0 <br />S2 <br />N <br />0 <br />Cu = D60 / D10 greater than 4. <br />Cz = (D30)2 / (D10 x D60) between 1 & 3. <br />Not meeting both criteria for GW materials. <br />Atterberg limits <br />below "A" line, or <br />P.I. less than 4. <br />Atterberg limits <br />above "A" line <br />with P.I. greater <br />than 7. <br />Atterberg limits <br />plotting in hatched <br />area are borderline <br />classifications <br />requiring use of dual <br />symbols. <br />Cu = D60 / D10 greater than 6. <br />Cz = (D30)2 / (D10 x D60) between 1 & 3. <br />Not meeting both criteria for SW materials. <br />Atterberg limits <br />below "A" line, or <br />P.I. less than 4. <br />Atterberg limits <br />above "A" line <br />with P.I. > 7. <br />Atterberg limits <br />plotting in hatched <br />area are borderline <br />classifications <br />requiring use of dual <br />symbols. <br />OH&MHSoils <br />A) <br />J <br />Q <br />8 <br />U <br />OL&MLSoils <br />N ' <br />�o� <br />J <br />I ? <br />�UL <br />2 <br />oC o� g c <br />cL Soils <br />I. <br />6 O Up <br />U Ofl <br />1 N .E c <br />U "E J U <br />C � N <br />O <br />J <br />9 1 O <br />� a� aO I <br />C . Q <br />U m � <br />J <br />U <br />