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Dynamic Friction and Rolling Friction Coefficients Table

Dynamic Friction CoefficientRolling Friction CoefficientReference Information
MinMaxMeanStandard DeviationMinMaxMeanStandard DeviationTypeVerificationLocationReference
0.4rock (limestone)Values adopted for calibration of computer program at ISMESStrozza, ItalyAzzoni, A., and de Freitas, M.H. (1995) "Experimentally Gained Parameters, Decisive for Rock Fall Analysis". Rock Mechanics and Rock Engineering. 28(2)111-124.
0.55hard debris (earth and angular rock fragments with some boulders, compacted)
0.75soft debris (angular rock fragments and earth with some boulders, loose)
0.6medium debris (medium debris covering smooth rock, compacted)
0.6soft debris (earth with rock fragments, loose)
0.85mud in the ditch
0.6yard (artificially compacted ground)
0.40-0.45rock (limestone)0.3 m3 block sizeparameters evaluated both through back analysis and elaboration of in situ tests carried out at Strozza, Italy.Azzoni, A., La Barbera, G., and Zaninetti, A. (1995) "Analysis and Prediction of Rockfalls Using a Mathematical Model". Int. J. Rock Mech. Min. Sci. & Geomech. Abstr. 32(7)709-724.
0.50-0.60fine angular debris and earth, compacted (gravel and cobbles, dia < 20cm)
0.70-0.80fine angular debris and earth, soft
0.60-0.70medium angular debris with angular rock fragments (20-40cm)
0.70-1.00medium angular debris with scattered trees
0.65-1.20coarse angular debris with angular rock fragments (40-120 cm dia)
0.55-0.65earth with grass and some vegetation
0.85ditch with mud
0.50-0.65yard (flat surface of artificially compacted ground)
0.40-0.45road
0.4rock (limestone)1.2 m3 block size
0.4fine angular debris and earth, compacted (gravel and cobbles, dia < 20cm)
0.60-0.70fine angular debris and earth, soft
0.50-0.60medium angular debris with angular rock fragments (20-40cm)
0.70-1.00medium angular debris with scattered trees
0.60-0.80coarse angular debris with angular rock fragments (40-120 cm dia)
0.45-0.50earth with grass and some vegetation
0.85ditch with mud
0.50-0.65yard (flat surface of artificially compacted ground)
0.40-0.45road
0.970.184rock/thin debrisbased on site testsStrozza, Italy (1)Azzoni, A., et al. "In situ observation of rockfall analysis parameters". Proceedings of the VI International Symposium on Landslides, Christchurch. February 10-14, 1992.
0.750.159fine debrisStrozza, Italy (2)
0.390.117debris and earthCagliari
0.880.24coarse debrisVal Malenco
1.310.163rockLuserna
0.840.301coarse debrisIselle
0.1clear quartzfriction coefficients for three conditions of surface moisture: oven-driedN. CarolinaHorn, H.M., and Deere, D.U. (1962) "Frictional Characteristics of Minerals". Geotechnique. 12(4)319-335.
0.14milky quartzWisconsin
0.11rose quartzUnknown
0.11microcline feldspar - AUnknown
0.12microcline feldspar - BUnknown
-Calcite (scratching)N. Jersey
-Calcite (N.S.)N. Jersey
0.14Calcite (N.S.)Kansas
0.43MuscovitePenna.
0.41MuscoviteBrazil
0.45MuscoviteUnknown
0.31PhlogopiteMadagascar
0.3PhlogopiteCanada
0.31BiotiteCanada
0.53ChloriteVermont
0.62SerpentineVermont
0.76SerpentineUnknown
0.38SteatiteNorth Carolina
0.36TalcVermont
0.1clear quartzfriction coefficients for three conditions of surface moisture: oven-dried air equilibratedN. Carolina
0.16milky quartzWisconsin
0.11rose quartzUnknown
0.11microcline feldspar - AUnknown
0.12microcline feldspar - BUnknown
0.21Calcite (scratching)N. Jersey
0.12Calcite (N.S.)N. Jersey
0.14Calcite (N.S.)Kansas
0.3MuscovitePenna.
0.32MuscoviteBrazil
0.36MuscoviteUnknown
0.25PhlogopiteMadagascar
0.22PhlogopiteCanada
0.26BiotiteCanada
0.35ChloriteVermont
0.47SerpentineVermont
0.65SerpentineUnknown
0.26SteatiteNorth Carolina
0.24TalcVermont
0.23clear quartzfriction coefficients for three conditions of surface moisture: saturatedN. Carolina
0.27milky quartzWisconsin
0.26rose quartzUnknown
0.76microcline feldspar - AUnknown
0.77microcline feldspar - BUnknown
0.6Calcite (scratching)N. Jersey
-Calcite (N.S.)N. Jersey
0.68Calcite (N.S.)Kansas
0.23MuscovitePenna.
0.22MuscoviteBrazil
0.26MuscoviteUnknown
0.15PhlogopiteMadagascar
0.16PhlogopiteCanada
0.13BiotiteCanada
0.22ChloriteVermont
0.26SerpentineVermont
0.48SerpentineUnknown
0.19SteatiteNorth Carolina
0.16TalcVermont
0.74slatefrictional coefficient at the displacement of 1.8 mmUnknownOnaka, M. (1975) "Frictional Characteristics of Typical Rocks". J. Phys. Earth. 23:87-112.
0.76TuffUnknown
0.78TrachyteMizuho
0.87AndesiteManazuru
0.76GraniteInada
0.68MonzoniteOrikabe
0.53Serpentiniteunknown
0.44
0.31dolomiteDunham
0.36
0.42LimestoneSolenhofen
0.38
0.35MarbleYamaguchi
0.44
0.5760.13Rockbased on in-situ testsChau, K.T., Wong, R.H.C, and Lee, C.F. (1998) "Rock fall problems in Hong Kong and some new experimental results for coefficients of restitution". International Journal of Rock Mechanics and Mining Science. 35(4/5):662-663.
0.5620.0867Soil
0.5590.118Shotcrete
0.5570.054Rock/soil
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