Comparison of 9.5 mm SuperPave and Marshall Wearing I Mixes in ...

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9Table 2.1 WVDOH Aggregate Requirements for the Marshall Mix Design MethodCoarse AggregateGravel and Crushed StoneThin or elongated particles (4:1 ratio)ShaleCoal and other lightweight materialsFriable particlesPercent wear (LA abrasion)Soundnessclean hard durable rock free from adherentcoatings.5% max1% max1.5% max0.25% max40% max12% maxAdditional Gravel and Crushed Particle RequirementsBituminous Base IAll other asphalt concretemin 80% one fractured facemin 80% two fractured facesFine AggregateMust meet requirements of ASTM D 1073,except gradation.Mineral FillerMust meet requirements of ASTM D 242except for gradation and must be free ofharmful organic compounds.The WVDOH Marshall gradation requirements for the mix studied in the research, Wearing I,are:
10SieveAllowable PercentPassing Sieve1/2” 1003/8” 85 – 100#4 80 max#8 30 - 55#200 2.0 – 9.0The percent material passing a sieve when blending multiple stockpiles is computed as (Robertset al, 1996):P aA Bb Cc[2.1]Where,P = percentage of material passing a given sieve for the combined aggregates A, B, C,…A, B, C,… = the percent of material passing a given sieve for each aggregatea, b, c,… = proportions of aggregates A, B, C,… to be used in the blend,a + b + c… = 1.00.The combined specific gravity of an aggregate blend is needed to correctly calculate eachcompacted sample of asphalt pavement. The equation used to determine the combined specificgravity is:GP1P1G1P2P2G2PnPnG3[2.2]Where,G = combined specific gravityG 1 , G 2 , … , G n = specific gravity values for fraction 1, 2, … nP 1 , P 2 , … , P n = weight percentages of fraction 1, 2, … n.Once a suitable gradation is determined, Marshall samples are compacted. The WVDOH uses 75and 50 blows per side for heavy and medium traffic volume designs, respectively. The Marshall
Page 1 and 2: COMPARISON OF 9.5 MM SUPERPAVE ANDM
Page 3 and 4: iNOTICEThe contents of this report
Page 5 and 6: iiiasphalt concrete wearing courses
Page 7 and 8: vMixing Procedure 78Appendix B Fine
Page 9 and 10: viiTable C-7 Marshall Medium 13% NS
Page 13 and 14: 4Table 1.1 Mix Design Types in Expe
Page 15 and 16: 6CHAPTER 2 LITERATURE REVIEW2.1 INT
Page 17: 82. determine aggregate stockpile b
Page 21 and 22: 12Stability is recorded as the maxi
Page 23 and 24: 14The WVDOH procedure for determini
Page 25 and 26: 16sieve. This is somewhat different
Page 27 and 28: 18G sb = bulk specific gravity of a
Page 29 and 30: 20theoretical gravity at the initia
Page 31 and 32: 22D/B est = adjusted dust to binder
Page 33 and 34: 24P b,est - 0.5%,P b,est ,P b,est +
Page 35 and 36: Percent Passing261009080Superpave U
Page 37 and 38: 28Table 2.6 WVDOH Marshall and Supe
Page 39 and 40: 30Table 2.9 Habib Marshall Analysis
Page 41 and 42: 32theoretically correct in that the
Page 43 and 44: 34the machine. This variability was
Page 45 and 46: 36CHAPTER 3 EQUIPMENT3.1 INTRODUCTI
Page 47 and 48: 38Hose PressureWheel Load100 psi100
Page 49 and 50: 40mouth. This jar rests on a holder
Page 51 and 52: problematic, as the saturated surfa
Page 53 and 54: 44Mechanical Laboratory Sieve. Afte
Page 55 and 56: Percent Passing4610090100% Limeston
Page 57 and 58: 48Maximum specific gravity is a req
Page 59 and 60: 50gradation. This allowed for direc
Page 61 and 62: Percent Passing521009080Light 100%
Page 63 and 64: 54percentage of aggregate from the
Page 65 and 66: 56Table 5.4 Summary of Volumetric a
Page 67 and 68: 58Table 5.5 Calculated and Adjusted
Page 69 and 70:
60Table 5.6 Results of APA TestsAir
Page 71 and 72:
62exhibit lower rut depths than any
Page 73 and 74:
design had significantly more rutti
Page 75 and 76:
66SP L 100LS SP L 64NS -10.335 2.77
Page 77 and 78:
68percent air voids and percent lim
Page 79 and 80:
Air Voids (%)Uncompacted Voids (%)7
Page 81 and 82:
72than the Marshall mixes. Table 6.
Page 83 and 84:
Voids in the Mineral Aggregate. As
Page 85 and 86:
76REFERENCESAmerican Association of
Page 87 and 88:
78APPENDIX A BUCKET MIXER INSTRUCTI
Page 89 and 90:
80APPENDIX B FINE AGGREGATE ANGULAR
Page 91 and 92:
82Table B-3 Uncompacted Void Conten
Page 93 and 94:
84AGGREGATE DESIGN DATATable C-1 St
Page 95 and 96:
86Table C-3 Computed Blend Gradatio
Page 97 and 98:
88Table C-7 Marshall Medium 13% NS
Page 99 and 100:
90%G mm%AC VMA VTM VFA @ N ini @N d
Page 101 and 102:
92Table C-14 Superpave Light 64% NS
Page 103:
946 2979.3 1696.7 2988.1 2.307 7.09
Page 106 and 107:
971 2912.7 1620.8 2917.9 2.246 7.65
Page 108 and 109:
992 8.40 10.80 7.402 7.90 9.90 7.80
Page 110 and 111:
1011 9.50 6.90 11.502 9.79 7.15 10.
Page 112 and 113:
1032 8.55 5.20 5.95L R RDate Tested
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Comparison of 9.5 mm SuperPave and Marshall Wearing I Mixes in ...

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