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STONE MASTIC ASPHALT RESEARCH PRESENTATION ROAD SYSTEM AND ENGINEERING
STONE MASTIC ASPHALT
RESEARCH PRESENTATION
ROAD SYSTEM AND ENGINEERING
PROBLEMS
SMA PERMEABILITY
Permeabilty of laboratory mixes
0.01
0.1
1
10
100
1000
0 1 2 3 4 5 6 7 8 9 10 11
% Voids
Perm
eabi
lity
um/S
Log. (DG14C320)
Log. (SM10 A5S)
Log. (SM14 A5S)
Log. (SM12 AB4)
Workability• Grading/nominal size• Binder content• Temperature• Binder type/characteristics• Mastic (filler/binder) characteristics
Filler CharacteristicsFiller Voids
(%)APD (t/m3)
%< 75 microns
Surf Area (m2/kg)
Flyash 54 2.19 97 165
Baghouse 41 2.72 89 545
Hyd Lime 52 2.23 75 1050
UFD 52 2.90 99 865
Ag Lime 39 2.69 75 215
Typical Range of SM14 Mixes
% passing 0.075 mm
% bitumen F/B ratio by mass
8 5.8 1.38
8 6.0 1.33
8 6.2 1.29
10 5.8 1.72
10 6.0 1.67
10 6.2 1.61
Flyash
Hydrated Lime
UFD
Baghouse
1:1 1.25:1 1.5:1 1.75:1Filler to Binder Ratio (by mass)
Viscosity v F/B Ratio by Mass - 165oC
0.1
1
10
100
1000
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2
F/B Ratio by Mass
Visc
osity
(Pa.
s)
Flyash (Swanbank)
Hydrated Lime (DML)Ultrafine Dust (Petrie)Baghouse Fines (BCW)
Shell p190 Compaction upperShell p190 Compaction lower
SMA PERMEABILITY
SMA PERMEABILITY
