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