Presents

Stantec Meeting

AgendaAgendaTopic Duration PresenterParticipant Introduction 5 Min Foster DiFiore

(DiFiore Group)

I. What is Foamed Asphalt? 15 Min Tim KowalskiI. What are its physical characteristics (Wirtgen

America)I. Expansion ratioII. Half lifeIII. Optimization

II. Foam mix design processII. Uses of Foamed Asphalt 15 Min Tim Kowalski

I. Cold In Place RecyclingII. Full DepthIII. Plant Produced

III. Job Specific Plant Produced illustrations (Web Driven) 18 Min Dave GaleazzoI. Lake Road Video Foster DiFioreII. Job Reports

I. Lake RoadII. Bernard's GroveIII. Sweden Town ParkIV. Webster SchoolsV. Xerox Re

IV. Testing QA/QC considerations 15 Min Greg Samios (EDP)I. Marshall mix considerationII. Layer coefficientsIII. Typical sections

V. Questions/Discussions 20 Min All

What is Foamed Asphalt?What is Foamed Asphalt?

Time controlled cleaning and closure of the nozzle

to other nozzles

Hot bitumen

Expansion chamber with foaming nozzle

Air Water

Foamed bitumen

What are its Physical What are its Physical CharacteristicsCharacteristics

Foam Mix Design ProcessFoam Mix Design Process

TSR vs. Foam Bitumen Content

0.00

0.10

0.20

0.30

0.40

0.50

1 2 3

Foamed Bi tumen Content (%)

TSR

Marshall Stability vs. Foamed Bitumen Content

0

50

100

150

200

250

300

350

400

450

500

1.0 2.0 3.0

Foamed Bi tumen Content (%)

Stability

Marshall Flow vs. Foamed Bitumen Content

0.000

0.050

0.100

0.150

0.200

0.250

1.0 2.0 3.0

Foamed Bi tumen Content (%)

FLow

Mix Gradation (.45 Pow er Graph)

0

10

20

30

40

50

60

70

80

90

100

0 1 2 3 4 5 6

Sieve Size (mm raised to .45 Power)

Per

cen

t F

iner

Mix Gradation Max Density

Dry Density vs. Foamed Bitumen Content

127.2

127.4

127.6

127.8

128.0

128.2

128.4

128.6

128.8

129.0

129.2

1.0 2.0 3.0

Foamed B i tumen C ontent (%) Avg Dry Density

100.0100.099.493.384.279.062.841.227.118.511.57.95.5% Passing

50.037.525.019.012.59.54.752.361.180.6000.3000.0150.075Sieve Size (mm

Mix #14 Aggregate Information

Aggregates Type Blend%

Millings DOT 12.5mm 80

#2 Stone Dolomite 15

Stone Dust Dolomite 5

Nominal Max Agg. Size (mm) = 19.00

Bitumen Type: AC 10

Bitumen Source: CitgoFoaming Temp.(oC): 160 - 170

% Foaming Water: 2.5

Optimum Bitumen Content: 2.0

Optimum Compaction Water: 8.2

Total Fluid Content(%): 10.2

Number of Blows (Each Face): 75

Tensile Strength Ratio: 0.39

Marshall Stability (lb): 347.2

Marshall Flow (in.): 0.1487

Dry Density (PCF): 127.4

Foamed Asphalt ProcessFoamed Asphalt Process

• In-Situ

Foamed Asphalt ProcessFoamed Asphalt Process

• Cold In Place Recycling

Foamed Asphalt ProcessFoamed Asphalt Process• Plant Produced – KMA 200

Quality ControlQuality Control• Plant Produced KMA-200

• Consistency and Performance

QA/QC OverviewQA/QC Overview

• Testing QA/QC considerations• Structural layer coefficients• Typical sections

QA/QC FieldworkQA/QC Fieldwork

• Verification of application rates• Sample treated materials• Cast briquettes at varying densities using

Marshall hammer – 3 briquettes at 50 blows per side– 3 briquettes at 75 blows per side– 3 briquettes at 112 blows per side

• Measure briquettes for wet density• Complete density testing of reclaimed

pavement using heavy-duty Marshall density, i.e. 75 blows per side

QA/QC Fieldwork cont.QA/QC Fieldwork cont.

• Moisture content testing– Completed at plant location – Completed during placement

• Verification of placement depths

QA/QC Follow-up TestingQA/QC Follow-up Testing

• Briquettes are cured using same methods as completed during the mix design

• Strength testing completed for– Dry ITS– Soaked ITS– Soaked stability and flow

QA/QC Follow-up TestingQA/QC Follow-up TestingDry ITS vs Density

y = 12.543x - 1276.2

100

200

300

400

500

600

700

800

125.0

126.0

127.0

128.0

129.0

130.0

131.0

132.0

133.0

134.0

135.0

136.0

137.0

138.0

Density (pcf)D

ry I

TS

(k

Pa

)

Soaked ITS vs Density

y = 7.9208x - 670.26

100

200

300

400

500

600

700

800

125.0

126.0

127.0

128.0

129.0

130.0

131.0

132.0

133.0

134.0

135.0

136.0

137.0

138.0

Density (pcf)

So

ak

ed

IT

S (

kP

a)

• Develop polynomial trend lines using strength and field wet density values

• Estimate in-place strength of SBC at each compaction test location– Dry ITS – Soaked ITS – Stability

QA/QC Structural Layer QA/QC Structural Layer CoefficientsCoefficients

Structural Layer Coefficient vs. ITS

0.150.170.190.210.230.250.270.290.310.330.35

200 300 400 500

kPa

pe

r in

ch

Futher Research Required

Questions / DiscussionQuestions / Discussion

?