Robert Kostick

Eshan Dave amp Jay Dailey University of Minnesota Duluth

Comparative Performance Study of Bonded Wear Course Systems

Applied to Bridge Decks

2

3

Benefits

4

1 Lightweight

5

2 High Friction

6

3 Deck Sealant

7

4 Fast Cure Time

8

Purpose of Research

Outline Construction Aggregate Quality Testing Bridge Site Visits Accident Data Analysis Conclusion

9

Construction

Surface Preparation

Joint Preparation

Epoxy Layer

Adding Aggregate

Aggregate Quality Testing

18

Aggregate Gradation

19

0

10

20

30

40

50

60

70

80

90

100

0375 4 8 16 50

Perc

ent P

assi

ng (

)

Sieve Size

Basalt Flint Taconite A Taconite B

SafeLane MnDOT Upper Limit MnDOT Lower Limit

Mass Loss Due to Freeze Thaw

20

00

05

10

15

20

25

30

Basalt Flint Taconite A Taconite B SafeLane

Perc

ent L

ost (

)

Aggregate Type

Bridge Site Visits

Interstate 94 in Moorhead Bridge 9066 amp 9067 PolyCarb System (Flint)

Highway 53 in Virginia Br 69006 PolyCarb System (Taconite)

Interstate 35 in Atkinson Br 9832 PolyCarb System (Basalt)

Interstate 1-94 in Barnesville Br 14809 amp 14810 SafeLane

TH 101 amp CSAH 36 in Otsego Br 27758 86013 amp 86019 NovaChip

Penn Ave in Minneapolis Br 27758 Transpo T-48

TH 243 in Osceola Br 6347 Transpo T-48

Field Testing

Permeability Test (Water sealant) Torque Bond Test (Bond to bridge deck) Sand Patch Test (Friction) Surface Friction (Friction)

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Permeability

Bridge Permeability (cmsec)

Wheel Path Non-Wheel Path

69006 0 10x10-6 9832 90x10-7 20X10-7 4190 NA NA 9036 22X10-7 19X10-7 6066 0 21X10-7 6067 18X10-7 NA

14810 38x10-6 NA 86013 98x10-5 55x10-6

Permeability Results

Torque Bond Strength

33

050

100150200250300350400450500

Req

uir

ed

To

rqu

e (

Nm

)

Non-Wheel Path Wheel Path

No

Dat

a N

o D

ata

No

Dat

a N

o D

ata

No

Dat

a N

o D

ata

Torque Test Results

Sand Patch

36

37

Mean Texture Depth Results

0

001

002

003

004

005

006

007

Br 69006(Taconite)

Br 3823(Basalt)

Br 4190(Basalt)

Br 9036(Basalt)

Br 9066(Flint)

Br 9067(Flint)

Br 14810(SafeLane)

Mea

n Te

xtur

e De

pth

(in)

Non-Wheel Path Wheel Path New Asphalt

Brush Concrete Worn Tined Concrete

0

001

002

003

004

005

006

007

Passing LaneNon-Wheel Path

Passing LaneWheel Path

Driving LaneNon-Wheel Path

Driving LaneWheel Path

Ave

rag

e M

ean

Textu

re D

ep

th (

in)

Position on Roadway

Br 14810 Passing vs Driving Lane

Source httpwwwdotstatemnusmnroaddatapdfsMnROAD20Friction20(KJ20Law)20FINALpdf

Surface Friction

KJ Law (Dynatest) Skid Trailer

Source httpwwwdotstatemnusresearchTS2011201112pdf

Bridge 14810 (Barnesville MN) Avg Friction Numbers

0

10

20

30

40

50

60

70

80

90

100

2007 (Pre) 2007 (Post) 2008 2009 2010 2011 2012

Fric

tion

Num

ber

Year Tested

Ribbed Tires Smooth Tires

Average Ribbed Tire Friction Number over Time

0

10

20

30

40

50

60

70

80

90

100

1 2 3 4 5 6

Aver

age

Fric

tion

Num

ber

Years in Service Turf Drag PCC 69006 9823

9066 9067 14809

14810 27758 27019

Analysis of Accident Data

Analysis of Accident Data Public Safety Database 2003-2013 Incomplete data in 2003 and 2013 for Metro bridges

293 Reported Accidents were analyzed Bridge 86019 No reported accidents (On Ramp) Bridge 27758 1 reported accident (Penn Ave)

45

Total Number of Accidents

46

73

90

25 22

14

44

19

2 4

0

10

20

30

40

50

60

70

80

90

100

9066 9067 9832 14809 14810 69006 27019 86013 6347

Tota

l Num

ber o

f Acc

iden

ts

Month

47

0

10

20

30

40

50

60

70To

tal N

umbe

r of A

ccid

ents

Month

Surface Conditions

48

37

39

9

7

3 5

Dry

Ice PackedSnow

Snow

Wet

Slush

Other

Overlay Cross-Section

49

Overlay Cross-Section

50

Overlay Cross-Section

51

Weather during Ice Packed Snow Surface Conditions

52

21

34

27

5

6 2

5

Clear

Cloudy

Snow

Sleet

Blowing Snow

Rain

Other

Number of Crashes per Million Vehicles

53

0

02

04

06

08

1

12

9066 9067 9832 14809 14810 69006 27019 86013 6347

Num

ber o

f Cra

shes

per

Mill

ion

Vehi

cles

Before Installation After Installation

Accidents Compared to Total Accidents in MN

54

000

001

002

003

004

005

006

007

008

9066 9067 9832 S 9832 N 14809 14810 69005 69006 27019 27020 86013 6347

Aver

age

Perc

enta

ge o

f Ann

ual C

rash

es in

Min

neso

ta

Before After

Summary Site Visits All currently performing satisfactorily Negligible permeability Sufficient bond strength between bridge deck and

system Mean texture depth steadily decreases after

installation Friction numbers have decreased due to these

distresses

Summary Accident Analysis Most conditions occurred with dry or ice packed snow

surface conditions when the high friction has very little effect

Over half of the ice packed snow conditions occurred with clear or cloudy weather

There is a marginal reduction in accidents Accident rates are similar to bridge decks without an

epoxy overlay system

56

Special Thanks To MnDOT Funding for this project Coordination for site visits Setting up traffic control Providing data for analysis

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Thank You For Your Time Questions

58