arkansas interstates today - rmaces · 2020. 3. 5. · rubblization and asphalt overlay – the...

3/4/2020

1

Emanuel Banks, P.E.Deputy Director and Chief Engineer

Rubblization and Asphalt Overlay –The Arkansas DOT Experience

Arkansas Interstates Today

ARKANSAS DEPARTMENT OF TRANSPORTATION


• Jointed PCCP– Primarily mesh reinforced PCCP– 9” to 10” slab thickness– 6” granular base typical– Dowelled construction joints @ 45’– Sawn warping (control) joints @ 15’

• Undowelled

• Continuously Reinforced Concrete– 8” slab thickness– 6” to 8” soil cement or lime treated base

Typical Pavement Designs –Original Interstate Segments

1

2

3

3/4/2020

2


Typical Section of Original Interstate

6’‐0” 12’‐0” 12’‐0” 10’‐0”

0.015 ‘ / ’ 0.040.04

Arkansas Interstate Rehabilitation Programs (IRPs)


First IRP ‐ 1999• Bond Program• 359 miles of Interstate

Second IRP ‐ 2011• Bond Program• 502 miles of Interstate

First IRP – Why?


In 1994 Arkansas’ Interstate system ranked one of the five worst in the nation, using IRI “condition” data

The trucking industry ranked Arkansas Interstates some of the worst in the country

Typically only 10 – 15 miles of Arkansas Interstate pavements could be rehabilitated per year

12%

58%

30%

1994

IRI

Source: FHWA Highways Statistics – Table HM‐47

4

5

6

3/4/2020

3

First IRP - Breakdown

First IRP - Rubblization


Resonant Head Breaker

Multi‐Head Breaker



7

8

9

3/4/2020

4

First IRP – ACHM Overlay




First IRP – Edge Drains


10

11

12

3/4/2020

5

First IRP – Bridge Clearance


First IRP


First IRP


13

14

15

3/4/2020

6

First IRP - Results


1999 – Pre IRP

• 2703 Total Lane Miles

– PCCP

• 1999 Miles

– ACHM

• 704 Miles

• 74% PCCP

• 26% ACHM

2005 – Post IRP

• 2756 Total Lane Miles

– PCCP

• 991 Miles

– ACHM

• 1765 Miles

• 36% PCCP

• 64% ACHM

First IRP – Lesson Learned


75 75

60 59 5752

17.9 16.5

71.875.7

79.374.1

0

20

40

60

80

100

120

'97‐'00 2000 2001 2002 2003 2004

Weighted IRI (in/m

i)

Smoothness Over Bond Period

Interstate Rehabilitation Program

CompletedNumber of Projects: 48Miles: 311Amount (Millions): $1,066

CompletedNumber of Projects: 48Miles: 311Amount (Millions): $1,066

16

17

18

3/4/2020

7


Under ConstructionNumber of Projects: 4Miles: 34Amount (Millions): $248

Under ConstructionNumber of Projects: 4Miles: 34Amount (Millions): $248

Let To ContractNumber of Projects: 52Miles: 345Amount (Millions): $1,314

Let To ContractNumber of Projects: 52Miles: 345Amount (Millions): $1,314


ScheduledNumber of Projects: 27Miles: 160Amount (Millions): $220

ScheduledNumber of Projects: 27Miles: 160Amount (Millions): $220

Total ProgramNumber of Projects: 79Miles: 505Amount (Millions): $1,534

Total ProgramNumber of Projects: 79Miles: 505Amount (Millions): $1,534

Pavement Preservation – The Future


• Pavement Preservation is:

– “Keeping Good Roads Good”

• Pavement Preservation is not:

– Keeping a road from falling apart (band‐aid)

– Covering up a road that needs reconstruction

– Adding structure to a pavement

19

20

21

3/4/2020

8

2020 Pavement Preservation Projects

January – $31 Million

February – $69 Million

April – $58 Million

May – $40 Million

June – $57 Million





Source: PPRA

22

23

24

3/4/2020

9



Source: LA County Public Works Dept.

Questions?

25

26

arkansas interstates today - rmaces · 2020. 3. 5. · rubblization and asphalt overlay – the...

Documents