slide1 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Performance of Stone Matrix Asphalt Pavements in Maryland PowerPoint Presentation
Download Presentation
Performance of Stone Matrix Asphalt Pavements in Maryland

Loading in 2 Seconds...

play fullscreen
1 / 25

Performance of Stone Matrix Asphalt Pavements in Maryland - PowerPoint PPT Presentation


  • 122 Views
  • Uploaded on

Performance of Stone Matrix Asphalt Pavements in Maryland. L. Michael G. Burke C. Schwartz AAPT 2003 Lexington, KY. Maryland’s First SMA 1992 First Superpave 1995. 2001. 2002. 1999. 2000. 1996. 1997. 1998. Since 1996 Maryland has been designing SMA with SGC. 76-22. 70-22.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Performance of Stone Matrix Asphalt Pavements in Maryland' - stephen-best


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

Performance of

Stone Matrix Asphalt

Pavements

in Maryland

L. Michael

G. Burke

C. Schwartz

AAPT 2003

Lexington, KY

slide2

Maryland’s First SMA 1992

First Superpave 1995

slide3

2001

2002

1999

2000

1996

1997

1998

Since 1996 Maryland has been designing SMA with SGC

slide4

76-22

70-22

64-28

Since 1997 Maryland has been using PG Binders...

slide5

Ndesign

100

VTM

4.0

VMA

18.0

External

1.25

Internal

1.16

slide6

19.0

12.5

9.5

4.75

2.36

1.18

0.6

0.3

0.15

0.075

GRADATION SPECIFICATION

19.0 mm

100

82-88

-60

20-28

14-20

9-11

12.5 mm

100

90-99

70-85

30-50

20-33

8-11

9.5 mm

100

100

70-90

30-50

20-30

8-13

slide7

COARSE AGGREGATE

Gap-Graded Mixes

Test

Property

LA Abrasion Loss,

% Max.

Flat & Elongated

Particles, %

Retained on the

#4 Sieve Max.

3:1

5:1

PV

Test

Method

T96

D4791

---

---

MSMT 411

Specification

Limits

30

---

20

5

8.5(d)

slide8

Hot Mix

Asphalt

Gap-Graded

Plant Control

VMA

18.0 Min.

17.0 Min.

VTM

4.0

±1.2

Ndes

100

AC

6.5 Min.

±0.4

Binder

70-22

Draindown

% Max.

Stabilizer By

Weight of

Total Mix %

Specification

0.3

0.2 - 0.4

Plant Tolerance

0.3 Max.

±0.1

The Gap-Graded Specimen shall

conform to the following

slide9

Rut Resistant

Durable

Skid Resistant

Reduced Spray

Reduced Hydroplaning

Reduced Sound

CHARACTERISTICS

SuperpaveSMA

slide10

DECISION POINTS

FOR USING SMA

  • 2000 ESAL’s per day
  • 55 mph
slide13

12.5 mm

19 mm

slide14

12.5 mm

19 mm

slide15

12.5 mm

19 mm

slide16

12.5 mm

19 mm

correlations

12.5 mm

19 mm

CORRELATIONS
  • SMALL RANGE OF PERFORMANCE
  • SMALL RANGE OF MIX PROPERTIES
summary
SUMMARY
  • Performance and material property data for 85 SMA projects
    • 1300 lane miles
    • Up to 10 years service life
    • Primarily 19 and 12.5 mm SMA mixes
  • Excellent performance:
    • Rutting: 0.04 inches/year (avg)
    • Roughness (IRI): 3.2 in/mile-year (avg)
    • Friction (FN): 1.3/year (avg)
summary1
SUMMARY
  • Inconclusive correlations between performance and mix properties
    • Too little variation/deterioration of performance
    • Too little variation in mix properties

Many of the Maryland SMA sections

look better today than when first

opened to traffic!

slide24

SMA looks

good...

…Let’s use

it!