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Bituminous Stabilized Materials: Structural Design and Materials Classification. RPF November 2007 Fenella Long. Today’s Presentation. Demonstrate the software for Pavement design method Materials classification method Review process. Software. www.bitstab.roadrehab.com

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bituminous stabilized materials structural design and materials classification

Bituminous Stabilized Materials:Structural Design and Materials Classification

RPF

November 2007

Fenella Long

today s presentation
Today’s Presentation
  • Demonstrate the software for
    • Pavement design method
    • Materials classification method
  • Review process
software
Software
  • www.bitstab.roadrehab.com
  • Software runs on website
  • Background info
    • Descriptions
    • Download backup reports
materials classification
Materials Classification
  • Rational and consistent method of assigning materials to a class
  • Example
review process
Review Process
  • Need industry representatives to review – YES YOU
    • Structural design method
    • Approach to material classification
    • Material class limits
    • “Reasonableness” of results
example moderate region

6. Calculate Layer ELTS Values

ELTS = 450

BCF = 0.7

150 mm BSM2

MR = 2, EMax = 450

ELTS = 400

Thickness Adj = 0.4

200 mm C4

MR = 3, EMax = 400

ELTS = min(212,180)

ELTS = 180

180 mm G6

MR = 1.8, EMax = 180

118 MPa

118 MPa

150 mm G7

6. ELTS = min (Esupport * MR , Emax)

Example, Moderate Region

5. Assign modular ratio’s and max stiffness

1. Material Classes

CBR 7-15%

2. Determine subgrade stiffness (140 MPa)

3. Adjust for climate (126 MPa)

4. Adjust for cover (118 MPa)

7. Layer PN = thickness * ELTS

8. PN =  layer PN