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Typical Values of Young's Elastic Modulus and Poisson's Ratio for Pavement Materials Young's Elastic Modulus Poisson's R...

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Typical Values of Young’s Elastic Modulus and Poisson’s Ratio for Pavement Materials Young’s Elastic Modulus (E or Mr), psi

Poisson’s Ratio (μ or ν)

2,000,000 – 5,000,000 300,000 – 500,000 20,000 – 50,000

0.25 – 0.30 0.30 – 0.35 0.35 – 0.40

3,000,000 – 5,000,000

0.15

Similar to granular base course materials

Similar to granular base course materials

20,000 – 80,000

0.35

20,000 – 80,000

0.35

10,000 – 60,000 3,000 – 15,000

0.35 0.40

500,000 – 2,000,000 40,000 – 200,000

0.20 0.30

Cement stabilized subgrade

50,000 – 500,000

0.20

Lime stabilized subgrade

20,000 – 150,000

0.20

Gravelly and/or sandy soil subgrade (drained)

10,000 – 60,000

0.40

Silty soil subgrade (drained)

5,000 – 20,000

0.42

Clayey soil subgrade (drained)

3,000 – 12,000

0.42

1,500 – 6,000

0.45 – 0.50

250,000 – 1,000,000

0.20

Material Asphalt concrete (uncracked)

32 F 70 F 140 F Portland cement concrete (uncracked) Extensively cracked surfaces Crushed stone base (clean, well-drained) Crushed gravel base (clean, well-drained) Uncrushed gravel base Clean, well-drained Clean, poorly-drained Cement stabilized base Uncracked Badly cracked

Dirty, wet, and/or poorly-drained materials Intact Bedrock Note: Values greater than 500,000 have negligible influence on surface deflections.

Note: Exceptions to the typical values given above often occur. High fines contents and/or high moisture contents tend to reduce Young’s modulus and increase Poisson’s ratio. Unusually low fines contents and/or low moisture contents have the opposite effect. Poisson’s ratio for a completely saturated material will be close to 0.50. Well-cured, asphalt emulsion stabilized gravel, and reclaimed asphalt pavements, will have moduli slightly less than asphalt concrete.

Typical Values of Young’s Elastic Modulus and Poisson’s Ratio for Pavement Materials Young’s Elastic Modulus (E or Mr), MPa

Poisson’s Ratio (μ or ν)

13500 – 35000 2000 – 3500 150 – 350

0,25 – 0,30 0,30 – 0,35 0,35 – 0,40

20000 – 35000

0,15

Similar to granular base course materials

Similar to granular base course materials

150 – 600

0,35

150 – 600

0,35

70 – 400 20 – 100

0,35 0,40

3500 – 13500 300 – 1400

0,20 0,30

Cement stabilized subgrade

350 – 3500

0,20

Lime stabilized subgrade

150 – 1000

0,20

Gravelly and/or sandy soil subgrade (drained)

70 – 400

0,40

Silty soil subgrade (drained)

35 – 150

0,42

Clayey soil subgrade (drained)

20 – 80

0,42

10 – 40

0,45 – 0,50

2000 – 7000

0,20

Material Asphalt concrete (uncracked)

0C 20 C 60 C

Portland cement concrete (uncracked) Extensively cracked surfaces Crushed stone base (clean, well-drained) Crushed gravel base (clean, well-drained) Uncrushed gravel base Clean, well-drained Clean, poorly-drained Cement stabilized base Uncracked Badly cracked

Dirty, wet, and/or poorly-drained materials Intact Bedrock Note: Values greater than 3500 have negligible influence on surface deflections.

Note: Exceptions to the typical values given above often occur. High fines contents and/or high moisture contents tend to reduce Young’s modulus and increase Poisson’s ratio. Unusually low fines contents and/or low moisture contents have the opposite effect. Poisson’s ratio for a completely saturated material will be close to 0.50. Well-cured, asphalt emulsion stabilized gravel, and reclaimed asphalt pavements, will have moduli slightly less than asphalt concrete.

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