A flexible pavement has a 210 mm hot-mix asphalt “HMA" wearing surface, a 300 mm base (MG-20), and a 500 mm subbase (MG-112). The pavement was designed with 95% reliability, an overall standard deviation So of 0.45, and a APSI of 1.75 (a TSI of 2.5). The drainage coefficient is 0.8 for the base and subbase. The materials properties are as follows: - - - Resilient modulus of HMA = 2 894 MPa (or 420 000 psi); Resilient modulus of base (MG-20) = 169 MPa (or 24 500 psi); Resilient modulus of subbase (MG-112) = 74 MPa (or 10 700 psi); Effective roadbed soil resilient modulus = 36 MPa (or 5 200 psi).
A flexible pavement has a 210 mm hot-mix asphalt “HMA" wearing surface, a 300 mm base (MG-20), and a 500 mm subbase (MG-112). The pavement was designed with 95% reliability, an overall standard deviation So of 0.45, and a APSI of 1.75 (a TSI of 2.5). The drainage coefficient is 0.8 for the base and subbase. The materials properties are as follows: - - - Resilient modulus of HMA = 2 894 MPa (or 420 000 psi); Resilient modulus of base (MG-20) = 169 MPa (or 24 500 psi); Resilient modulus of subbase (MG-112) = 74 MPa (or 10 700 psi); Effective roadbed soil resilient modulus = 36 MPa (or 5 200 psi).
Traffic and Highway Engineering
5th Edition
ISBN:9781305156241
Author:Garber, Nicholas J.
Publisher:Garber, Nicholas J.
Chapter19: Design Of Flexible Highway Pavements
Section: Chapter Questions
Problem 11P
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Transcribed Image Text:A flexible pavement has a 210 mm hot-mix asphalt “HMA” wearing surface, a 300 mm base
(MG-20), and a 500 mm subbase (MG-112).
The pavement was designed with 95% reliability, an overall standard deviation So of 0.45, and a
APSI of 1.75 (a TSI of 2.5). The drainage coefficient is 0.8 for the base and subbase.
The materials properties are as follows:
-
=
Resilient modulus of HMA 2 894 MPa (or 420 000 psi);
Resilient modulus of base (MG-20) = 169 MPa (or 24 500 psi);
Resilient modulus of subbase (MG-112) = 74 MPa (or 10 700 psi);
Effective roadbed soil resilient modulus = 36 MPa (or 5 200 psi).
How many 18-kip (80-KN) single-axle loads can be carried before the pavement reaches its TSI
(terminal serviceability index).
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