Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Chapter 19, Problem 17P
To determine
The main steps in the Mechanistic-Empirical Pavement design method as per MEPDG.
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1- What are the two main criteria of pavement failure in mechanistic-experimental design
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a) Discuss the strategy of pavement evaluation process in detail?
b) Write short notes on Dynamic Cone Penetrometer and Road Dynaflect?
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- Discuss the pros and cons of JPCP versus JRCP. What is meant by the mechanistic-empirical method of pavement design? Is it possible to develop a wholly mechanistic method of pavement design? Why?arrow_forwardExplain with sketches, the basis of Austroads mechanistic pavement thickness design method (i.e. what theories and assumptions are these methods based on). What is the major difference between the Austroads mechanistic-empirical (CIRCLY) design method and other mechanistic-empirical design methods?arrow_forward2- Describe six of the main differences between rigid and flexible pavements.arrow_forward
- Compare flexible and rigid pavement construction for a new highway.arrow_forwardPavement Design and Analysis - Design a HMA pavement structure for a 6-lane divided urban highway using the AASHTO method to accommodate the traffic loads and conditions as follows. Give two alternative layer thickness combinations.arrow_forward3. The AASHTO present serviceability index (PSI) correlates the PSR to actual pavement performance in terms of applied traffic, and select distresses.a. Trueb. Falsearrow_forward
- Comparing Rigid and Flexible Airport Pavement .arrow_forwardDetermine the base thickness of plain concrete pavement (PCP) without dowelled joints using the information and charts provided be • Desired project reliability - 85% Subgrade design CBR-6% • Design period -30 years • Design Traffic 5.0*10* HVAG(B) Note: The information obtained from each table or figure must be stated in the examination script to obtain relevant marks. Table 3.1: Minimum subbase requirements for rigid pavements Design traffic (HVAG) Subbase type 125 mm bound Up to 10⁰ Up to 5x10 150 mm bound or 125 mm LCS Up to 1x10 170 mm bound or 125 mm LCS 150 mm LCS Greater than 1x 10 1 Under CRCP, a heavily bound subbase with an asphalt surfacing is an acceptable alternative 75 Maximum permitted value CBR % Effective subgrade strength used in concrete base thickness determinations 60 50 40 35 30 25 20 15 12 10 Concrete Base 200 Thickness 190 (mm) 180 8. Pavement type 7. 6. 5. PCP Dowelled & CRCP 260 250 240 230 220 210 170 160 150 140 150mm LCS 125mm LCS 8 10 Design subgrade…arrow_forwardWrite the significance of each layer of flexible pavement in a single line. B) Describe the one most important factor of causing failure of highway subgradearrow_forward
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