Pavement Design and Analysis - Design a HMA pavement structure for a 6-lane divided urban highway using the AASHTO methodto accommodate the traffic loads and conditions as follows. Give two alternative layer thicknesscombinations. Design a HMA pavement structure for a 6-lane divided urban highway using the AASHTO methodto accommodate the traffic loads and conditions as follows. Give two alternative layer thicknesscombinations.AADT (summer of 2017) = 10,000 vpdTruck percent of 20% class-9 semi-trailersTraffic growth rate of 2.5% annuallyDirectional split = 55/45o Design period = 20 yearsAxle load distribution (percentages) as per table belowLoad Bin (kips)Single axles onsingle tires40Tandem axles8-1010-126034-365536-3845o Desired Reliability 95%Soil is silty clay with a CBR ofThree materials to be used with the following moduli (lab results):НМА:E = 400,000 psi, Gmb of 2.37, 60JD/TonBaseCoarse: E = 30,000 psi, 10 JD/m³E = 15,000 psi, 8 JD/m³Base and SubBase to be saturated 5% of the time with a good drainage system.SubBase:ооо о о

First you need to calculate the ESAL's which is on the road during the plan life. For this put the…

Answered: Design a HMA pavement structure for a…

Design a HMA pavement structure for a 6-lane divided u o accommodate the traffic loads and conditions as foll ombinations. LO0 00

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Q: A rigid pavement is being designed with the same parameters as used in Problem 4.5. The modulus of…

Q: 12.7 Figure P12.7 shows a concrete pavement with the thicknesses and elastic moduli as indi- cated.…

Q: 23. In the PCA design procedure of rigid highway pavements, the erosion damage analysis was devised…

A: We have to find out the correct option.

Q: Can you give me a problem example for flexible pavements with solution

A: Given , We have to provide a Problem related to design of Flexible pavement.

Q: The AASHTO present serviceability index (PSI) correlates the PSR to actual pavement performance in…

A: The original AASHO Road Test PSR serves as the foundation for the current serviceability index…

Q: Differentiate function of bound and unbound layer of flexible pavement.

A: Flexible pavement transmit load from wheel to the lower layer by grain to grain transfer which take…

Q: Using the AASHTO rigid design procedure, design a pavement for a provincial road with an expected…

A: Given;ESAL = 20106 ESALS/yrElastic modulus of concrete (Ec) = 5106 PsiModulus of rupture of concrete…

Q: Traffic loading in the flexible pavement design equation is equal to the number of vehicles that use…

A: Flexible pavement consists of a surface layer of bitumen-bound aggregate (asphalt concrete), several…

Q: One of the unbound pavement layer road base materials is “Dry-bound Macadam”. When is this material…

A: Traditionally, a covering of stone that is approximately one size and has spaces covered with such a…

Q: - Design a three layer flexible pavement system using the CBR method, knowing that the present AADT…

A: The California Bearing Ratio test is a penetration test used to evaluate the subgrade strength of…

Q: 50 KPa is equivalent to: OA 5x 10°6 N/m^2 ) B) 5 x 10^5 N/m^2 O95x 10°3 N/m^2 O D) 5x 10^4 N/m^2…

A: Kindly follow the below time for answers

Concept explainers

Design of pavements

Pavement is a structure that is made up of different layers such as sub-base course layer, base course layer, binder course, and a surface course formed with different materials such as gravel, above the subgrade soil constructed to act as a path or carriageway enabling the movement of vehicles. The surface of the pavement should possess characteristics such as adequate friction, light reflection, and drainage. The pavements are classified based on structural design into rigid pavements, flexible pavements, composite pavements, and unpaved pavements. The process of determining a suitable pavement type, its constituent layers, and its thickness is called pavement design.

Question

Pavement 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.

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.
AADT (summer of 2017) = 10,000 vpd
Truck percent of 20% class-9 semi-trailers
Traffic growth rate of 2.5% annually
Directional split = 55/45
o Design period = 20 years
Axle load distribution (percentages) as per table below
Load Bin (kips)
Single axles on
single tires
40
Tandem axles
8-10
10-12
60
34-36
55
36-38
45
o Desired Reliability 95%
Soil is silty clay with a CBR of
Three materials to be used with the following moduli (lab results):
НМА:
E = 400,000 psi, Gmb of 2.37, 60JD/Ton
BaseCoarse: E = 30,000 psi, 10 JD/m³
E = 15,000 psi, 8 JD/m³
Base and SubBase to be saturated 5% of the time with a good drainage system.
SubBase:
ооо о о

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Step 5

Trending now

This is a popular solution!

Step by step

Solved in 5 steps with 3 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.

Similar questions

Given: Subgrade CBR = 15 70,000 lb loads for a taxiway CBR materials available: 20, 40, 80 Design the pavement with attention paid to optimizing costs and stability
What does PG76-28 mean in pavement construction?
need it correctly
12. Refer to Figure II-1 attached. A flexible pavement is to be evaluated according to the AASHTO 1972 design guide. The existing pavement has a weighted structural number=3.4, a regional factor=2.0, and a soil support value=4.5. What would be the approximated number of daily equivalent 18-kip axles to be allowed on this road for a 20-year analysis period?a. 10b. 33c. 100d. 1490
A rigid pavement is on a highway with two lanesin one direction, and the pavement is conservativelydesigned. The pavement has an 11-inch slab with amodulus of elasticity of 5,000,000 lb/in2 and a concretemodulus of rupture of 700 lb/in2, and it is on a soil witha CBR of 25. The design drainage coefficient is 1.0, theoverall standard deviation is 0.3, and the load transfercoefficient is 3.0. The pavement was designed to last 20years (initial PSI of 4.7 and a final PSI of 2.5) with 95%reliability carrying trucks with one 18-kip single axleand one 28-kip tandem axle. However, after thepavement was designed, one more lane was added in thedesign direction (conservative design still used), and theweight limits on the trucks were increased to a 20-kipsingle and a 34-kip tandem axle (the slab thickness wasunchanged from the original two-lane design withlighter trucks). If El Niño has caused the drainagecoefficient to drop to 0.8, how long will the pavementlast with the new loading and the…
What are the common distresses of a flexible pavement and a rigid pavement?
1. During the AASHO road test, ONLY flexible pavements were constructed and tested.a. Trueb. False2. The AASHO present serviceability rating (PSR) was considered an objective quantity used to establish the performance of highway pavement in terms of applied traffic.a. Trueb. False3. The AASHTO present serviceability index (PSI) correlates the PSR to actual pavement performance in terms of applied traffic, and select distresses.a. Trueb. False4. There is only one AASHTO PSI equation that applies to both flexible and rigid pavements.a. Trueb. False5. The AASHTO PSI scale ranges from:a. 0-5b. 0-10c. 0-100d. None of the above
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?
Determine 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…
26. Refer to Figure 8 Design 1A attached. For the design of a 4-lane interstate highway, the damage analysis shown in the figure was performed for a 9.5-inch thick slab according to the PCA design approach. This analysis indicates that the 9.5-inch thick slab: a. Only satisfies the fatigue damage condition b. Only satisfies the erosion damage condition c. Satisfies both fatigue damage and erosion damage conditions. d. None of the above the
Explain 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?
Define precisely the difference between pavement serviceability and performance. Using a sketch to indicate the concept of remaining service life of a pavement segment.