Q1: A condition survey on a section unit has three sample units of a flexible pavement produced the following distress summary. The area of the flexible pavement sample unit was 1800 m2. Calculate the average pavement condition for the section unit in PCI using PAVER system. Sample unit 1 Extent Distress Type Rutting Pothole Severity 2 m Low 9 numbers High Sample unit 2 Extent Distress Type Long and trans Cracking Rutting Severity 25 m 50 m Sample unit 3 Low Low Distress Type Alligator cracking Extent Severity 72 m 1 number Medium Potholes High

Q1: A condition survey on a section unit has three sample units of a flexible pavement produced the following distress summary. The area of the flexible pavement sample unit was 1800 m2. Calculate the average pavement condition for the section unit in PCI using PAVER system. Sample unit 1 Extent Distress Type Rutting Pothole Severity 2 m Low 9 numbers High Sample unit 2 Extent Distress Type Long and trans Cracking Rutting Severity 25 m 50 m Sample unit 3 Low Low Distress Type Alligator cracking Extent Severity 72 m 1 number Medium Potholes High

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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2 a. The scales reading the weight of each truck were reading 10% low. Calculate the ESAL for the following truck, assuming flexible pavement for both the axle/axle group weight and the weight increased by 10% 12,000 lbs 40,000 lb shoporst 20,000 b. Calculate the ESAL for the above truck, assuming rigid pavement. 20,000
A conventional flexible pavement has been periodically checked for accumulated permanent deformations in various layers using a multi-depth deflectometer (MDD). The following subgrade soil rut data were obtained: Subgrade Soil Rut (in.) Number of 18-kip Axle Loads 0.1 10,000 0.225 100,000 Estimate the rut depth contributed by the subgrade soil for 1-million 18-kip axle loads.
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
Question One: Explain based on engineering feature briefly for the followings: a)What are the tests that are carricd out on the subgrade? b)Explain the types of nggregate specific gravities used in association with pavements? Which one has more value? )Write down the importance of: Proctor Compaction Test and CBR Test. d)What's the reason of applying surcharge weight above the sample of the soil in CBR test before performs the test? e)What does "degree of compaction" mean?
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1.4 Using suitable example/s differentiate between structural testing and functional testing.
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A pavement designer has arrived at a design traffic of 100 million standard axles for a newly developing national highway as per IRC:37 guidelines using the following data: design life = 15 years, commercial vehicle count before pavement construction = 4500 vehicles/day, annual traffic growth rate = 8%. The vehicle damage factor used in the calculation was A B с 1.53 2.24 3.66 D 4.14
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?
Select one for each of the following: 1. Tire pressure affects the: a) pavement thickness b) quality of surface course 2. Tie bars in rigid pavements are at: a) expansion joints 3. The fundamental factor in selection of pavement type is a) climatic condition b) type and intensity of traffic c) subgrade and drainage condition d) cost 4. Present Serviceability Index (PSI) depends on a) slope variance 5. Using subbase course in rigid pavement is for: a) resist unlimited loading b) more economical c) drainage purpose d) no reinforcement used c) number of layers d) pavement type b) contraction joints c) warping joints d) longitudinal joints b) rutting c) cracking d) all of them