: Fill in the following blanks: 1. . is a collapse of pavement structure or a breakdown of one or more pavement components. 2. For soils that have particle sizes between .... 3. The thickness design of flexible pavement is influenced by the 4. The scale Present Serviceability Index (PSI) ranges from ... considered as sand. 5. The traffic load is determined in terms of a single-axle load applied to the pavement on two sets of dual tires which is ... lb.

: Fill in the following blanks: 1. . is a collapse of pavement structure or a breakdown of one or more pavement components. 2. For soils that have particle sizes between .... 3. The thickness design of flexible pavement is influenced by the 4. The scale Present Serviceability Index (PSI) ranges from ... considered as sand. 5. The traffic load is determined in terms of a single-axle load applied to the pavement on two sets of dual tires which is ... lb.

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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Question It is required to design a collector road pavement in an urban area composed of 3 layers with different material and resilient modulus values as shown in Figure 1. Given, ESAL=1.0*106, drainage quality is good. Less than 25% of the time the pavement will be exposed to moisture levels approaching saturation. Determine the thickness of the pavement courses layers. Assume So=0.35 and APSI=2.0. HMA surface Untreated base course Sand gravel subbase E1-500000 psi D1 E2= 20000 psi D2 E3=15000 psi D3 MR=5500 psi
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
Overall standard deviation, S, Design serviceability loss, APSI 10 5.0 99.9 0.2 99 1.0 0.4 0.5 0.6 90 0.5 0.1 0.05 1.5 2.0 80 70 2.5 60 3.0 50 9 87 65 4 6.5 5.5 4.5 3.5 2 1 Eхample: 2.5 1.5 W18 = 5 x 106 Design structural number, SN R = 95% S, = 0.35 M = 5000 Ib/in² APSI = 1.9 Solution: SN = 5.0
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The overall standard deviation in the flexible pavement design equation accounts for the variation in the loading, materials and the construction practices. O True O False
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Q#1 What is the primary function of the pavement structure? Why do we use high quality materials as we go from bottom to top of the pavement structure? Discuss various tests used for the quality of bitumen used in flexible pavements. Discuss various tests used for the quality of aggregate used in flexible pavements.