As a materials engineer working for ahighway department, what standard PGasphalt binder grade would you specify foreach of the conditions show in the table.Seven-DayМaximumMinimum PavementRecommended PG GradePavementTemperature, °CTemperature, "CCase50%98%Mean, °CStd. Dev., "CMean, "CStd. Dev., °CReliabilityReliability391-323.5541.5-172692.51.

The condition that high/low-temperature grade of pavement should satisfy: High temperature Grade…

As a materials engineer working for a highway department, what standard PG asphalt binder grade would you specify for each of the conditions show in the table. Seven-Day Maximum Minimum Pavement Recommended PG Grade Pavement Temperature, C Temperature, C Case 50% 98% Mean, "C Std. Dev., "C Мean, "C Std. Dev., "C Reliability Reliability 1 39 1 -32 3.5 2 54 1.5 -17 2 69 2. 2.5

As a materials engineer working for a highway department, what standard PG asphalt binder grade would you specify for each of the conditions show in the table. Seven-Day Maximum Minimum Pavement Recommended PG Grade Pavement Temperature, C Temperature, C Case 50% 98% Mean, "C Std. Dev., "C Мean, "C Std. Dev., "C Reliability Reliability 1 39 1 -32 3.5 2 54 1.5 -17 2 69 2. 2.5

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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Concept explainers

Soil engineering for highway design

Soil engineering is a part of geotechnical engineering that deals with the characteristics of soil. It also helps to understand the behavior of the soil in different conditions. The basic concepts of soil are studied to check the strength, compressibility, and porosity of the soil. This makes soil engineering an important topic for civil engineering.

Question

As a materials engineer working for a
highway department, what standard PG
asphalt binder grade would you specify for
each of the conditions show in the table.
Seven-Day
Мaximum
Minimum Pavement
Recommended PG Grade
Pavement
Temperature, °C
Temperature, "C
Case
50%
98%
Mean, °C
Std. Dev., "C
Mean, "C
Std. Dev., °C
Reliability
Reliability
39
1
-32
3.5
54
1.5
-17
2
69
2.5
1.

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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).
I need correct solution
The design equations for flexible pavements were determined as a result of laboratory experiments. True False
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An agency uses the following formula to determine pavement condition rating, PCR = 99.3 5.51 (5.0-ROUGH) 1.59 LNALL 0.221 AVGOUT 0.0306 LONG where we have the following. ROUGH = roughness measured by present serviceability rating (PSR), scale of 0 to 5 LNALL = natural logarithm of alligator cracking, ft per mile AVGOUT = outer wheel path rutting (all locations averaged), 0.01 inch LONG = longitudinal cracking, ft per mile TRAN = transverse cracking, number of cracks per mile And, present serviceability rating is determined as the following. PSR = 5e-0.0051118 IRI-0.0016027 A pavement section has the following distress data. IRI = 106 in./mi Alligator cracking 110 ft/mi Average rutting = 0.20 in. Longitudinal cracks = 130 ft/mi Transverse cracks = 12/mi Determine the current PCR for this section. PCR = 0.531 TRAN, Now, assume a new roughness measurement is expected soon. When PCR falls below 60, the section will be scheduled for rehabilitation. Determine the new IRI value (in in./mi)…
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Please answer pricsely
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
Please show all of your work and give the correct answer.
B. A rigid pavement with a 10-inch slab thickness, 90 percent reliability, E. = 4 million lb/in², 600 lb/in² modulus of rupture, 150 lb/in³ modulus of subgrade reaction, a 2.8 load transfer coefficient, initial PSI of 4.8, final PSI of 2.5, overall standard deviation of 0.35, and a drainage coefficient of 0.8 is designed. The pavement's design life is 20 years. The three-lane road is built for vehicles with one 20,000-pound single axle, one 26,000-pound tandem axle, and one 34,000-pound triple axle. Calculate the projected daily truck traffic on the three lanes.