Materials for Civil and Construction Engineers (4th Edition)
4th Edition
ISBN: 9780134320533
Author: Michael S. Mamlouk, John P. Zaniewski
Publisher: PEARSON
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Chapter 9, Problem 9.13QP
To determine
The proper PG grade for both 50% and 98% reliabilities.
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For the following temperature conditions, calculate the proper PG grade for both 50% and 98% reliabilities (show your calculation).Seven-day maximum pavement temperature of 48°C with a standarddeviation of 2.5°C. Minimum pavement temperature of -21°C with a standard deviation of 3°C.
What standard PG asphalt binder grade should be selected under the following conditions:a. The seven-day maximum pavement temperature has a mean of 62°C and a minimum pavement temperature of -15°C. (table9.2)
b. According to part a, what is your recommendation for 20 million ESALs and 50 km/h speed? (table ESALs)
c. For 50 million ESALs and 80 km/h speed. (table ESALs)
Problem 1: Make a diagram showing the comparison between Flexible and Rigid Pavement. Categorize the comparison based on the type and number of layers, materials used, design input data, suitability, durability etc.
Note: For reference use AASHTO
Chapter 9 Solutions
Materials for Civil and Construction Engineers (4th Edition)
Ch. 9 - Prob. 9.1QPCh. 9 - Prob. 9.2QPCh. 9 - Prob. 9.3QPCh. 9 - Prob. 9.4QPCh. 9 - Prob. 9.5QPCh. 9 - Prob. 9.6QPCh. 9 - Prob. 9.7QPCh. 9 - What are the engineering applications of each of...Ch. 9 - Prob. 9.9QPCh. 9 - Prob. 9.10QP
Ch. 9 - Prob. 9.11QPCh. 9 - Prob. 9.12QPCh. 9 - Prob. 9.13QPCh. 9 - Prob. 9.14QPCh. 9 - Prob. 9.15QPCh. 9 - Prob. 9.16QPCh. 9 - Prob. 9.17QPCh. 9 - Prob. 9.18QPCh. 9 - What are the objectives of the asphalt concrete...Ch. 9 - Prob. 9.20QPCh. 9 - Prob. 9.21QPCh. 9 - Prob. 9.22QPCh. 9 - Prob. 9.23QPCh. 9 - Prob. 9.24QPCh. 9 - Prob. 9.25QPCh. 9 - An asphalt concrete mixture includes 94% aggregate...Ch. 9 - Prob. 9.27QPCh. 9 - Prob. 9.28QPCh. 9 - Prob. 9.29QPCh. 9 - Prob. 9.30QPCh. 9 - Based on the data shown in Table P9.31, select the...Ch. 9 - Based on the data in Table P9.32, determine the...Ch. 9 - Given the data in Table P9.33, select the blend...Ch. 9 - The Marshall method of mix design has been widely...Ch. 9 - Prob. 9.35QPCh. 9 - Prob. 9.36QPCh. 9 - Prob. 9.37QPCh. 9 - Prob. 9.38QPCh. 9 - Prob. 9.39QPCh. 9 - Prob. 9.40QPCh. 9 - Prob. 9.41QPCh. 9 - Prob. 9.42QPCh. 9 - Prob. 9.43QPCh. 9 - What is the purpose of adding fly ash to asphalt...Ch. 9 - Prob. 9.45QPCh. 9 - Prob. 9.47QPCh. 9 - Prob. 9.48QP
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- Discuss the following terms briefly: I. Emulsion breaking and Cutback curing, III. Flexible pavement and Rigid pavements, VII. Breast wall and retaining wall.arrow_forwardProblem No. 1A flexible pavement for an urban interstate highway is to be designed using the AASHTO method to carry a design ESAL of 3 x 106. It is estimated that it takes about a week for water to be drained from within the pavement and the pavement structure will be exposed to moisture levels approaching saturation for 30% of the time. The following additional information is available: Elastic modulus of asphalt concrete = 450,000 psiResilient modulus of base material = 35,000 psiResilient modulus of subbase material = 15,000 psiCBR of subgrade material = 8arrow_forwardi need an answer immediately. thank you Design the thickness of a pavement to carry a wheel load of 52kN based on the following conditions and type of pavement. A pavement with maximum CBR value of 8% for the subgrade soil supporting this load. The tire pressure is equal to 4kg/cm².Use U.S. Corps of Engineers Formula.arrow_forward
- Choose standard PG asphalt binder grade for the following condition: (show your calculation) The seven-day maximum pavement temperature has a mean of 45°C and standard deviation of 4°C The minimum pavement temperature has a mean of -26C and a standard deviation of 2.0°C. a) At reliability of 84% b) At reliability of 98%.arrow_forwardAn 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 − 0.531 TRAN, 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 = 108 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 = 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…arrow_forwardComparing Rigid and Flexible Airport Pavement .arrow_forward
- Problem No. 1A flexible pavement for an urban interstate highway is to be designed using the AASHTOmethod to carry a design ESAL of 3 x 106. It is estimated that it takes about a week for water tobe drained from within the pavement and the pavement structure will be exposed to moisturelevels approaching saturation for 30% of the time. The following additional information is available: Elastic modulus of asphalt concrete = 450,000 psiResilient modulus of base material = 35,000 psiResilient modulus of subbase material = 15,000 psiCBR of subgrade material = 8(a) Consider designing the same pavement with only asphalt concrete and base layer (excluding subbase layer). Use the information provided in Problem 1. (b) Compare strengths and weaknesses of each design.arrow_forwardan interstate highway pavement composed of a hma surface course, a cement treated base course, and a sand–gravel subbase is to be designed for an esal of 1.2*10^6.the quality of drainage is considered fair because water can be removed from the subbase within a week. however, there is a large amount of precipitation, so more than 25% of the time the pavement will be exposed to moisture levels approaching saturation. the material properties are as follows: effective roadbed soil resilient modulus = 5,500 psi, resilient modulus of subbase = 15,000 psi, unconfined compressive strength of cement-treated base at 7 days = 500 psi, and resilient modulus of hma = 4.3*10^5 psi. assuming a minimum thickness for hma, determine the thicknesses of the surface, base,and subbase courses required. Assuming a minimum thickness for HMA, determine the thicknesses of the surface, base,and subbase courses required.arrow_forwardQ, Discuss the following terms briefly: a, Emulsion breaking and Cutback curing, b, Water bound and aggregate base, c, Flexible pavement and Rigid pavements,arrow_forward
- Give me right solution... Urgent please A 5 tonne wheel load is applied on a pavement and generates a surface deflection of 0.15 mm. A. If the pavement is 125 mm thick, what is the vertical stress at the top of the subgrade? B. If the equivalent radius of tyre contact is 100 mm and Poisson’s ratio is 0.3, what is the pavement’s modulus of elasticityarrow_forwardA 7-day average high temperature of the pavement at a ¾” depth is expected to be 138 degrees F (std. dev. 3.5 deg. F), and the average low temperature in the pavement is expected to reach 10 degrees F (std. dev. 2.5 deg. F). The pavement will be used to repave the intersection of a busy local road. Address the following: a) Determine the performance grade of the asphalt that should be used for this pavement with 98% reliability. b) Discuss the general considerations for ductility of the binder for the conditions stated. c) If a penetration test yields a penetration of 8.5 mm into the asphalt, list its penetration grade, viscosity grade, and expected flashpoint. d) Discuss the suitability of the addition of lime to the pavement mix.arrow_forward11. The range of typical terminal serviceability indices (pt) used in design of highway pavements is:a. -1.0 and 0.0b. 0.0 and 1.0c. 2.0 and 2.5d. 10.0 and 20.0 14. In the AASHTO 1986 and 1993 design guide, the following modification(s) was(were) incorporated in the design procedure:a. Reliabilityb. Changes in modulus of elasticity subgrade materials due to climatec. Drainage layersd. All of the above15. Interstate highways should be designed for a lower level of reliability as compared to secondary roads.a. Trueb. False 17. In the Asphalt Institute flexible pavement design approach, Where are the critical stress and strain locations checked?a. Top of the asphalt concrete layerb. Middle of the asphalt concrete layerc. Bottom of the asphalt concrete layerd. Bottom of the asphalt concrete layer and top of the subgrade 19. In the Portland Cement Association (PCA) design of rigid highway pavements, the design approach is based on:a. Fatigue Damageb. Erosion Damagec. Both Fatigue Damage and…arrow_forward
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