Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 20, Problem 15P
To determine
A suitable thickness of the concrete pavement if the working stress of the concrete is
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
A six-lane concrete roadway is being designed for a metropolitan area. This roadway will be constructed on a subgrade
with an effective modulus of subgrade reactionk of 170 Ib/in^3. The ESAL used for the design period is 6.9* 10^6. Using
the AASHTO design method, determine a suitable thickness of the concrete pavement (to the nearest 12 inch). provided
that the working stress of the concrete to be used is 650 lb/in2 and the modulus of elasticity is 5 *10^6 Ib/in^2. Assume
the initial serviceability is 4.75 and the terminal serviceability is 2,5. Assume the overall standard deviation, So, as 0.35, the
load transfer coefficient J as 3.2. the drainage coefficient. Cd as 1.15. and R as 95%.
Answer:
A six-lane concrete roadway is being designed for a metropolitan area. This roadway will be constructed on a subgrade with an effective modulus of subgrade reaction k of 170 lb/in3. The ESAL used for the design period is 2.5 x 106. Using the AASHTO design method, determine a suitable thickness of the concrete pavement (to the nearest 1⁄2 inch), provided that the working stress of the concrete to be used is 650 lb/in2 (i.e. S’c) and the modulus of elasticity is 5 x 106 lb/in2. Assume the initial serviceability is 4.75 and the terminal serviceability is 2.5. Assume the overall standard deviation, So, as 0.35, the load transfer coefficient J as 3.2, the drainage coefficient, Cd as 1.15, ZR as -1.645 and R as 95%.
A six-lane concrete roadway is being designed for a metropolitan area. This roadway will be constructed on a subgrade with an effective modulus of subgrade reaction k of 170 lb/in3. The ESAL used for the design period is 2.5 ? 106. Using the AASHTO design method, determine a suitable thickness of the concrete pavement (to the nearest 1⁄2 inch), provided that the working stress of the concrete to be used is 650 lb/in2 and the modulus of elasticity is 5 ? 106 lb/in2. Assume the initial service- ability is 4.75 and the terminal serviceability is 2.5. Assume the overall standard devi- ation, So, as 0.35, the load transfer coefficient J as 3.2, the drainage coefficient, Cd as 1.15, and R as 95%.
Chapter 20 Solutions
Traffic and Highway Engineering
Ch. 20 - Portland cement concrete consists of what four...Ch. 20 - List and briefly describe the five main types of...Ch. 20 - What is the main requirement for the water used in...Ch. 20 - Prob. 4PCh. 20 - Prob. 5PCh. 20 - Prob. 6PCh. 20 - Prob. 7PCh. 20 - Prob. 8PCh. 20 - Prob. 9PCh. 20 - Prob. 10P
Ch. 20 - Prob. 11PCh. 20 - Prob. 12PCh. 20 - Repeat Problem 20-12, with the slab containing...Ch. 20 - Prob. 14PCh. 20 - Prob. 15PCh. 20 - Prob. 16PCh. 20 - Prob. 17PCh. 20 - Prob. 18PCh. 20 - An existing rural 4-lane highway is to be replaced...Ch. 20 - Prob. 20PCh. 20 - Prob. 21PCh. 20 - Prob. 22PCh. 20 - Prob. 23PCh. 20 - Prob. 24PCh. 20 - Prob. 25PCh. 20 - Prob. 26PCh. 20 - Prob. 27P
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
- An undowelled rigid pavement in a subdivision roadway has thickness equivalent to 300mm. What should be the allowable tensile strength of concrete in MPa in order to support a wheel load equivalent to 9kN?arrow_forwardFind the safe static wheel load that a 360 mm thick rigid pavement could carry without any dowel across the joints if the allowable tensile stress of concrete is 1.5 MPa.arrow_forwardDetermine the thickness of a rigid pavement with a wheel load capacity of 54 kN, if the allowable tensile stress of the concrete is 1.6 MPa. Neglect the effect of dowels.arrow_forward
- An undowelled rigid pavement in a subdivision roadway has thickness equivalent to 300 mm. What should be the allowable tensile strength of concrete in MPa in order to support a wheel load equivalent to 9 kN?arrow_forwardA rigid pavement is designed with a 11-inch slab, an E_c of 6 million Ib/in^2, a concrete modulus of rupture of 432 Ib/in^2, a load transfer coefficient of 3.0, an initial PSI of 4.50, and a TSI of 2.5. The overall standard deviation is 0.56, the modulus of subgrade reaction is 190 Ib/in^3, and a reliability of 90% is used along with a drainage coefficient of 0.87. The pavement is designed assuming that traffic is composed entirely of trucks (50 per day). Each truck has one 20-kip single axle and one 42-kip tandem axle (the effect of all other vehicles is ignored). A section of this road is to be replaced (due to different subgrade characteristics) with a flexible pavement having a SN of 5 and is expected to last the same number of years as the rigid pavement. What is the assumed soil resilient modulus? (Assume that all other factors are the same as for the rigid pavement). Please report your answer as a decimal in units of Ib/in^2. For example, report 3000.6 Ib/in^2 as 3000.6.arrow_forwardXarrow_forward
- A rigid pavement is to be used to carry a wheel load of 58.77 kN. Enough dowels will be used across the joint. The allowable tensile strength of concrete is 1.45 MPa. Thus, what will be the difference in thickness (in mm) between the edge and the center of the pavement?arrow_forwardA rigid pavement is to be designed for a wheel load of 53.5 kN. If the tensile strength of concrete is taken as 1.38, determine the required thickness assuming sufficient dowels and tie bars are provided.arrow_forwardA concrete pavement is to be constructed for a four-lane urban expressway on a subgrade with an effective modulus of subgrade reaction k of 100 lb/in3. The accumulated equivalent axle load for the design period is 3.25 x 106. The initial and terminal serviceability indices are 4.5 and 2.5, respectively. Using the AASHTO design method, determine a suitable thickness of the concrete pavement if the working stress of the concrete is 600 lb/in2 and the modulus of elasticity is 5 x 106lb/in2. Take the overall standard deviation So as 0.30, the load-transfer coefficient J as 3.2, the drainage coefficient as 0.9, and R = 95%.arrow_forward
- 5. A rigid pavement is to be used to carry a wheel load of 54.04 kN. Enough dowels will be used across the joint. What will be the difference in thickness (in mm) between the edge and the center of the pavement? The allowable tensile strength of concrete is 1.42 MPa. Round off to the nearest whole number.arrow_forwardA six-lane concrete roadway is being designed for a metropolitan area. This roadwaywill be constructed on a subgrade with an effective modulus of subgrade reaction k of170 lb/in3. The ESAL used for the design period is 2.5 106. Using the AASHTOdesign method, determine a suitable thickness of the concrete pavement (to thenearest 1⁄2 inch), provided that the working stress of the concrete to be used is650 lb/in2 and the modulus of elasticity is 5 106 lb/in2. Assume the initial serviceability is 4.75 and the terminal serviceability is 2.5. Assume the overall standard deviation, So, as 0.35, the load transfer coefficient J as 3.2, the drainage coefficient, Cd as1.15, and R as 95%.20-14 An existing rural four-lane highway is to be replaced by a six-lane divided expressway(three lanes in each direction). Traffic volume data on the highway indicate that theAADT (both directions) during the first year of operation is 24,000 with the followingvehicle mix and axle loads.Passenger cars…arrow_forwardHelp pls. Thankyouarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Traffic and Highway EngineeringCivil EngineeringISBN:9781305156241Author:Garber, Nicholas J.Publisher:Cengage Learning
Traffic and Highway Engineering
Civil Engineering
ISBN:9781305156241
Author:Garber, Nicholas J.
Publisher:Cengage Learning