Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Chapter 20, Problem 22P
To determine
The minimum depth of concrete pavement required for the design period of
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A rigid pavement is to be used to carry a wheel load of 49KN, the allowable tensile stress of the concrete is 1.4MPa. Sufficient dowels are used across the joints. Design the center of the thickness of the pavement at the center and base
Question 13
A rigid pavement has a wheel load capacity of 59.92 kN. The allowable tensile stress of concrete is 1.29 MPa. Determine the thickness fcm) of the
pavement if dowels are negligible Express your answer in 1 decimal place.
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A flexible pavement having a thickness of 46mm carries a static wheel load of W. The circular contact has an equivalent radius of 150mm. If the load W is assumed to be transmitted across a wide are of subgrade at an angle of 45 degrees compute the value of the wheel load W if the bearing stress of the base is 0.42 MPa
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
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- A 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_forward5. 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 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_forward
- A concrete pavement has 7-in (203 mm) thich, A dowel diameter is: Select one: a. 5/8 in b. 1 in c. 7/8 in d. 3/4 inarrow_forwardA rigid pavement is to be used to carry a wheel load of 53.5 kN. Design the thickness at the edge and at the center of the pavement. The allowable tensile stress of concrete is 1.38 MPa. Sufficient dowels are used across the joints.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_forward
- Mark the correct statement: a) The ISC steps are: Compaction, Expansion and Simple Axial Compression b) The MR Resilience Module measures the variation in stress with permanent deformation, there is no rupture in the test c) The MR Resilience Module can be performed in a triaxial cell and dynamic loading that best represents the pavementarrow_forward. Design the thickness at the edge and at the center of rigid pavement of the proposed ABCD Road to carry a wheel load of 7500 kg. Allowable tensile stress of concrete is 0.065f'. Assume f'c = 20 MPa.arrow_forwardThe highest CBR number is required for A. Pavement B. O Subgrade C. O Subbase D. Basearrow_forward
- Pls answer w/ complete solution. Asap (Transportation Engineering) Determine the thickness base and subgrade of flexible pavement if the wheel load is 90 kN and has wheel contact area of 88075 sq. mm.. Strength capacity of base is 0.35 MPa and 0.15 MPa for Subgrade.arrow_forwardFind the quantity of cement, sand and gravel of the concrete pavement 4" thick as shown in Figure 1-10 using class "B" concrete.arrow_forwardHow sensitive are the critical pavement responses to (a) increased tire pressure, (b) increased subgrade strength, (c) Poisson's ratio changes, (d) lime stabilization of top 6 in. of subgrade, (e) asphalt or cement stabilization of base layer, etc.?arrow_forward
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