Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Question
Chapter 20, Problem 7P
To determine
The types of stresses that are developed in rigid pavements.
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Discuss the following terms briefly:
Emulsion breaking and Cutback curing,
Water bound and aggregate base,
Flexible pavement and Rigid pavements
Cross slope and side slope of road,
Calculate the design thickness in mm (rounded to the nearest tens) at the edges of a rigid pavement with dowels if the:
Allowable tensile strength of concrete = 3.1 MPa
Wheel load = 120 kN
240
250
C 280
300
Find 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.
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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- Discuss various tests used for the quality of aggregate used in flexible pavements.arrow_forward4- Describe the characteristics and functions of the top layer in a pavement system.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_forward
- Problem 32: What is the stiffness factor of a pavement if the modulus of elasticity is 180 MPa and whose subgrade modulus is 40 MPa?arrow_forwardA 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 1.44 MPa. Round off to the nearest whole number.arrow_forwardA 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_forward
- Which of the following is generally not affected by water intrusion in pavement? a. Pore pressure buildup due to traffic b. Damage due to freeze-thaw cycles c. Transverse cracking d. Heaving in problematic subgrades e. Pumping of finesarrow_forwardEvery information is correct. Please do it correctly or let other experts do it. Don't reject A tyre with 230 kPa air pressure distributes a load over an area with circular contact radius of 200 mm. The pavement was constructed with a material that has a modulus of elasticity of 450 MPa and a Poisson's ratio of 0.40. 1.1 Calculate the radial-horizo talking stress and deflection at a point on the pavement surface under the center of the tyre load. [Function values table: A 1 B-0 C-O R-0.5 H=2]arrow_forwardAn 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_forward
- Explain the following rigid pavement distresses with the aid of sketches:i. Fatigue cracking (bottom-up) ii. Fatigue cracking (top-down) iii. Punch-out failurearrow_forwardProblem 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 AASHTOarrow_forwardWhat is the purpose of pavement structure? Discuss various layers in structure of flexible pavement in detail.arrow_forward
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