Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Chapter 20, Problem 11P
To determine
The tensile stress load located at interior of the slab.
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27. Determine the thickness of rigid pavement of the proposed Nagtahan road to carry a max wheel load of 60 kN. Consider the effects of dowel at the center, fc’ = 20 MPa. Allowable tensile stress of concrete pavement is 0.06 fc’.
Compute moment of resistance of a one-way slab of thickness 150 mm. The slab is reinforced with 10 mm diameter bars at 200 mm C/C. Use f'c=20 MPa and fj= 420 MPa.
Given a concrete pavement with a thickness of 8 in. (203 mm), a kvalue of 100 pei (37.1 MN/m³) doweled joints, and no concrete shoulders, determine the allowable repetitions under a 54-kip (240-kN) tridem-axle load based on erosion enteria.
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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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- Repeat Problem 20-12, with the slab containing temperature steel in the form of welded wire mesh consisting of 0.125 in.2 steel/ft width. The modulus of steel, Es, is 30106lb/in.2 , Ec=5106lb/in.2 , and h=6inches .arrow_forwardRepeat Problem 19-7 using two different depths of untreated aggregate bases of 6 in. and 12 in. Highway contractors in your area can furnish rates for providing and properly laying an asphalt concrete surface and untreated granular base. Assume a structural coefficient of 0.12 for the base course. If these rates are available, determine the cost for constructing the different pavement designs if the highway section is 5 miles long and the lane width is 12 ft. Which design will you select for construction?arrow_forwardA slab with S/L = 0.40 has a thickness of 150 mm reinforced with 12 mm - diameter deformed bars at spacing s = 200 mm on center. Assume f'c = 28 MPa and fy = 415 MPa. Use clear cover of 20 mm. What is the safe live load in KN/m it could carry if L = 5 m?arrow_forward
- A dual wheel having a load per tire of 4000 Ib, 80 psi pressure and μ = 0.5. Calculate thetotal pavement deflections due to the dual wheel by two layer theory at the followingradial distances from the centerline of one tire: r=0, 7,14. Assume that E1 = 10 E2arrow_forwarda) Discuss the strategy of pavement evaluation process in detail? b) Write short notes on Dynamic Cone Penetrometer and Road Dynaflect?arrow_forwardPavement Design and Analysis - Design a HMA pavement structure for a 6-lane divided urban highway using the AASHTO method to accommodate the traffic loads and conditions as follows. Give two alternative layer thickness combinations.arrow_forward
- Show complete solution with clear explanation thanks 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 basearrow_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_forwardA dual wheel having a load per tire of 5000 Ib, 70 psi pressure and μ = 0.5. Calculate thetotal pavement deflections due to the dual wheel by one-layer theory at the followingradial distances from the centerline of one tire: r=0, 3.5,10.5. (Use Pavement Thickness= 8in).arrow_forward
- Calculate the design thickness in mm (rounded to the nearest tens) at the edge of a rigid pavement with dowels if the: Allowable tensile strength of concrete = 3.0 MPa Wheel load = 117 kNarrow_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
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