Benkelman Beam deflection analysis was carried out on 10 selected pointsof a flexible pavement using a dual wheel load of 4085 kg and 5.6 kg/cm2 pressure.Selected Points 18Deflection (mm) 1.32 1.35 1.60 1.45 1.40 1.52 1.55 1.65 1.61 1.43Determine the thickness of bituminous overlay using the following data:1. Present Traffic = 1500 cvpd2. Pavement temperature= 30°C3. Correction factor for moisture = 1.34. Annual rate growth of traffic = 7.5%

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Benkelman Beam deflection analysis was carried out on 10 selected points of a flexible pavement using a dual wheel load of 4085 kg and 5.6 kg/cm² pressure. Selected Points 1 Deflection (mm) 1.32 1.35 1.60 1.45 1.40 1.52 1.55 1.65 1.61 1.43 7 Determine the thickness of bituminous overlay using the following data: 1. Present Traffic = 1500 cvpd 2. Pavement temperature = 30°C 3. Correction factor for moisture = 1.3 4. Annual rate growth of traffic = 7.5% 10

Benkelman Beam deflection analysis was carried out on 10 selected points of a flexible pavement using a dual wheel load of 4085 kg and 5.6 kg/cm² pressure. Selected Points 1 Deflection (mm) 1.32 1.35 1.60 1.45 1.40 1.52 1.55 1.65 1.61 1.43 7 Determine the thickness of bituminous overlay using the following data: 1. Present Traffic = 1500 cvpd 2. Pavement temperature = 30°C 3. Correction factor for moisture = 1.3 4. Annual rate growth of traffic = 7.5% 10

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter19: Design Of Flexible Highway Pavements

Section: Chapter Questions

Problem 18P

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Question 1:- Design the overlay with the help of following data: (i) Mean 1.0 mm, standard deviation = 0.25 mm (ii) Temperature at the time of measurement=38°C (iii) soil type= clay (iv) Design traffic at the end of 10 years is 1000 cvpd (v) Coverage of the deflection values on pavement = 98% Question 2:- Determine the thickness of rigid overlay for a 10 cm thick slab in good condition. The design thickness required, due to increased ased loading, is 20 cm Created with Mi Notes
Design the thickness of a pavement to carry a wheel load of 52kN based on the following conditions and type of pavement. A rigid pavement with an allowable tensile stress of concrete is 1.8 MPa. Neglect effect of dowels. Use Olders Theory. Assume sufficient dowels are used across the joints. Used Olders Theory. A flexible pavement with an allowable subgrade pressure of 0.14MPa and the max. tire pressure equal to 0.52MPa. This pressure is assumed to be uniformly distributed over the area of tire contact on the roadway according to the principle of cone pressure distribution. 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.
26. Refer to Figure 8 Design 1A attached. For the design of a 4-lane interstate highway, the damage analysis shown in the figure was performed for a 9.5-inch thick slab according to the PCA design approach. This analysis indicates that the 9.5-inch thick slab: a. Only satisfies the fatigue damage condition b. Only satisfies the erosion damage condition c. Satisfies both fatigue damage and erosion damage conditions. d. None of the above the
A homogeneous half-space pavement is loaded by a set of dual tires that carries a total load of 60,000 lb with a tire pressure of 150 p inches. Determine the ESWL for a based on equal contact radius. The clearance between the dual tires is 8 Soci avement of 20 inch in thickness using Huang's chart
A 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).
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 E2
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Benkelman Beam deflection analysis was carried out on 10 selected points of a flexible pavement using a dual wheel load of 4085 kg and 5.6 kg/cm² pressure. 1 2 3 Deflection (mm) 1.32 1.35 1.60 1.45 1.40 1.52 1.55 1.65 1.61 1.43 Selected Points 4 5 6 7 8 Determine the thickness of bituminous overlay using the following data: 9 10 1. Present Traffic = 1500 cvpd 2. Pavement temperature = 30°C 3. Correction factor for moisture 1.3 4. Annual rate growth of traffic = 7.5%
6.1 A set of dual tires is spaced at 34 in. center to center and carries a total load of 45,000 lb with a tire pressure of 100 psi. Assuming the pavement to be a homogeneous half-space, determine the ESWL for a pavement of 25 in. using (a) the Boyd and Foster method, (b) the Foster and Ahlvin method, and (c) Huang's chart based on equal contact radius. [Answer: 32,200 lb, 32,800 lb, 32,800 lb]
A flexible pavement is designed to last 10 years to withstand truck traffic that consists only of trucks with two 18-kip single axles. The pavement is designed for a soil CBR of 10, an initial PSI of 5.0, a TSI of 2.5, an overall standard deviation of 0.40 and a reliability of 90%, and the structural number was determined to be 6. Determine the number of daily trucks traveling in the peak direction. 150,814 B 75,407 C) 37,704 18,852
07. Determine Structural Number and terminal serviceability index value of flexible pavement. Given B and G, value for 32-kip tandem-axle loads. B= 0,4 G= -0.22
12. Refer to Figure II-1 attached. A flexible pavement is to be evaluated according to the AASHTO 1972 design guide. The existing pavement has a weighted structural number=3.4, a regional factor=2.0, and a soil support value=4.5. What would be the approximated number of daily equivalent 18-kip axles to be allowed on this road for a 20-year analysis period?a. 10b. 33c. 100d. 1490