e data given below pertain to the design of a flexible pav cial trafic 1213 cvpd ffic growth rate = 8 percent per annum sign life = 12 years hicle damage factor = 2.5 stribution factor = 1.0 e design traffic in terms of million standard axles (msa) to
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- Repeat 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?A 10-in. concrete pavement without concrete shoulders is placed on an untreated subbas ehaving the k value 150 pci. Estimate the allowable corner deflection by the PCA erosio ncriterion if the pavement is subjected to 2 million applications of a given axle load .[Answer: 0 .0468 in . ]A 10-in. concrete pavement without concrete shoulders is placed on an untreated subbas ehaving the k value 150 pci . Estimate the allowable corner deflection by the PCA erosio ncriterion if the pavement is subjected to 2 million applications of a given axle load .
- Subject : Transportation Engineering Give me both a and b right solutions A 5 tonne wheel load is applied on a pavement and generates a surface deflection of 0.15 mm. (a) If the equivalent radius of tyre contact is 100 mm and Poisson’s ratio is 0.3, what is the pavement’s modulus of elasticity? (b) If the pavement is 125 mm thick, what is the vertical stress at the top of the subgrade?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 E212. 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
- 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).The traffic on the design lane of a proposed four-lane rural interstate highway consists of 40 percent trucks. If classification studies have shown that the truck factor can be taken as 0.45, design a suitable flexible pavement if the Average Annual Daily Traffic (AADT) on the design lane during the first year of operation is 1000, initial serviceability (Po) = 4.4, and terminal serviceability (Pt) = 2.5. Growth rate = 4 percent Design life = 20 years Reliability level = 95 percent The pavement structure will be exposed to moisture levels approaching saturation 20 percent of the time, and will take about one week for drainage of water. California Bearing Ratio (CBR) of the subgrade material is 7. CBR of the base and subbase are 70 and 22 respectively, and Resilient Modulus (Mr) for asphalt concrete is 450,000 lb/in2.Give me right solution... Urgent please A 5 tonne wheel load is applied on a pavement and generates a surface deflection of 0.15 mm. A. If the pavement is 125 mm thick, what is the vertical stress at the top of the subgrade? B. If the equivalent radius of tyre contact is 100 mm and Poisson’s ratio is 0.3, what is the pavement’s modulus of elasticity
- 11. The range of typical terminal serviceability indices (pt) used in design of highway pavements is:a. -1.0 and 0.0b. 0.0 and 1.0c. 2.0 and 2.5d. 10.0 and 20.0 14. In the AASHTO 1986 and 1993 design guide, the following modification(s) was(were) incorporated in the design procedure:a. Reliabilityb. Changes in modulus of elasticity subgrade materials due to climatec. Drainage layersd. All of the above15. Interstate highways should be designed for a lower level of reliability as compared to secondary roads.a. Trueb. False 17. In the Asphalt Institute flexible pavement design approach, Where are the critical stress and strain locations checked?a. Top of the asphalt concrete layerb. Middle of the asphalt concrete layerc. Bottom of the asphalt concrete layerd. Bottom of the asphalt concrete layer and top of the subgrade 19. In the Portland Cement Association (PCA) design of rigid highway pavements, the design approach is based on:a. Fatigue Damageb. Erosion Damagec. Both Fatigue Damage and…A pavement was designed to have 50 mm bituminous surface course, bituminous binder course 190 mm, 200 mm crushed aggregate road base, and 150 mm granular subbase. The designed was based on the number of ESALs for the base year is 1.4 million, design period is 20 years and average annual traffic growth factor is 4.5%. Using these data: Determine the Subgrade modulus design input value and Estimate the design traffic (ESAL DES).Problem 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 AASHTO