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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- Q1) If the traffic using the pavement grows at an annual rate of 4 present ,determine the design ESAL for 20 years, if ESAL for one year =78900?If the pavement structure number (SN) is equal to 1 and the terminal serviceability index (TSI) is 2.5. what would be the ESAL value that would correspond to a tandem axle load of 18,000 pounds? O 1.000 O.0.070 O 0.018 O 200050 KPa is equivalent to: O A) 5x 10^6 N/m^2 O B) 5 x 10^5 N/m^2 O0 5 x 10^3 N/m^2 O D) 5 x 10^4 N/m^2 Concrete is required for a plain concrete pavement to be constructed in Southern Alberta. The pavement will be exposed to freezing, thawing, and deicers. If aggregates with a nominal maximum size of 20 mm are used, what is the minimum cement content per cubic meter of concrete as per the CSA Standard? OA) 320 kg O B) 335 kg OO 390 kg OD) 420 kg During Lab 5, the relative density of a coarse aggregate sample was determined. The sample of coarse aggregate was towel dryed to represent this moisture state: O A) OD B) Wet OC SSD O D) Air Dry When performing the slump test, each layer of concrete is rodded times as per CSA specifications: OA) 20 O B) 25 OO 30 O D) 12
- ● Example A pavement is subjected to the single-axle loads shown in the table below. Determine the ESAL for a design period of 20 years using AASHTO EALF and assuming a growth rate of 4% Solution Axle load (kip) 12 14 16 18 Number per day 200.0 117.4 84.5 61.4 Axle load (kip) 20 22 24 26 Number per day ESAL= (ADT), (T) (T) (365) (G) (D) (L) 47.2 21.4 129 6.1 Axle load (kip) 28 30 32 34 Number per day 2.9 1.2 2100 0.7 0.32. What are various failures in Flexible Pavement’s, explain with the help of diagrams?Determine the base thickness of plain concrete pavement (PCP) without dowelled joints using the information and charts provided be • Desired project reliability - 85% Subgrade design CBR-6% • Design period -30 years • Design Traffic 5.0*10* HVAG(B) Note: The information obtained from each table or figure must be stated in the examination script to obtain relevant marks. Table 3.1: Minimum subbase requirements for rigid pavements Design traffic (HVAG) Subbase type 125 mm bound Up to 10⁰ Up to 5x10 150 mm bound or 125 mm LCS Up to 1x10 170 mm bound or 125 mm LCS 150 mm LCS Greater than 1x 10 1 Under CRCP, a heavily bound subbase with an asphalt surfacing is an acceptable alternative 75 Maximum permitted value CBR % Effective subgrade strength used in concrete base thickness determinations 60 50 40 35 30 25 20 15 12 10 Concrete Base 200 Thickness 190 (mm) 180 8. Pavement type 7. 6. 5. PCP Dowelled & CRCP 260 250 240 230 220 210 170 160 150 140 150mm LCS 125mm LCS 8 10 Design subgrade…
- A rigid pavement has a wheel lad capacity of 55.81 kN The allowa Express your answer in 1 decimal place. is164 MPal Determine the thicknoss (cm) of the pavement if dowels are negligible. > A Moving to another question will save this response. Question 13. You have been asked to design the pavement for an access highway to a major truck terminal. The design daily truck traffic consists of the following: 80 single axles at 22,500 lb each, 570 tandem axles at 25,000 lb each, 50 tandem axles at 39,000 lb each, and 80 triple axles at 48,050 lb each. The highway is to be designed with rigid pavement having a modulus of rupture of 600 lb/in? and a modulus of elasticity of 5 million lb/in. The reliability is to be 95%, the overall standard deviation is 0.4, the drainage coefficient is 0.9, APSI is 1.7 (with a TSI of 2.5). and the load transfer coefficient is 3.2. The modulus of subgrade reaction is 200 lb/in'. If a 20-year design life is to be used, determine the required slab thickness.You have been asked to design the pavement for an access highway to a major truck terminal. The design daily truck traffic consists of the following: 80 single axles at 22,500 lb each, 570 tandem axles at 25,000 lb each, 50 tandem axles at 39,000 lb each, and 80 triple axles at 48,000 lb each. The highway is to be designed with rigid pavement having a modulus of rupture of 600lb/in2 and a modulus of elasticity of 5 million lb/in2. The reliability is to be 95%, the overall standard deviation is 0.4, the drainage coefficient is 0.9, ¨PSI is 1.7 (with a TSI of 2.5), and the load transfer coefficient is 3.2. The modulus of subgrade reaction is 200 lb/in3. If a 20-year design life is to be used, determine the required slab thickness
- 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 AASHTO2. Estimate the equivalent 18-kip single-axle load applications (ESAL) for a four-lane pavement (two lanes in each direction) of a rural interstate highway with a truck count of 1,200 per day (including 2-axle, 4-tire panel, and pickup trucks), an annual growth rate of 4%, and a design life of 20 years.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?