A pavement consists of 5 inches of asphalt underlain by a crushed stone based course. There is no sub base. The asphalt has an elastic modulus of 350,000 psi at room temperature and the base course has a CBR of 70. Determine the thickness of the crushed stone base needed to reach an SN of 2.85. Assume the base course is saturated 5% of the time and drains within a day

Q: A flexible pavement is constructed with 5 inches of hot mix asphalt wearing surface (material…

A: The compressive stress is the pressure that distorts the material to decrease the material volume.…

Q: As shown in the figure below, a flexible pavement is consisted of 40 mm dense graded asphalt and 375…

A: In order to allow for this "flexing," flexible pavement structures often consist of numerous layers…

Q: QUESTION 4 Normally, a flexible pavement contains: surface layer+base layer surface layer+subgrade…

A: We have to determine answer of question 4 and question 5 in which we have to choose correct option…

Q: Question 18 A rigid pavement has a wheel load capacity of 53.96 kN. The allowable tensile stress of…

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Q: rigid pavement has a wheel load capacity of 59.52 kN. The allowable tensile stress of concrete is…

A: Rigid pavements are made of port land cement concrete slabs that are plotted on a created subbase of…

Q: Characteristics of concrete (rigid) pavement (Select two) Please select all applicable answers.…

A: There are lots of characteristics  of rigid pavement

Q: pav ndex once operational must be 4.2, and is projected to reliability for design is 95% with an…

A: Given:  Thickness of the asphalt wearing surface D1 = 4 In Wearing surface layer coefficient, a1 =…

Q: A concrete pavement is subject to a temperature change of AT = 70°F; a coefficient of thermal…

A: It is required to determine the joint spacing for an undoweled joint. ∆L=CLα∆T+ε Here ∆L is the…

Q: What purpose does the building of the pavement serve? The numerous layers that go into the building…

A: The pavement is a surface that is safe, smooth and durable enough for traffic movement. The main…

Q: 1. What name is given to asphalt based on its consistency at room temperature?  2. Asphalt cement is…

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Q: Discuss various tests used for the quality of aggregate used in flexible pavements.

A: The various tests used for the quality of aggregate used in Flexible Pavements are: Crushing test…

Q: A concrete pavement slab is 20 cm thick, with a modulus of elasticisty of 3x105 kg/cm2 and a…

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Q: Q1: Fill in the following blanks: .... layer. 1. The most superior material is used in ..... 2. The…

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Q: A lexible pavement is to be designed according to the AASHTO design method. The total expected ESAL…

A: Pavement is the subgrade of the structure which is very useful to transfer the load and also to give…

Q: One of the unbound pavement layer road base materials is “Dry-bound Macadam”. When is this material…

A: Traditionally, a covering of stone that is approximately one size and has spaces covered with such a…

Q: A 7-day average high temperature of the pavement at a ¾” depth is expected to be 138 degrees F (std.…

A: Pavement is a hard surface that's covered in concrete or asphalt, like a road or a driveway. If you…

Q: (6) Two AC-20 asphalt concrete core samples sample has a diameter of 4 inches and a thie (a) If the…

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Q: To select an asphalt binder for a specific location, the mean seven-day maximum pavement temperature…

A: Consider the condition which satisfies by high-temperature grade of the pavement. High temperature…

Q: 7. Match the right asphalt material testing 1. The result of this test indicates the extent to 1.…

A: 1) Water content test:- Among the most significant tests for asphalt is indeed the water content…

Q: The spacing between the contraction joints of a CC pavement is 3.5 m. Determine the stress developed…

A: Given: The spacing between the contraction joints of a CC pavement, L = 3.5 m. The coefficient of…

Q: Marshal Test Results Stability (KN) 13.25 Flow Asphalt Content Unit Weight (gm/cm³) 2.378 Air Voids…

A: The Marshall stability test provides the design and test values for the highway or any bitumen road…

Q: A rigid pavement is on a highway with two lanes in one direction, and the pavement is conservatively…

A: Thickness of pavement (D) = 11 inch Modulus of elasticity, Ec = 5,000,000 lb/in2  Concrete modulus…

Q: What is the area of steel required per meter length of Longitudinal joint in a rigid pavement of…

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Q: A flexible pavement is constructed with 4 inches of hot-mix asphalt wearing surface, 10 inches soil…

A: Given:- The depth of the hot-mix asphalt surface = D1 = 4 inch The depth of the soil cement base =…

Q: A rigid pavement is to be used to carry a wheel load of 57.62 kN. Enough dowels will be used across…

A: Load=57.62kN Stress=1.32MPa

Q: Identify the following statement whether it is (True) or (False). If your answer is false, give the…

A: 1. FALSE tie bars are generally provided across longitudinal joints in rigid pavements   2. FALSE…

Q: What standard PG asphalt binder grade should be selected under the following conditions: The…

A: It is required to determine the high temperature grade. High temperature grade=Mean maximum…

Q: Choose standard PG asphalt binder grade for the following condition: (show your calculation) The…

A: PG asphalt binder  PG grading establishes the grade of a binder based on numerous measures of its…

Q: A flexible pavement is constructed with 4 inches of hot-mix asphalt wearing surface, 10 inches soil…

A: Two methods of flexible pavement structural design are empirical design and mechanistic-empirical…

Q: Know the load, warping and frictional stresses on a cement concrete pavement slab as 220 N/mm², 300…

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Q: An interstate highway pavement composed of asphalt surface course, cement treated base course and…

A: Step 1:Step 2:Step 3:

Q: A flexible pavement is constructed with 3 inches of hot-mix asphalt (HMA) wearing surface, 6 inches…

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Q: With a 12-year design life, a flexible pavement was developed for the following daily traffic: 1300…

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Design of pavements

Pavement is a structure that is made up of different layers such as sub-base course layer, base course layer, binder course, and a surface course formed with different materials such as gravel, above the subgrade soil constructed to act as a path or carriageway enabling the movement of vehicles. The surface of the pavement should possess characteristics such as adequate friction, light reflection, and drainage. The pavements are classified based on structural design into rigid pavements, flexible pavements, composite pavements, and unpaved pavements. The process of determining a suitable pavement type, its constituent layers, and its thickness is called pavement design.