A conventional flexible pavement has been periodically checked for accumulated permanent deformations in various layers using a multi-depth deflectometer (MDD). The following subgrade soil rut data were obtained: Subgrade Soil Rut (in.) Number of 18-kip Axle Loads 0.1 10,000 0.225 100,000 Estimate the rut depth contributed by the subgrade soil for 1-million 18-kip axle loads.

Q: Question 4 Critically evaluate the degree to which soil water washing is an effective method for…

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Q: Describe the Acceleration of the Soil Improvement Process.

A: The soil improvement processes are as follows: Dry soil mixing: It is a ground improvement technique…

Q: What are the inherent difference between In-Situ soil testing and Laboratory test

A: Context: In-situ vs laboratory testing

Q: • Problem 1 - Classify the soil to be used as a highway subgrade material using AASHTO…

A: The given system classify the soil based on the value of liquid limit, plastic limit and the…

Q: Laboratory testing  for Direct Shear Strength testing of Unsautrated soils

A: This question is related to the Soil Mechanics from Civil Engineering. In this question ask about…

Q: A highway embankment with a volume of 800,000 cy is being constructed by compacting dry gravel…

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Q: Classify according to USCS and AASHTO: a. 73% coarse to fine gravel, 25% coarse to fine sand, 2%…

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Q: A contractor has compacted the base course for a new road and found that the mean value of the test…

A: We will use formula for density.

Q: 10. Refer to Figure III-1 attached. What would be the required slab thickness according to the…

A: we have to find out slab thickness according to the AASHTO 1972 design guide for the following given…

Q: Question - 2: For the road network and traffic in question-1, design pavement structure for road…

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Q: how do the following changes influence the CBR? Use v to judge what the best answer is. California…

A: 1) The cbr value and maximum dry density will reach at maximum value at optimum moisture content.…

Q: In a construction site, the contractor found out that average value of the test samples showed that…

A: Given,  water content, w =14.6% specific gravity, Gs=2.81 unit weight,γ = 18.2 KN/m3 Specified…

Q: Determine the required structure number of the pavement based on the following information: . ESAL=…

A: ESALReliabilityStandard deviation, Initial PSI, Final PSI, Soil resilient modulus, To find: The…

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.