(c) Percent passing No. 200 sieve for an A-7-6 soil: ; and the diameter of a standard plate used in plate loading tests is inches. (d) The Corps of Engineers define modulus of subgrade reaction “k" as: (e) In the design of rigid pavements, any correlation of soil modulus with the modulus of subgrade reaction “k" has to include as an additional variable. (f) GPR: (g) Log CBR = 0.84 – 1.26 * Log (PR). What is PR? %3D - (h) SASW: (i) The Hamboldt (HSG) is claimed to be a man-portable instrument that provides a simple, rapid, and precise means of directly measuring in-situ soil modulus. (j) Sketch and define AREA term used in back- calculation:

(c) Percent passing No. 200 sieve for an A-7-6 soil: ; and the diameter of a standard plate used in plate loading tests is inches. (d) The Corps of Engineers define modulus of subgrade reaction “k" as: (e) In the design of rigid pavements, any correlation of soil modulus with the modulus of subgrade reaction “k" has to include as an additional variable. (f) GPR: (g) Log CBR = 0.84 – 1.26 * Log (PR). What is PR? %3D - (h) SASW: (i) The Hamboldt (HSG) is claimed to be a man-portable instrument that provides a simple, rapid, and precise means of directly measuring in-situ soil modulus. (j) Sketch and define AREA term used in back- calculation:

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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As a materials engineer working for a highway department, what standard PG asphalt binder grade would you specify for each of the conditions show in the table. Seven-Day Мaximum Minimum Pavement Recommended PG Grade Pavement Temperature, °C Temperature, "C Case 50% 98% Mean, °C Std. Dev., "C Mean, "C Std. Dev., °C Reliability Reliability 39 1 -32 3.5 54 1.5 -17 2 69 2.5 1.
3- What is meant by JRCP in rigid pavements? Explain its characteristics.
The following figure shows concrete pavement with the layer thickness and elastic modulus as indicated. Assume modulus of rupture of 650 psi, load transfer coefficient of 3.2, serviceability loss from 4.5 to 2.5, and drainage coefficient of 0.9. The bedrock depth and loss of support is not considered for the subgrade. Use the design equation or monograph with 50% reliability to solve the following: 1) Determine the number of ESAL that the pavement can carry before failure. 2) If the daily traffic has 1080 single axles (20-kip), 400 single axles (24-kip), and 680 tandem axles (40-kip), and the annul traffic is the same over the design period, how many years would the concrete pavement last before failure? 8-inch Portland Cement Concrete Ec=4×106 psi 8-inch Granular Subbase Ec=30,000 psi Subgrade Mr = 5000 psi
5. A rigid pavement is to be used to carry a wheel load of 54.04 kN. Enough dowels will be used across the joint. What will be the difference in thickness (in mm) between the edge and the center of the pavement? The allowable tensile strength of concrete is 1.42 MPa. Round off to the nearest whole number.
2. The AASHO present serviceability rating (PSR) was considered an objective quantity used to establish the performance of highway pavement in terms of applied traffic.a. Trueb. False
4.13) A rigid pavement is being designed with the same parameters as used in Problem 4.5. The modulus of subgrade reaction is 300 1b/in? and the slab thickness is determined to be 8.5 inches. The load transfer coefficient is 3.0, the drainage coefficient is 1.0, and the modulus of elasticity is 4 million Ib/in?. What is the design modulus of rupture? (Assume that any parameters not given in this problem are the same as those given in Problem 4.5.) 4.5 has been added for reference.
A rigid pavement is designed with a 11-inch slab, an E_c of 6 million Ib/in^2, a concrete modulus of rupture of 432 Ib/in^2, a load transfer coefficient of 3.0, an initial PSI of 4.50, and a TSI of 2.5. The overall standard deviation is 0.56, the modulus of subgrade reaction is 190 Ib/in^3, and a reliability of 90% is used along with a drainage coefficient of 0.87. The pavement is designed assuming that traffic is composed entirely of trucks (50 per day). Each truck has one 20-kip single axle and one 42-kip tandem axle (the effect of all other vehicles is ignored). A section of this road is to be replaced (due to different subgrade characteristics) with a flexible pavement having a SN of 5 and is expected to last the same number of years as the rigid pavement. What is the assumed soil resilient modulus? (Assume that all other factors are the same as for the rigid pavement). Please report your answer as a decimal in units of Ib/in^2. For example, report 3000.6 Ib/in^2 as 3000.6.
) Flexible pavements suffer from loss of flexibility with aging and become brittle. Explainhow this happens and how it could be treated.
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Problem 1: A flexible pavement section is designed using a CBR of 20 for the subgrade. During construction it is found that the subgrade is softer with a CBR of 7. The contractor proposes to place a layer of select fill on top of the subgrade to compensate for this condition. How thick should the select fill layer be if the original pavement section is 8 inches HMA over 12 inches crushed aggregate base over subgrade. Assume a resilient modulus of 15,000 psi for the select fill and clearly describe the design method used to solve this problem as well as any assumptions and results PROBLEM 2: Design a rigid pavement that will last as long as the flexible structure from problem 1
4- Describe the characteristics and functions of the top layer in a pavement system.
Pls answer w/ complete solution. Asap (Transportation Engineering) Determine the thickness base and subgrade of flexible pavement if the wheel load is 90 kN and has wheel contact area of 88075 sq. mm.. Strength capacity of base is 0.35 MPa and 0.15 MPa for Subgrade.