Traffic and Highway Engineering - With Mindtap
5th Edition
ISBN: 9781305360990
Author: Garber
Publisher: CENGAGE L
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Chapter 18, Problem 14P
To determine
An appropriate asphalt binder for a reliability of 98 percent.
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Subject: Transportation Engineering
An asphalt pavement carries a static wheel load of 125 kN. The circular contact radius of the tire is 180 mm and the transmitted load is distributed across a wide area of subgrade at an angle of 47°. The subgrade bearing value is 0.30 MPa while that of the base is 0.60 MPa. Design the thickness of the pavement and that of the base ?
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Design a pavement for a rural interstate highway. The expected design ESAL is 13x106. The pavement structure is to consist of asphalt concrete with an elastic modulus of 400000psi, a granular base with an elastic
modulus of 26000psi, and a granular subbase with an elastic modulus of 12000psi. The elastic modulus of the subgrade is 8000psi. It is estimated that it will take a week for water to drain from the pavement and that
the pavement will be saturated about 15% of the time. Assume that a reliability level o
about 90% is required and that the initial serviceability index is 4.2 and the final serviceability index is 2.5.
Please kindly answer both.. please give me both answers
Chapter 18 Solutions
Traffic and Highway Engineering - With Mindtap
Ch. 18 - Prob. 1PCh. 18 - Prob. 2PCh. 18 - Prob. 3PCh. 18 - Prob. 4PCh. 18 - Given the specifications for an asphaltic concrete...Ch. 18 - Given the particle size distributions of two...Ch. 18 - Given the particle size distributions of two...Ch. 18 - Given four different types of aggregates to be...Ch. 18 - Prob. 9PCh. 18 - Prob. 10P
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- 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 subgradearrow_forwardGive 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 elasticityarrow_forwardAsaaparrow_forward
- Q1A In a Marshall test, the percentage of asphalt binder by total weight of aggregate is 5.3%. The bulk specifc gravity of aggregate (G)-2.582, the specifc gravity of asphalt binder (G)=1.000, and the density of water 3 (Yw)=1.000 g/cm. If the voids flled with asphalt (VFA) is 70.0% and the effective asphalt binder (Pbe) is 4.0% by total weight of mixture, determine the following properties: a. The absorbed asphalt binder (Pba) b. The bulk specifc gravity of the compacted mixture (Gmb) c. The voids in mineral aggregate (VMA) d. The voids in total mixture (VTM) e. The theoretical maximum specifc gravity of the loose mixture (Gmm) The effective specifc gravity of the aggregate (Gse) الarrow_forwardThe elastic modulus of mid-range aggregate asphalt pavement is 480 MPa while its subgrade has an elastic modulus of 55 MPa. What is the stiffness factor of the flexible pavement? 0.12 0.61 0.34 0.49arrow_forwardAs shown in the figure below, a flexible pavement is consisted of 40 mm dense graded asphalt and 375 mm high standard unbound granular material. Use the Austroads method to characterize the vertical and horizontal modulus of the unbound granular material. Asphalt, Ev=4000 MPa Unbound granular meterial Subgrade, CBR = 5 ttach File Browse Local Files Browse Content Collection 40 mm 375 mmarrow_forward
- What standard PG asphalt binder grade should be selected under the following conditions: The seven-day maximum pavement temperature has a mean of 57°C and a standard deviation of 2°C. The minimum pavement temperature has a mean of -6°C and a standard deviation of 3°C. Reliability is 98%.arrow_forwardAs a materials engineer working for a highway department, what standard PG asphalt binder grade would you specify for each of the conditions shown in the table below. Show all calculations.arrow_forwardA 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.arrow_forward
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