subject Flexible pavement in rural interstate highway.Design ESAL 3000000Subbase exposed to moisture saturation 4% of time & drainage quality is fair.Base saturation level 10% of time (Fair drainage quality).Mr (HMA) 420,000 psiMr (base) 24,000 psiMr (subbase) 10,000 psiCBR (Subgrade) = 1.0Reliability Level R = 85%So=0.45APSI-2Required: Design the pavement by the AASHTO method

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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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! ᎢᏃᏙᎰ © True Gap graded aggregate improve workability False True Admixtures improve workability of hardened concrete False Slabs 10:53 ص * Cold joints happen in Pavements docs.google.com Beams. Deep pours Asiacell .. *
Problem Exercise: A concrete road 15m wide, 5 km long, is designed with a thickness as shown in the following cross section. Specifying Class A concrete, determine the quantity of 40 kg cement, sand and gravel required. Use 40kg cement bags. 0.2 m 0.2 m 0.2 m 0.25 m 0.2 m
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Enumerate the construction methodology of Portland Cement Concrete Pavement (PCCP) and briefly dicuss it.
an interstate highway pavement composed of a hma surface course, a cement treated base course, and a sand–gravel subbase is to be designed for an esal of 1.2*10^6.the quality of drainage is considered fair because water can be removed from the subbase within a week. however, there is a large amount of precipitation, so more than 25% of the time the pavement will be exposed to moisture levels approaching saturation. the material properties are as follows: effective roadbed soil resilient modulus = 5,500 psi, resilient modulus of subbase = 15,000 psi, unconfined compressive strength of cement-treated base at 7 days = 500 psi, and resilient modulus of hma = 4.3*10^5 psi. assuming a minimum thickness for hma, determine the thicknesses of the surface, base,and subbase courses required. Assuming a minimum thickness for HMA, determine the thicknesses of the surface, base,and subbase courses required.
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Cement Test Results: Tests Weight of w/c ratio Water weight Results Cement Consistency Test 350gr 0.3 105gr 7mm penetration from the bottom Initial setting time 350 gr 0.3 105gr 57 minutes Final setting time350gr 0.3 105gr 2 hours and 57 minutes Fineness test 50gr 0.16% < 0.20% ok Soundness test No such expansion were taken place
Calculate the maximum stress at corner if 4600 kg wheel load is applied on cementconcrete pavement of thickness 180 mm. a) 40 kg/cm² b) 42.59 kg/cm² c) 43.54 kg/cm² d) 44.89 kg/cm²
For the following temperature conditions, calculate the proper PG grade for both 50% and 98% reliabilities (show your calculation).Seven-day maximum pavement temperature of 48°C with a standarddeviation of 2.5°C. Minimum pavement temperature of -21°C with a standard deviation of 3°C.
One of the following is the most suitable cement type for crack-free pavements and slabs: Jet cement O HAC НАС Туре IV O Expansive cement Type V
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A trial mix is required for a pavement slab being constructed exposed to freezing and thawing as well as deicing agents . The trial mix design strength is 32 MPa (including overdesign) with a 75 mm slump. For the sand; FM = 2.80 and its absorption is 1.5%. The coarse aggregate has a nominal maximum size of 25 mm with an absorption of 1.6% and a dry rodded density of 1460 kg/m3. Determine the mix design amounts for the concrete if the coarse aggregate contains 6% water. (keep all calculations and answers to one decimal place except where indicated. That is, round to one decimal place) Design Water = kg/m3 Water to Cement (W/CM) ratio = (two decimal places) Cement Content = kg/m3 Volume of coarse aggregate per unit volume of concrete = (two decimal places) Estimated total mass of concrete = kg/m3 Design mass of coarse aggregate = kg/m3 Actual mass of coarse aggregate = kg/m3 Actual mass of fine aggregate = kg/m3 Actual mass of water added = kg/m3

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