Materials for Civil and Construction Engineers (4th Edition)
Materials for Civil and Construction Engineers (4th Edition)
4th Edition
ISBN: 9780134320533
Author: Michael S. Mamlouk, John P. Zaniewski
Publisher: PEARSON
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Chapter 9, Problem 9.4QP
To determine

Show the asphalt concrete pavement section.

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An urban county with an area of 1,000 mile² has an estimated 18 million miles of vehicular traffic per day and has a large power plant. The power plant produces 350 MW of electricity at an efficiency of 39%, burning 10,000 Btu/lb coal. The vehicle emission factor for VOCs is 6 grams/mile; the coal-fired boiler emission factor for VOCs is 1.4 lb/ton coal; biogenic emission of VOCs is 0.4 kg/km²-hr on the average. Determine the total emissions of VOCs in tons/day from all sources (mobile, power plant, and biogenic).
For automobile, gasoline is a complex mixture of relatively volatile hydrocarbon blended for use in spark-ignition engines. Every time fuel is burned, the carbon is converted to carbon dioxide (CO2), the natural end product of combustion. If we approximate the chemical  formula for gasoline by the compound octane (C8H18) with a density of 739 grams/liter, the stoichiometric reaction for complete combustion is: C8H18 + 12.5O2  8CO2 + 9H2O Thus, for every mole of C8H18 fuel that is burned, eight moles of CO2 are produced, along with nine moles of water vapor. Estimate the CO2 emission in grams per mile for a car getting 12 km/liter of gasoline.
The farming plan of steel structure has 30 ft long simply supported beams spaced at 8 ft apart. The beams carry dead loads (D) and live loads (L). The selected beam size is W 18x50. 1) Based on 0.3Fy allowable stress limit due to dead loads only (D), what will be the maximum D load in psf that can be applied to the beams? Ignore beam weight. 2) Using the D load obtained from Part 1 and based on 0.6Fy allowable stress limit due to combined dead loads and live loads, what will be the maximum live load L in psf  that can be applied to the beams? 3) If the maximum mid span deflection due to live loads (L) is L/360 ( or 1.0 in in this case), what will be the maximum L load in psf  that can be applied to the beams?
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