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A granular pavement with bituminous seal is to be design for a collector road in urban area. The design lane traffic loading in Equivalent Standard Axles (DESA) is 25 million.Deflection testing revealed that the original subgrade CBR of 3% could be improved to an effective CBR of 6% with lime stabilisation. Available equipment and construction techniques dictate that the stabilised subgrade layer must be 300 mm as-compacted and the cost for stabilisation will be $90.00 per m3.The minimum as-compacted thickness of any unstabilised layer is 100 mm.The following materials are available for your use and are as placed.Material CostCrushed rock, soaked CBR 90 $60.00/ m3Coarse river sand, soaked CBR 30 $45.00/ m3Clayey gravelly sand, soaked CBR 15 $20.00/ m3Silty sand, soaked CBR 7 $15.00/ m3Consider possible pavement options (with and without subgrade improvement) and recommend a final pavement configuration (with appropriate sketches) for adoption. It is essential to provide justification as to why you have selected a particular design for construction. While cost is an important issue, include some discussion on the potential long-term performance of the selected pavement as compared with other pavements.Note: The pavement seal has already been designed, and you do not need to design either seal or other road elements such as slopes, drainage, etc.
The soil properties are Cc = 0.4, Cr = 0.1 and fsat = 18 kN/m3 for both clays, and the water table is 1 m below the soil surface. Determine the settlements when a stress of 60 kPa is applied by the building.
If 500 mL of benzene is spilled in a sealed room (64m^3), and it completely evaporates, what mass of GAC filters (Cmax = 80 mg benzene/1 g GAC) will be required to reach the permissible exposure limit for benzene
Two hemispheric shells are perfectly sealed together, and the internal pressure is reduced to 43 % of atmospheric pressure. The inner radius is 10.5 cm, and the outer radius is 10.75 cm. The seal is located halfway between the inner and outer radi..
What are the merits and demerits of concrete in construction industry?
A bar of monel metal (length L=9 in., diameter d=0.225 in.) is loaded axially by a tensile force P. If the bar elongates by 0.0195 in., what is the decrease in diameter d What is the magnitude of the load P
The center of gravity of the crane is 10 ft from the pin, and the crane weighs 200 lb. What is the tension in the horizontal cable.
the 3.5mg engine is suspended from a 500 kg spreader beam and hoisted by a crane which gives it an acceleration of 4m/s^2 when it has a velocity of 2m/s. determine the force in chains AC and AD during the lift.
The pressure vessel is a steel cylinder which is free to expand in radial direction but cant expand longitudinally.It has the external diameter D of 1192 mm and the wall thickness (t) of 9mm
Determine the required pumping rate. the aquifer has T= 1600 m2/day and the wells each have radius of influence of 600m.
The principal reason for adding stiffeners to the web of the steel beam is to?
why the highest head of the water in the excavation is mathematically guaranteed to occur on the edge of the excavation. explain in mathematical and/or physical.
A separator accepts waste oil at 70% oil and 30% water by weight. The top product stream is pure oil while the bottom underflow contains 10% oil. If a flow of 20 gal/min is fed to the tank, how much oil is recovered
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