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Concrete Pavement:
Thickness
The thickness of concrete pavements is determined from the stresses induced due to loads and temperature. The thickness adopted is generally 30-35 cm for highways and 15-20 cm for low volume roads. The concrete used is of high strength and is of M-40 grade for highways and not less than M-35 for low volume roads.
A sub-base of 100-150 mm thick dry lean concrete (DLC) of strength M-10 is provided below the pavement layer. An antifriction layer of plastic sheet 125 micron is provided between the slab and DLC. A drainage layer is provided for draining any water that enters the sub-grade.
Softening Point Test: The temperature at which bitumen softens is determined by the "Ring and Ball" test (Figure). (a) Diagram of Apparatus at Beginning of Test (b
Define Permissible Bearing Pressure on poly tetra fluoro ethylene? For the purpose of design, it is important to lay down permissible bearing pressure on PTFE sliding surfaces.
Example. With a surveyor compass the angles observed in traversing the lines AB, BC, CD, DE and EF are as. Compute the included angles and indicate them in a neat sketch.
Why IRC 37-2012 has taken 90th percentile for pavement design of expressway or NH while they hav taken 80th percentile for state highway design ????????
WHAT IS PILE CORROSION
Explain briefly shallow foundation?
Calculate the Benefit-Cost Analysis Ratio A city engineer is deciding which of two alternatives to select. If the interest rate is 10% per year, the Benefit-Cost analysis rat
Q. Discontinuity of joint – position of bearing? Expansion joints in a bridge structures cater for movements inlongitudinal, transverse, vertical and rotational forms. Layout a
Major bridge - Major bridge is one of which has a total linear waterway of 18 m or more for multiple span and total linear water way of 12 m or more for single span. Important b
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