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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.
Total station - uses and mining: Uses:- Total stations are mainly used by land surveyors and Civil Engineers, either to record features as in Topographic Surveying or to
Q. By which Materials Shank of a spur construct? Shank of a spur is constructed of sand core and its exposed faces are protected by stone pitching. The attack at nose is very h
a) Certain data for the materials used in the construction of the building, e,g, insulation, building materials, air spaces, etc. b) Draw, with appropriate dimensions, the cro
Q. What are advantages and disadvantage of varnishing? Varnish is a clear pale solution of a resinous substance ( like amber, common resin, copal, lac, or shellac 0 dissolved i
Determine the flow velocity in 2,000 ft of 8 inch diameter piping flowing full. The energy lost in piping is 54 ft. Use nominal pipe diameter and C = 140. Solution: Use v =
A clay layer 25 metres thick has a saturated unit weight of 19.2 kN/m 2 . Ground water level occurs at a depth of 5 metres. It is proposed to construct a reinforced concrete founda
Passenger Conveyors: Passenger conveyors are used at locations where a large concentration of passengers has to be moved from one place to another. Escalators are used to conv
Testing of Aggregates: For use in pavement, road aggregates have to be strong, durable and of good shape. A well-graded aggregates adds to the stability of the layer. The fol
Uses of Stones Stones are used in the following civil engineering constructions are described: (i) Stone masonry which is used for the construction of foundations, , columns
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