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Quality Control in Flexible Pavements:
The quality control needed for Flexible Pavements covers the following tests :
(a) Density and Moisture content of sub-grade.
(b) Strength, shape, stripping tests for aggregates.
(c) Strict control over temperature of bitumen, mix.
(d) Amount of binder sprayed in prime coat, tack coat and surface dressing.
(e) Quantity of aggregates spread in surface dressing.
(f) Density and thickness of bituminous macadam, dense bituminous macadam, bituminous concrete and semi dense bituminous carpet.
(g) Marshall Stability values of BC, DBM and SDBC. (h) Profile and longitudinal levels.
Chemical prestressing In prestressed concrete, normally tendons are stretched and are retained in a stretched condition by concrete. Consequently, concrete comes under compres
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Q. Calculation of crack widths arising from thermal movement In the calculation of thermal movement, the below formula is used in most codes: w max =s x a x (T 1 +T 2 )/2
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Recognize the losses of prestress Recognising the losses of prestress which take place after the prestressing OF concrete structural elements, it is to be appreciated that pres
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Question In designig of watermains, how to decide usage of double air valves and single air valves ? Answer Single air control device let squeezing air out of p
1. The center line elevation of the proposed roadway at station is 345+25.50 is 327.36-ft. The existing ground top of cut elevation (ft) is most nearly: 2. A design engineer c
Design a continuous one-way solid slab supported on beams spaced at 4.2m o.c. the width of the beam is 300mm, leaving clear slab spans of 3.9. The slab carries a uniform DL= 6 KPa.
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