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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 following tests are commonly conducted on aggregates to determine their suitability for road construction :
(a) Particle size distribution (gradation)
(b) Presence of deleterious material
(c) Specified gravity and water absorption
(d) Strength
(e) Shape
(f) Stripping
(g) Soundness test
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If y1 and y2 are alternate depths of a rectangular channel show that Yc³ =2y1²y2²/(y1+y2) Also specific energy E = y1²+y1y2+y2²/(y1+y2)
Define Contaminants - underwater inspection of bridge? There are various substances that may be inadvertently incorporated into the concrete matrix (e.g. glass, coal, gypsum),
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describe the general principle of roof design
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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)
Solubility: Bitumen is soluble in carbon disulphide (CS2). The Indian specifications require that the bitumen should have 99 per cent solubility. Lesser value indicates prese
dek type bridge
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