a)tell density of steel , concrete, bricks , sand and
aggregates.? b) what is knife test for wooden doors ? c)
what is the meaning of term abrasion? what is tested in it?
d) why pile foundation is provided in BCS?e) By total
station what activities can be performed and on what
principle it works? f) what is creep?
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Answer Posted / suresh
density of steel is 78.5 kN/m^3
density of concrete (light)-5 to 18 kN/m^3
(heavy)-18 to 25 kN/m^3
density of bricks: 15 to 18 kN/m^3
density of sand: 14.5 to 16.5 kN/m^3
density of aggregate:(gravel)-14 to 17 kN/m^3
(granite)-25 to 27 kN/m^3
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