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What should be the maximum allowable time for placing ready
mix concrete? The specification requires concrete placement
within 90 minutes of batching at the plant. What is the
significance of this 90 minutes & should this be used as a
rejection criterion? What effects does the concrete has
after that time period?
1) one brass of stone aggregate 20mm is good for how much sq.ft. work of concrete beam and 2) one brass of river sand is good for how much sq.ft. work of concrete beam . if ration is 1:4:6. at the same time how many bags of cement will be required for same work if each bag is of 50 kgs . please help me.
if we know load bearing capacity of the soil and building
load falling in each footing, then how to choose the type of
foundation??? and if it is shallow foundation then which
type of shallow foundation should be choosen i.e either
strip or isolated or raft or combined or cantilever