Answer / mohanraj

Gererally it is vary from ratio to ratio. For example C.C
1:2:4 for 20mm gravel. First we add all the ratios ie.,
1+2+4=7.then we divide individual ratio by total ratio and
multiply 1.57m3. Cement=1*1.57/7=.224m3.Sand =
2*1.57/7=.45m3 20mm gravel= 4*1.57/7=.90m3.For 40mm gravel
multiply with 1.52m3.

I have certain queries, please help to solve. a) length of pile bore is 4m.excavation quantity will be area * length where area will be pi/4 * dia*dia. Is this right? b) It is a single reamed pile of 300m dia and reamed dia is 750mm. can any body help me to calculate excavated quantity of this bulb(reamed section),, concrete quantity in bulb with showing the formulas to be used?

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