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10.94 bags
A system that is critically damped will return to zero more quickly than an overdamped or underdamped system. Underdamping will result in oscillations for an extended period of time, and while overdamped things will return to zero without much (or any, I think) oscillations they will get there more slowly.
One cubic metre of concrete weighs 2.5 Tonnes. Typically, 1m3 of concrete is made up of 350Kg of cement, 700Kg of sand, 1,200Kg of chippings and 150 Litres of water.
the ratio is 1:1:2... so 1 bag of cement is used..ie; cement:sand:aggregate....
from M30 onwards the mixes are designed. they dont have a const ration as in the case of mixes like M10, M15....,M25
critical damping is when the amount of damping is large enough for the system to return toequilibrium as fast as possible without performing oscillations. Hope thatHELPED
100lits
M25 sand in1cum
M25
1:2
to get critical damped system
M25 - M40 can be used..
1 cubic metre of m25 concrete = 2 400 kg, so 2 400 / 50 = 48 bags
critical damping.as in this damping it will retrieve its steady conditions faster in compare with other types of dampings.
M20 give you strength of 20Mpa and M25 give you strength of 25 Mpa after 28 days of curing.
cement consumption in M-25
Coz within the less time,pointer of an analog device gets stablilized and at one point and gives us the required measuring value instantly---this happens in case of critical damping.