| Wed Aug 21, 2013 | Post #1 | S L Gupta (Civil Engg)
Join date: Mar 2008 | Dear Raghavendra
The actual quantity of steel bars can be calculated with the help of plan of the building and structural design. How ever a rough estimate is cement required for slab in 1;2;4 ratio is 85 bag where as in 1;1.5;3 ratio 100 bags for 4.5 '' thick RCC slab. The quantity of steel bars is 1200 to 1400 kg. Use 10 mm dia steel bars for slab.
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| Mon Dec 21, 2015 | Post #2 | Pooja
Join date: Dec 2015 |  Post subject: concrete grade
Sir,
I have house plan for 22.5* 40. Max room size is 11*11. All room corners has
columns. My mistri has 30 years of
onsite experience in residential construction.
I told him to use m15 in column footing and m20 in columns above plinth
level. He said for above mentioned grades we need vibrator and concrete mixer
which is not economical option for smaller plots having maximum span less than
16 feet. He told me to use 1:2.5:4 through out the columns upto 2 storey
building as we needed to mix concrete by hand and if bajri is more then concrete
will not get smooth.
1:2.5:4, or 1:3:3
or 1:3:4 is prevailing commonly in our area when I asked some other mistris.
He will be using mixer and vibrator for rcc slab only
What to do sir? | | |
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| Mon Dec 21, 2015 | Post #3 | S L Gupta (Civil Engg)
Join date: Mar 2008 | te
For hand mix concrete labor do some extra work to mix concrete. use proper ratio 1;1.5; 3 and vibrate with bamboo os Ms steel bars.Mason try to mix more sand and more water so that work is done without any hassle. If necssary mix some coarse sand extra.
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| Thu Dec 24, 2015 | Post #4 | JAI PRAKASH
Join date: May 2014 | You need around 1.8-2.0 tonne of tmt bars. For beams 16 mm. For Lantel 10 mm and 12 mm. You need around 70-75 bags of cement for the Lantel.
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