Answer / sk

1.vibrators are used to compact the concrete placed to make
it homogenous mass removing air voids present in it.2.0.2
bags per sq.m 3.no.because it falls in critical zone
4.higher dia bar dia considered 5.isolated footing is a
footing having single column and cg of column and footing
pass from same point.

Answer / kamlesh chauhan

(1)pin or needle vibrattor is used for beams,columns and
slab bottom for vibration of concrete,while plate vibrators
are used on surface to compact the conc in layers.(2)cement
consumption is 0.12 bags.(3)question is not cleared(4)bars
are laps as per lower level for which casting of columns
are over.

Answer / kartik khanna

vertically no. of bricks used of dimensins 19*9*9cm along
with a key mortar dimension of 10mm with each brisk is 10

slly horizontally the no of bricks used will be 10

length of cement used will be 10cm vertically and 8cm
horizontally

so area of cement used is 80 cm^2

1m^2=28.8 bags of cement
.8 *10^-2 m^2=.2304 bags of cement

but if we take mortar of 1:3 ratio instead of cement then
the cement used will be .2304\3=.0768bags of cement

Answer / modipraveen

Hi, I am answering a answer for each question.

Pin/ Needle vibrator are to remove air/void in concrete
generally its used for deep thing like Beam, columns and flat
slab and even slab where heavy reinforcement is used.
Plate vibrator are used to have rigid base like grade slab,
RCC/CC roads.

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