1:1:2 is the logical mix design randomly used in mumbai &
costal part of india
cement consumption will be 500 kg for a M3 and water
requirement will be 300 ltrs for M3.

Mix Design There are two types 1) Nominal mix
2)Design Mix
Nominal mix based in volume nad experience
Proportion 1:1.5:3
Design mix done using IS 10262 Code based on properties of
all ingredients ie sand aggregate water and cement finall
we are going arrive mix proportion in Wt.

AS per IS:456-2000,Concrete grade above M25 has to be
designed mix.for such higher grade W/C ratio,quality of
aggregates,admixtures are equaliy important parameters.So
M30 can never be designed in volumetric batching if
consistent quality control & strength is desired.

Dear I would like discuss in deep beams problem in design
and serviceability. please contribute to prepare a
comprehensive discussion. first deep beam definition:

Kindly tell me how much extra steel bars are provided in a
RCC roof and distance of bends in different sizes of roofs.
Please also tell me that bars provided in chajja are taken
seperate or main bars or short bars are extended in chajja.
please send me the answer@ suhail_akhter@hotmail.com