Question { IOCL, 61118 }

give me the mix proportion for design mix concrete M10 grade
1:4:8

Answer

Nominal mix propertion of M10 PCC grade is 1:3:6 & Nominal
mix propertion of M .75 Is pcc grade for 1:4:8
Normally Mix design consider for above M20 grade as for Is
code 456

Question { 16324 }

how much minimum steel provide in column

Answer

Minimum R/f used in rcc column 8 to 10 % by weight of
concrete volume.
As per IS 456 minimum vertical R/f in squire & rectengle
column should be 04 nos.

Question { 25407 }

what is the minimum compressive strength in 7 days for
m20,m25,m30

Answer

in 7 dayas 70% min. compressive strength required

Question { Modi Builders, 8429 }

what will do when 7days concrete has failed and structure has
constructed?

Answer

If 7 days result not getting,wait for 28 days.if 28 days
result not achived that perticular Quantity part breakdawn.

in any doubt with cube testing result we can also doing
core cutter test or rebound hammer test for at the 07 days
& 28 days sharp time period