Answer / mugundhan979

AS PER IS CODE FORMULA WAS Fck + 1.65 S
Fck - concrete grade

for M 20 ,M 25 grade s value 4
above M 25 s value was 5

Answer / mohsin khan

force = load/area
force is the pressure which comes after testing the cube in compressive strength machine and load is the the reading which we note and area is constant i.e 22.5 cm2

Answer / mugundhan979

AS PER IS CODE FORMULA WAS Fck + 1.65 S
Fck - concrete grade

for M 20 ,M 25 grade s value 4
above M 25 s value was 5

Answer / m.koti, cosmicon group, vizag

force = load/area
force is the pressure which comes after testing the cube in
compressive strength machine and load is the the reading
which we note and area is constant i.e 22.5 mm2

Answer / swetha

COMPRESSIVE STRENGTH OF CONCRETE IS CALCULATED BY= LOAD AT FAILURE OF THE SPECIMEN/AREA OF SPECIMEN(ie 15cm*15cm=225cm)

Answer / pintu kumar das

after 28days curing compressive strength 100% achieved that means after 28 days 100% pressure can taken .so pressure=load/area.
load means reading of testing machine.
area =(150*150*150)=22.5 mm2 constant.

Answer / done

Seriously I can't believe it. The formulas u r giving is for therotical value of compressive strength . u can calculate that value without making any cube. But for 28 day compressive strength there is machine which applies increasing load untill cube gets failed that load per unit area is nothing but compressive strength. Nowadays we don't have to wait for 28 days as these test are done after 2-3 days on labs n they put these result n their software which will ultimately give the final compressive strength

For more info what's app on 7249474640

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