Civil Engineering - Concrete Technology - Discussion
Discussion Forum : Concrete Technology - Section 2 (Q.No. 19)
19.
ISI has specified full strength of concrete after
Discussion:
54 comments Page 1 of 6.
Jack said:
9 years ago
According to IS 456:2000, Page 16 NOTES, " In the designation of concrete mix M refer to the mix and the number to the specified compressive strength of 150 mm size cube at 28 days, expressed in N/mm2.
i.e. ISI has specified the full strength of concrete after 28days.
i.e. ISI has specified the full strength of concrete after 28days.
Trimzee said:
9 years ago
There are two MCQ's in this manual which is contradictory to each other. One states that ISI specify the full strength of concrete after 28 days, other nullify it,
Kindly mention the correct one.
Kindly mention the correct one.
Parth said:
10 years ago
Full strength of the concrete could not be specified after any particular period pf time as the strength varies from condition of surrounding and how it will be treated after setting?
B.Singh said:
3 years ago
95 - 98 % concrete strength is 28 days.
The full strength of concrete is 3 years.
Because the hydration process of concrete 100 % will be 1 year.
The full strength of concrete is 3 years.
Because the hydration process of concrete 100 % will be 1 year.
(9)
Sujeet dubey said:
7 years ago
For testing of cube = 28 day
For concrete strength total in 3 year.
Because 28-day strength of concrete is 90%.
And 3-year strength 98-99%.
For concrete strength total in 3 year.
Because 28-day strength of concrete is 90%.
And 3-year strength 98-99%.
Mahendrasinh said:
9 years ago
95 - 98 % concrete strength are 28 days. The full strength of concrete 3 years. Because hydration process of concrete 100 % will be 1 years.
Adeel abdullah said:
9 years ago
Concrete gains its ultimate or full strength within 2 to 3 years so this option is not given that ways, So the answer is none of these.
Nasim said:
2 years ago
ASTM standards Usually we specify the 28-day strength, that is, the compressive strength after 28 days' moist cure at 73 ˚F.
Anmol said:
7 years ago
After 28 days, concrete attains 75% of the ultimate strength of 1 year. And it takes 3 years to attain 100% strength.
Hardz said:
8 years ago
It's right Concrete take 3 years to gain full strength but IS suggested to take strength at 28 days as standard.
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