Civil Engineering - Concrete Technology - Discussion
Discussion Forum : Concrete Technology - Section 1 (Q.No. 34)
34.
The preliminary test is repeated if the difference of compressive strength of three test specimens, exceeds
Discussion:
13 comments Page 1 of 2.
Sandesh Nepal said:
1 year ago
As per IS code, the average compressive strength of three values shall be taken as the representative of batch provided the individual variation is not more than 15% of the average strength or difference of 1.5 N/mm2 or 5% cubes fails. Then the test is repeated.
Sagar said:
4 years ago
What action shall be taken if the sample result is invalid based on individual variation is more than 15% despite having the individual test result is 35.17 mpa for M30 grade concrete.
Shall one go for in situ tests?
Please explain me.
Shall one go for in situ tests?
Please explain me.
Ashish said:
5 years ago
The individual variation of test reading should not exceed 15% of the average.
BHARANEEDHARAN said:
5 years ago
15kg/mm2 means 1.5N/mm2.
Am I right?
Am I right?
Uday said:
5 years ago
Strength difference of 15kg/cm2 for 3successive cubes or 5% cubes fails, then test repeated.
Raja said:
6 years ago
I'm agreeing with you complete Galileo.
Galelio said:
7 years ago
Question is wrong "Allowable difference can be known if values of compressive strength is know", is 15% of what?
Option should be in %, how you are going to know the value 15kg/cm2. It should be 15%.
Option should be in %, how you are going to know the value 15kg/cm2. It should be 15%.
SHIVAM said:
7 years ago
AS PER IS-456 "The test results of the sample shall be the average of the strength of three specimens".
The individual variation should not be more than +15 percent of the average. If more, the test results of the sample are invalid.
The individual variation should not be more than +15 percent of the average. If more, the test results of the sample are invalid.
Jinx said:
7 years ago
I didn't get the specimens details it is a cement mortar or concrete cubes.
Abhi said:
8 years ago
5% difference is not considered during test. It is the difference of 15%.
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