Discussion :: Concrete Technology - Section 1 (Q.No.34)
|Amitgoel said: (Jul 30, 2014)|
|Please explain your thought. ! As per IS-456, allowable % age is 15% between three adjacent cubes.|
|Madhu C N said: (Sep 8, 2014)|
|Usually test is repeated if 5% of specimens failed to satisfy the results right.|
|Pankaj Mehra said: (Nov 19, 2014)|
|As per IS 516 Average of three values shall be taken as the representative of the batch provided the Individual variation is not more than ± 15 percent of the average.
Otherwise repeat tests shall be made.
|Abhi said: (Mar 19, 2015)|
|5% difference is not considered during test. It is the difference of 15%.|
|Jinx said: (Aug 14, 2015)|
|I didn't get the specimens details it is a cement mortar or concrete cubes.|
|Shivam said: (Aug 18, 2015)|
|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.
|Galelio said: (Oct 6, 2015)|
|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%.
|Raja said: (Aug 8, 2016)|
|I'm agreeing with you complete Galileo.|
|Uday said: (Oct 28, 2017)|
|Strength difference of 15kg/cm2 for 3successive cubes or 5% cubes fails, then test repeated.|
|Bharaneedharan said: (Feb 13, 2018)|
|15kg/mm2 means 1.5N/mm2.
Am I right?
|Ashish said: (May 18, 2018)|
|The individual variation of test reading should not exceed 15% of the average.|
|Sagar said: (Aug 30, 2018)|
|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.
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