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At what rate is the temperature applied during the softening point test?

At what rate is the temperature applied during the softening point test? Correct Answer 5° per minute

The guidelines to conduct the softening point test are given in the IS code 1205-1978. As per the code, the rate of applying the temperature increase to the sample is 5° per minute. The test is allowed to continue till the bitumen softens and that temperature is noted.

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