The test commonly adopted to determine the grade of bitumen in terms of its hardness is:

The test commonly adopted to determine the grade of bitumen in terms of its hardness is:

Right Answer is:

The penetration test

SOLUTION

The penetration of the test determines the hardness or softness of bitumen by measuring the depth in tenths of a millimeter to which a standard loaded needle will penetrate vertically in five seconds. In hot climates, a lower penetration grade bitumen like 30/40 bitumen is preferred.

Generally higher softening point indicates lower temperature susceptibility and is preferred in warm climates. For bitumen, the higher the penetration value lower is the softening point.

For bitumen, the higher the penetration value lower is the softening point.

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