The 100g needle assembly and a mechanism for unlocking and locking the needle assembly in any position make up the penetrometer. Penetration test is probably the most popular traditional test on binders, since used to classify bitumen by measuring the depth in tenths of a millimetre to which a standard loaded needle will penetrate vertically in 5 seconds Penetration tests are used to determine how hard or soft bitumen is. The following tests are typically carried out to assess various bituminous material properties. The characteristics of bituminous materials can be evaluated using a variety of tests. Checking Bitumen quality means putting it through several tests to determine its grade, consistency, viscosity, temperature sensitivity, and safety.
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