EXPERIMENT NAME : Standard Test Method (ASTM D5) for Penetration of Bituminous Materials. Purpose of the Test Consistency of a bituminous material expressed as the distance in tenths of a millimeter that a standard needle vertically penetrates a sample of the material under known conditions of loading, time, and temperature. 1. The penetration test is using as a measure of the consistency. Greater values of penetration determine softer steady. 2. The test is widely used all over the world for classifying bituminous materials into different grades. 3. Rely on upon the weather condition and types of construction, bitumen of various penetration grade are using. Generally using grade are 30/40, 60/70 and 80/100. 4. In warmer regions, lower penetration grades are preferred and in colder regions bitumen with higher penetration values are used. 5. The test is not intended to estimate steady of softer materials like cut back which
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