Standard method for penetration of bituminous materials



The purpose of ASTM D5 is to measure the penetration values of bituminous materials and asphalt.

Test Details

ASTM D5 uses a penetrometer with a standard needle to test semi-solid and solid bituminous materials, such as roofing shingles. A sample is melted, cooled, and subjected to repeat contact with a needle to determine its penetration value. Different samples may be prepared to test for a variety of variables, such as temperature and other service conditions. A higher penetration value indicates a softer consistency.

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