How is the penetration index calculated, and what does it signify?
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November 20, 2024 at 10:23 pm by 吉田 陽一
The Penetration Index (PI) is calculated using penetration and softening point test results. It signifies the temperature susceptibility of bitumen—the degree to which its hardness changes with temperature. A higher PI indicates lower temperature susceptibility, meaning the bitumen maintains consistent performance across temperature variations.
