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Proctor penetration resistance |
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standard penetration resistance, Proctor penetration resistance 1. The unit load required to maintain a constant rate of penetration of a probe into a soil. 2. The unit load required to produce a specified penetration into a soil, at a specified rate of penetration; for a Proctor needle, the specified penetration is 2.5 in. (6.35 cm) and the penetration rate is 0.5 in. (1.27 cm) per second. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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