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Penetration Rate Effect on Miniature Cone Tip Resistance for Different Cohesionless Materials

Kumar, Jyant and Raju, KVSB (2009) Penetration Rate Effect on Miniature Cone Tip Resistance for Different Cohesionless Materials. In: Geotechnical Testing Journal, 32 (4). pp. 375-384.

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Abstract

Cone penetrometer tests were carried out in a 140 mm diameter triaxial chamber by using a miniature cone of diameter 19.5 mm. The rate of cone penetration was varied from 0.01 mm/s to 0.1 mm/s. Tests were performed in (i) clean sand, (ii) silty sand, and (iii) sand added with fly ash. Two different effective vertical pressures (sigma(nu)), 100 kPa and 300 kPa, were employed. It was noted that for clean and silty sand, the effect of penetration rate on the ultimate tip resistance (q(cu)) of the cone was found to remain only marginal. On the other hand, for sand added with 30% fly ash, the variation in q(cu) values with penetration rate was found to become quite significant. The effect of penetratio rate on q(cu) in all the cases was found to increase with a decrease in the rate of cone penetration. It was noted that with an increase in sigma(nu), the effect of penetration rate on q(cu) was found to become smaller. The effect of the cone penetration rate on q(cu) generally reduces with an increase in the relative density of the material.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to ASTM International.
Keywords: cone penetrometer test;laboratory investigations;sand;shear strength;silt
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 01 Jan 2010 12:22
Last Modified: 01 Jan 2010 12:22
URI: http://eprints.iisc.ernet.in/id/eprint/21848

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