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Bulletin of the International Association of Engineering Geology - Bulletin de l'Association Internationale de Géologie de l'Ingénieur : Volume 60, Issue 4, November 2001

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Brief note on the influence of shape and percentage of gravel on the shear strength of sand and gravel mixtures

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Brief note on the influence of shape and percentage of gravel on the shear strength of sand and gravel mixtures

Content Provider	Springer Nature Link
Author	Yagiz, Saffet
Copyright Year	2001
Abstract	The paper records the influence of the shape and the percentage of gravel on the shear strength/frictional angle of sand and gravel mixtures using direct shear tests. The shear strength is mainly derived from the frictional forces developed due to sliding and interlock; they depend on the maximum particle size and shape, the uniformity coefficient, density and the effective normal stress. As the size of material in a mixture is variable, the shear strength also depends upon the ratio of the specimen diameter to the maximum particle size. In this study, two different shapes of limestone were used, angular and rounded, and the maximum gravel size was 6.3 mm in diameter. Air-dried samples were used in the tests. It is concluded that the shape and percentage of gravel have an important influence on the shear strength properties. L'article étudie l'influence de la forme et du pourcentage de graviers, dans des mélanges de sables et graviers, sur la résistance au cisaillement et l'angle de frottement interne, en utilisant des essais de cisaillement direct. La résistance au cisaillement résulte principalement des forces de frottement qui se développent du fait des glissements et de la texture engrenée du matériau. Elle dépend de la taille des plus gros grains, de la forme des grains, du coefficient d'uniformité, de la densité et de la contrainte normale effective. La résistance au cisaillement dépend aussi du rapport du diamètre de l'échantillon à la taille de grain maximum. Dans cette étude, deux formes différentes de granulats calcaire ont été utilisées, anguleuse et arrondie, la taille maximum de gravier valant 6,3 mm. Des échantillons séchés à l'air du laboratoire ont été utilisés pour les tests. Il a été conclu que la forme et le pourcentage de graviers ont une influence importante sur les propriétés de résistance au cisaillement.
Starting Page	321
Ending Page	323
Page Count	3
File Format	PDF
ISSN	14359529
Journal	Bulletin of the International Association of Engineering Geology - Bulletin de l'Association Internationale de Géologie de l'Ingénieur
Volume Number	60
Issue Number	4
e-ISSN	14359537
Language	English
Publisher	Springer-Verlag
Publisher Date	2001-07-14
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Geology Geotechnical Engineering and Engineering Geology

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