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CRUZ, P. T. da; MARINHO, F. A. M. The role of structure on the equilibrium of unsaturated colluvial and saprolitic soils. In: ENCONTRO SOBRE SOLOS NÃO SATURADOS, 1995, Porto Alegre. Anais... Porto Alegre: UFRGS, 1995. p. 214-249.
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Abstract

The structure of colluvium, lateritic and saprolitic soils is discussed. The existence of clusters, bridges, connectors or lumps of silt and clay are shown through sedimentation tests, and by structural model on tropical soils. An equilibrium equation considering the external net stress (s - ua) and the internal resistant stresses, si , l(ua. - uw) and pc. is proposed. The way the phenomena is shown intend to be a useful way to help the understanding of the behaviour of structured cemented; collapsible and expansive soils. The effectiveness of high values of suction on the strength of soils is discussed using literature results.
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