Journal ArticleDOI
The general and congruent effects of structure in natural soils and weak rocks
S. Leroueil,P. R. Vaughan +1 more
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In this article, the engineering properties of naturally occurring sedimentary and residual deposits which are usually treated in geotechnical engineering as ‘soils’ are reviewed, and it is shown that usually they have characteristics due to bonded structure which are similar to those of porous weak rock.Abstract:
The engineering properties of naturally occurring sedimentary and residual deposits which are usually treated in geotechnical engineering as ‘soils’ are reviewed, and it is shown that usually they have characteristics due to bonded structure which are similar to those of porous weak rock. While this structure can arise from many causes, its effects follow a simple general pattern that involves stiff behaviour followed by yield. This yield can be described in a similar way to that occurring due to overconsolidation, although it is a separate phenomenon. The effects of structure are as important in determining engineering behaviour as are the effects of initial porosity and stress-history, which are the basic concepts of soil mechanics. As it can be described in a general way, it is concluded that structure and its effects should be treated as a further basic concept of equal importance. L'article passe en revue les proprietes des depots sedimentaires et residuels naturels qui sont nor-malement traites comm...read more
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Journal ArticleDOI
Geotechnical characteristics of stabilised aged biosolids
TL;DR: In this article, the results of a laboratory testing program on biosolids stabilised with two types of waste materials, namely, bauxsol and fly ash, were reported.
Journal ArticleDOI
An experimental investigation on the effect of thixotropic aging on primary and secondary compression of reconstituted dredged clays
TL;DR: In this paper, a unique relationship was established between yield stress ratio and initial moisture content incorporating the aging time, and the relationship between Cα and Cc is linear in the considered stress range and time.
Journal ArticleDOI
Embankment on sludge: predicted and observed performances
TL;DR: In this article, a case history of an embankment built over soft water-treatment sludge is presented, where the performance of the test embankments was compared with the predicted performance to verify and modify design assumptions.
Journal ArticleDOI
Bonding degradation and stress–dilatancy response of weakly cemented sands
D. Porcino,Vincenzo Marcianò +1 more
TL;DR: In this article, the impact of debonding on the stress-dilatancy behavior of artificially cemented sands was analyzed with particular emphasis on the delayed dilatancy phenomenon, and a bonding degradation curve was determined for each test relating the interparticle cohesion to the magnitude of the total plastic strain vector.
References
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Journal ArticleDOI
On The Yielding of Soils
TL;DR: In this paper, Hvorslev's equation for the shear strength of clay is shown to define a surface in a space of three variables σ, e and τ. The progressive yielding of a sample defines a loading path in this space, and the paths taken by samples in differing tests can be correlated if a boundary energy correction is applied.
Journal ArticleDOI
Stress–strain–strain rate relation for the compressibility of sensitive natural clays
TL;DR: In this paper, four types of oedometer tests (constant rate of strain tests, controlled gradient tests, multiple-stage loading tests and creep tests) were carried out on a variety of Champlain sea clays.
Journal ArticleDOI
Cemented sands under static loading
TL;DR: In this paper, a test program was undertaken to define the nature of the cementation and its effect on behavior of the soils, and a total of 137 laboratory compression and tension load tests were performed on undisturbed samples of naturally and artificially prepared cemented sands.
Journal ArticleDOI
Ninth Laurits Bjerrum Memorial Lecture: "Small is beautiful"—the stiffness of soils at small strains
TL;DR: In this paper, the authors show how field measurements of displacement around foundations and excavations combined with numerical analysis and recent developments in laboratory techniques can be used to estimate the displacement of foundations.
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