Exploració per tema "Clays"
Ara es mostren els items 1-12 de 12
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A pressuremeter-based evaluation of structure in London Clay using a kinematic hardening constitutive model
(Springer, 2020-08)
Article
Accés obertThe self-boring pressuremeter (SBP) test was designed to measure in situ engineering properties of the ground with a relatively small amount of disturbance. The properties that may be inferred from the test depend on the ... -
Analysis of the micro to macro response of clays to compression
(2022-05)
Article
Accés obertAn investigation of clay microstructure and its evolution under 1D and isotropic compression is presented for different clays. Data from the literature are compared to original results on two Italian clays, obtained using ... -
Bio-nanohybrid catalysts based on L-leucine immobilized in hydrotalcite and their activity in aldol reaction
(2016-06-05)
Article
Accés obertNanohybrid materials based on L-leucine (L-Leu) and hydrotalcites (HT) were prepared by the ion exchange and reconstruction method, under mild synthesis conditions. The location, amount and the form of the immobilized L-Leu ... -
Characterisation of the multi-scale fabric features of high plasticity clays
(Institution of Civil Engineers (ICE), 2019-12)
Article
Accés obertAn investigation of the microstructural features of a high-plasticity clay, in both its natural conditions and reconstituted in the laboratory, is described. Scanning electron microscopy is used here to characterise the ... -
Compacted soil behaviour: initial state, structure and constitutive modelling
(Thomas Telford, 2013-05)
Article
Accés obertThe paper explores the behaviour of compacted soils throughout the (dry density–water content) compaction plane by means of a conceptual framework that incorporates microstructural information. The engineering properties ... -
Influence of soil microstructure on air permeability in compacted clay
(Thomas Telford, 2021-05)
Article
Accés obertThis paper describes an experimental study aimed at evaluating the influence of soil microstructure on air permeability in compacted clay. Air permeability measurements, estimated using the gas pressure decay method, were ... -
Investigation of the evolution of clay microstructure under different loading paths and impact on constitutive modelling
(Iris Publishers LLC, 2020-04)
Article
Accés obertPart of a research programme concerning the investigation of the evolution of clay microstructure under different loading paths is presented. The material is a stiff over consolidated natural clay, strongly bonded by ... -
Large-strain analysis of undrained smooth tube sampling
(Thomas Telford, 2022-01)
Article
Accés obertBorehole tube sampling is a key process of geotechnical engineering. The paper presents numerical analyses of smooth tube sampling in clay using the Particle Finite Element Method (PFEM). The soil is described by a ... -
Microstructural evaluation of the water sensitivity of clayey rocks
(American Society of Civil Engineers (ASCE), 2013)
Text en actes de congrés
Accés restringit per política de l'editorialThe paper presents both macroscopic and microstructural evidence of the water sensitivity of a low porosity clayey rock from Northern Spain. Particular emphasis is focused on the effects of water sensitivity at micro level. ... -
Microwave-assisted furfural production using hectorites and fluorohectorites as catalysts
(2019-09-01)
Article
Accés obertIt has previously been reported that the use of microwave heating, together with the presence of co-solvents, improves the efficiency of furfural production from biomass. Solid acid catalysts can be a good alternative to ... -
Modelling the coupled chemo-hydro-mechanical behavior of structured active clays on basis of quantitative microstructural information
(American Society of Civil Engineers (ASCE), 2013)
Text en actes de congrés
Accés restringit per política de l'editorialBecause of their mineralogy, active clays are very sensitive to changes in the type and concentration of species dissolved in the pore water. At a molecular level, this sensitivity can be explained by variations in the ... -
Simulation of penetration problems in geomechanics
(2017)
Text en actes de congrés
Accés obertThe simulation of penetration problems in geomaterials is a challenging problem as it involves large deformations and displacements as well as strong non-linearities affecting material behaviour, geometry and contact ...