Microstructural-based approach to the interpretation of clays and transitional soils behaviour

Abstract

Microstructural based approach to the modelling of clays and transitional soils behaviour, Distrito Federal, 2016. xxix, 133p., 297 mm (ENC/FT/UnB,

Microscopic and mineralogical characteristics behind the engineering properties of a compacted andesitic volcanic soil

“…In all cases, the void ratios obtained by the combined porosimetry tests were lower than the void ratios of the specimens presented in Table 1. This is a common issue reported by many researchers on porosimetry test carried out in different clayey soil samples (Cordão Neto et al, 2018;Kühn et al, 2021;Lopes, 2016;Pedrotti, 2016;Romero and Simms, 2008) and it could be mainly associated with (i) isolated pores surrounded by solids which are not intruded; (ii) some pores which are accessible only through smaller pores, i.e., they are not detected until smaller pores are penetrated, restricted porosity.…”

Micropore Structure and Fractal Characteristics of Clays Due to Freeze-Thaw and Compression Based on Mercury Intrusion Porosimetry

“…At present, the research methods for investigating soil microstructure mainly include mercury intrusion porosimetry (MIP), gas absorption operations (BET), energy dispersive spectroscopy, computed tomography (CT), and scanning electron microscopy (SEM) (Yamamuro and Wood, 2004;Grimstad et al, 2010;Cuisinier et al, 2011;Gu et al, 2013;Lopes, 2016;Lieb-Lappen et al, 2017). Among them, MIP has been widely used due to its large measurement range and good repeatability of measurement results (Romero and Simms, 2009;Lubelli et al, 2013;Lopes, 2016;Wang et al, 2016).…”

“…At present, the research methods for investigating soil microstructure mainly include mercury intrusion porosimetry (MIP), gas absorption operations (BET), energy dispersive spectroscopy, computed tomography (CT), and scanning electron microscopy (SEM) (Yamamuro and Wood, 2004;Grimstad et al, 2010;Cuisinier et al, 2011;Gu et al, 2013;Lopes, 2016;Lieb-Lappen et al, 2017). Among them, MIP has been widely used due to its large measurement range and good repeatability of measurement results (Romero and Simms, 2009;Lubelli et al, 2013;Lopes, 2016;Wang et al, 2016). Cui and Tang (2011) used MIP to study the evolution of the pore size distribution of natural structures in soft soil during compression, and proposed the concept of the pore structure damage potential, which is used to characterize the variation in the pore distribution with load.…”

Mechanical behaviour of bimodal kaolin clay with aggregates

“…Kaolin clay with flocculated fabric, and larger macro-pores, tends to have higher void ratios and higher compressibility (Prashant and Penumadu, 2007;Yu et al, 2016). In general, loading on compressibility tests impact the macro-pores more than the micropores (Delage and Lefebvre, 1984;Kühn et al, 2021a;Lopes, 2016).…”