Abstract
Morphology properties of naturally occurring sandy soil deposits are a consequence of the past geological transport history which gives rise to their different shape and size distributions. Five sand samples with different particle size and shape distributions were analysed statistically. Cluster analysis, performance indicators and probability distributions were used to find a representative shape parameter value. Static and dynamic tests were also contemporarily done to study the shear characteristics of the samples. Dimensionless relationships of the critical shear stress (τcr) normalised with respect to the normal stress (σN) against the representative values are presented. Dynamic testing on the samples showed that the modulus reduction curve (G/Gmax) and damping ratio (D) were also dependent on the morphology characteristics of the sand samples.
Highlights
Soil mechanics/science is a prime academic discipline of civil engineering importance, in foundation design and hazardous ground analysis
The influence of particle morphology on the static and dynamic properties of sand was studied in this research
The importance of finding a representative shape parameter from the sand particles is required to have a better understanding on the mechanical properties of the soil based on the shapes of the particles
Summary
Soil mechanics/science is a prime academic discipline of civil engineering importance, in foundation design and hazardous ground analysis. The mechanical behaviour of sand is highly dependent on the interparticle reaction and classification based on the morphological aspects is deemed necessary. Soils differ from other engineering materials because of its morphology characteristics which require a distributed particulate mechanics approach. For sandy soils (assumed cohesionless), the interparticle reactions of sands rely heavily on its initial density, initial confining pressure and most importantly the interlocking structure of the particles. Sand naturally occurs as granular material composed usually of broken rock fragments and mineral particles. Different morphology (size and shapes) characteristics are imposed on the sand particles as a consequence of the prevailing geological transport mechanism such as fluvial, aeolian or glacial process [2].
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