Abstract This paper illustrates the use of rheological measurements as probes for monitoring evolution microstructure Na-montmorillonite dispersions with changes in pore fluid salinity. A novel experimental setup is used to perform repeat large amplitude oscillatory shear (LAOS) on a single specimen, fluid’s salinity increased through controlled injection NaCl brine. The increase first associated higher storage and loss moduli, greater intra-cycle non-linearity, broader range transitions....

Fluid fine tailings (FFTs) generated by the surface mining of oil sand ore bodies are high-water-content, clay-rich materials that contain unrecovered bitumen and additional residual organics, including solvents used during extraction. Despite a large accumulated inventory these despite environmental implications challenges presence organics poses, little is known about differences in different extraction processes effects polymeric flocculation on mineral–organic interactions. This study...

Preloading is a popular technique in ground improvement works on soft compressible soils. Observational methods such as the Asaoka or hyperbolic are widely used practical applications to assess final settlement and degree of consolidation during preloading. In this paper it argued that major cause inaccuracy predicted by method, especially early stages preloading (short assessment periods), neglect effects creep Asaoka's solution. This may also be lack agreement between observational...

Biopolymers are eco-friendly and sustainable replacements for conventional soil treatment materials like cement lime. The objective of this paper is to assess the durability sand treated with varying content biopolymers, without stabilization using clay fillers. Previous studies have shown that treating biopolymers leads an increase in its strength. However, strength long-term such bio-improved affected by severe environmental conditions. In study, xanthan gum locust bean (separately as well...

The use of biopolymers has received research attention for the stabilization and erosion control course-grained soils. However, there are questions remaining on long-term stability biopolymer-treated soils under drying wetting cycles. This work focuses performance xanthan gum (XG) improving mechanical properties sands. Biopolymer-treated samples were subjected to cyclic drying/wetting according ASTM D559/D559M-15 code designed soil-cement mixtures. dissected after each cycle study mechanism...

This study aims to investigate the effect of various types biopolymers, including xanthan gum (XG), guar (GG), and agar (AG), on shear strength granular media. The environmental impacts using traditional materials, such as cement lime, for soil improvement have led geotechnical engineers consider eco-friendly alternatives. Biopolymers, due their low cost abundance, become an attractive alternative improvement. In this study, biopolymers were introduced at a dry mass ratio 1%. Consolidated...

Abstract Polymeric flocculation is widely used to accelerate the dewatering and consolidation of oil sands fluid fine tailings (FFTs). Optimizing requires a fundamental understanding changes internal structure material with polymer addition. Key challenges include sensitivity dose, mixing conditions, composition individual FFTs. Moreover, despite environmental implications, little known effects on mobility residual organics present in tailings. In this paper, advanced rheological tests are...

This paper investigates the load–displacement characteristics of rammed aggregate piers (RAPs) by applying innovative idea simulating ramming procedure aggregates as a fully dynamic process. High radial stresses, induced ramming, play an important role in load–settlement behaviour RAPs. Previously, two simplifying assumptions have been used for considering effects numerical simulations RAPs researchers: (a) prescribed displacement cavity wall, and (b) volumetric strain cavity. The method...