The present work attempts to investigate the applicability of using recycled aggregate for the development of pervious concrete and for mitigating liquefaction and reliquefaction effects. The dynamic behaviour of developed recycled aggregate-based pervious concrete pile is compared with natural aggregate-based pervious concrete pile. The study attempts to explore the inherent material properties of pervious concrete keeping permeability equivalent to conventional stone columns but with improved mechanical characteristics with enhanced pore water pressure ratio reduction and soil displacement reduction efficiency under repeated incremental acceleration loading conditions. For testing, 1g shaking table tests were performed with 01 g, 02 g, 03 g and 04 g acceleration loading with 5 Hz frequency. The outcomes obtained from this experimental study infer that recycled aggregate-based pervious concrete pile exhibits a superior performance compared with natural aggregate-based pervious concrete pile. Overall, the use of recycled aggregate found sustainable approach for developing pervious concrete pile and found effective ground improvement application against liquefaction and reliquefaction hazards.

In the chemical industry and in the manufacturing sector, the adsorption properties of porous materials have been proven to be of great interest for the removal of impurities from liquid and gas media. While it is acknowledged that significant progress and literature production have been developed in this field, there have been adsorption studies that failed to further advance our knowledge in generating a better understanding of the prevailing sorption types and dominant adsorption processes. Therefore, this review study has focused on porous materials, their sorption types and their adsorption properties, further investigating the adsorption properties of porous materials at either solid-gas and solid-liquid interfaces, underscoring both the properties of the materials, the characterization and the correlation between the porosity and the adsorption capacity, as well as the emergent interactions between the adsorbent and adsorbate molecules, including the adsorption mechanisms, the types of sorption and the kinetic and thermodynamic information conveyed.

Granular materials - aggregates of many discrete, disconnected solid particles - are ubiquitous in natural and industrial settings. Predictive models for their behavior have wide ranging applications, e.g. in defense, mining, construction, pharmaceuticals, and the exploration of planetary surfaces. In many of these applications, granular materials mix and interact with liquids and gases, changing their effective behavior in non -intuitive ways. Although such materials have been studied for more than a century, a unified description of their behaviors remains elusive. In this work, we develop a model for granular materials and mixtures that is usable under particularly challenging conditions: high -velocity impact events. This model combines descriptions for the many deformation mechanisms that are activated during impact - particle fracture and breakage; pore collapse and dilation; shock loading; and pore fluid coupling - within a thermo-mechanical framework based on poromechanics and mixture theory. This approach allows for simultaneous modeling of the granular material and the pore fluid, and includes both their independent motions and their complex interactions. A general form of the model is presented alongside its specific application to two types of sands that have been studied in the literature. The model predictions are shown to closely match experimental observation of these materials through several GPa stresses, and simulations are shown to capture the different dynamic responses of dry and fully -saturated sand to projectile impacts at 1.3 km/s.

A three-scale constitutive model for unsaturated granular materials based on thermodynamic theory is presented. The three-scale yield locus, derived from the explicit yield criterion for solid matrix, is developed from a series of discrete interparticle contact planes. The three-scale yield locus is sensitive to porosity changes; therefore, it is reinterpreted as a corresponding constitutive model without phenomenological parameters. Furthermore, a water retention curve is proposed based on special pore morphology and experimental observations. The features of the partially saturated granular materials are well captured by the model. Under wetting and isotropic compression, volumetric compaction occurs, and the degree of saturation increases. Moreover, the higher the matric suction, the greater the strength, and the smaller the volumetric compaction. Compared with the phenomenological Barcelona basic model, the proposed three-scale constitutive model has fewer parameters; virtually all parameters have clear physical meanings. (c) 2024 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V.

Mathematical models and numerical simulations are used to analyse and predict the behaviour of porous materials under coupled mechanical and thermal loading conditions in poroelastic thermoelastic studies. This field is crucial in understanding and designing systems involving porous media where mechanical and thermal factors are important. For this reason, this work aims to provide a theoretical study of porous elastic materials surrounded by a magnetic field using the dual phase lag (DPL) model of thermoelasticity. The significance of this study lies in its diverse range of applications across several engineering, and geophysical disciplines, encompassing soil mechanics, geomechanics, petroleum engineering, and civil engineering. An investigation was conducted on an indefinitely long, porous, solid circular cylinder subjected to a constant magnetic field to demonstrate the proposed theoretical framework. The outer surface of the cylinder was thermally shocked and maintained free from any stress or traction. To solve the problem, Laplace transforms and their inverse methods are used. Numerical examples of excess pore water pressure, temperature, displacement, induced magnetic field, and thermal stresses are given at different medium sites. Finally, graphical representations were created to depict the results of field variables across different thermal delays and porosity estimates.