Article
Chemistry, Physical
Tatiana Nazdracheva, Andrey Morozov, Victor Yavna, Andrei Kochur
Summary: The research investigated the spectral features of kaolinite and montmorillonite, as well as their mixture, under different moisture modes using total reflection IR spectroscopy. Analysis included decomposing experimental spectra into basic spectra to study the formation of water films, moisture redistribution, and plastic characteristics of clays.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Review
Chemistry, Physical
Amin Soltani, Mahdieh Azimi, Brendan C. O'Kelly
Summary: Among the various methods for estimating the plasticity index (PI), empirical correlations based on the linear shrinkage (LS) test are gaining attention. This study aims to assess the potential and limitations of LS-based correlations for PI estimation, and explore the use of LS as a proxy for PI in soil classification. Statistical analyses on a diverse database of 265 fine-grained soils demonstrated that LS can only provide a rough approximation of PI. However, a novel multivariable correlation involving LS and liquid limit (LL) showed promising results for soil classification.
APPLIED CLAY SCIENCE
(2023)
Article
Chemistry, Analytical
Andrey Morozov, Andrey Vasilchenko, Anton Kasprzhitskii, Georgy Lazorenko, Victor Yavna, Andrei Kochur
Summary: Normative documents in many countries allow the use of soils from nearby excavations and quarries for highway and railway subgrade construction, but variations in soil properties along the construction line necessitate input control technologies to ensure construction quality. A method for determining mineral composition based on infrared spectroscopy technologies has been developed in this study to accurately determine the mineral composition of soil building materials.
VIBRATIONAL SPECTROSCOPY
(2021)
Review
Engineering, Civil
Brendan C. O'Kelly
Summary: This discussion article provides commentary on consistency limits determinations for peats and peaty soils. The writer disagrees with the recommended conventional consistency limits tests for peat soils and suggests using a more useful suite of index tests to assess the geotechnical behaviors and properties of these materials.
KSCE JOURNAL OF CIVIL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Jinli Zhang, Hai Li, Junhui Peng, Zhe Zhang
Summary: Low liquid limit clay has poor strength and sensitivity to water, making it difficult to use in construction. Adding lime can improve its properties significantly.
APPLIED SCIENCES-BASEL
(2023)
Article
Soil Science
Emmanuel Arthur, Hafeez Ur Rehman, Markus Tuller, Nastaran Pouladi, Trine Norgaard, Per Moldrup, Lis Wollesen de Jonge
Summary: This study proposes regression models that estimate the Atterberg limits and plasticity index based on hygroscopic water content at different relative humidity values. The results show that measuring water content at higher relative humidity levels provides more accurate estimates of the Atterberg limits. The models based on hygroscopic water content outperformed models based on clay content and organic carbon or CEC in estimating the Atterberg limits.
Article
Engineering, Geological
Masoud S. G. Manafi, An Deng, Abbas Taheri, Mark B. Jaksa, H. B. Nagaraj
Summary: Soil plasticity is an important index property in geotechnical engineering, which determines the shear strength, permeability, and compressibility of soils. However, current standard test methods for soil plasticity are operator-dependent and inconsistent. This study introduces a new qualitative and quantitative approach, the Manafi Method and Apparatus, for determining the liquid and plastic limits of soils. The results show that the new technique provides a more precise and reliable means of soil plasticity determination.
GEOTECHNICAL TESTING JOURNAL
(2022)
Review
Chemistry, Multidisciplinary
Brendan C. O'Kelly, Jacinto Alonso-Azcarate, Jose Manuel Moreno-Maroto
Summary: This paper provides a critical appraisal of the remolding toughness determination of fine-grained soils. It discusses the challenges in directly measuring this property and proposes using plasticity and toughness properties to distinguish different types of plastic soils. The paper also presents new developments in determining soil toughness and suggests a new toughness chart for more accurate soil classification.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Physical
Karol Kulacz, Kazimierz Orzechowski, Balazs Zsirka, Janos Kristof
Summary: This study examines the interactions between unmodified nontronite and nontronite intercalated with formamide. The results show that the low-frequency permittivity of unmodified nontronite is significantly higher than that of the material intercalated with formamide. This may be due to the movement of ions in unmodified nontronite. Intercalation with formamide does not restore the mobility of ions, resulting in a relatively low low-frequency electric permittivity.
APPLIED CLAY SCIENCE
(2022)
Article
Soil Science
Maria Knadel, Hafeez Ur Rehman, Nastaran Pouladi, Lis Wollesen de Jonge, Per Moldrup, Emmanuel Arthur
Summary: This study demonstrated the feasibility of using visible near-infrared spectroscopy as a fast and accurate alternative to conventional methods for determining Atterberg limits in soil samples. Support Vector Machines showed slightly better predictive ability compared to Partial Least Squares regression and Artificial Neural Networks. The newly developed pedotransfer functions provided slightly better estimations for Atterberg limits, indicating the great potential of vis-NIRS for reliable estimates in diverse soil samples.
Article
Geosciences, Multidisciplinary
S. Stanchi, S. Negri, M. E. D'Amico, E. Raimondo, E. Bonifacio
Summary: Fragipan soil horizons are characterized by high bulk density and fine blind pores, impacting Atterberg limits; liquid limit is slightly higher, plastic limit is comparable, with longer pre-wetting time needed; Neural Networks indicate that texture and bulk density mainly influence the transition from plastic to liquid state.
Article
Crystallography
Andrey Morozov, Tatiana Nazdracheva, Andrei Kochur, Victor Yavna
Summary: This study provides data on the IR spectra of kaolinite at different moisture levels and explores the interaction between liquid water and the sorbing basal surfaces of kaolinite. The results suggest that the adsorption effect is weaker than the solvation effect, and it decreases with increasing salinity. The study also observes an increase in peak intensities during the drying process. These findings are valuable for testing theoretical models and computer simulations of moist minerals and salt adsorption mechanisms.
Article
Geosciences, Multidisciplinary
Joseph R. Michalski, Paul B. Niles, Timothy D. Glotch, Javier Cuadros
Summary: Potassium metasomatism is a common geological process that can change the chemistry of large volumes of crust, forming potassium-rich rocks. Remote sensing on Mars has revealed potassium-rich terrains and rocks with evidence of K-enrichment in Gale Crater. This study suggests that the presence of potassium-rich rocks on Mars is consistent with potassium metasomatism, while the possibility of metasomatized crust sourcing the abundant feldspar in Gale Crater.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Soil Science
Pascal Jouquet, Ary Bruand
Summary: Bioturbation by termites is an important process in regulating soil properties in tropical soils. Previous explanations for the presence of clay and 2:1 clay minerals in termite soil include the need for stable structures and access to water. However, this study proposes a new hypothesis that bioturbation behavior can also be explained by termites' limitation for Na+. The impacts of this ecological process on ecosystem functioning and soil fertility are discussed.
BIOLOGY AND FERTILITY OF SOILS
(2023)
Article
Agronomy
Bin Xue, Li Huang, Xiaokun Li, Jianwei Lu, Ruili Gao, Muhammad Kamran, Shah Fahad
Summary: The interaction between soil organic carbon (SOC) and clay minerals is critical for soil fertility and long-term agricultural sustainability. This study found that straw incorporation promoted the accumulation of certain organic compounds in clay fractions within soil aggregates. Furthermore, long-term straw incorporation induced the transformation of clay minerals and iron oxides, selectively stabilizing organic compounds derived from straw in clay fractions.
Article
Engineering, Environmental
Georgy Lazorenko, Anton Kasprzhitskii, Faiz Shaikh, R. S. Krishna, Jyotirmoy Mishra
Summary: The mining industry generates a significant amount of waste rock and tailings, which can harm the environment. Utilizing geopolymer technology offers a green solution to managing these wastes. This article reviews the characteristics of different types of tailings and the technology of preparing geopolymers based on them.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Materials Science, Multidisciplinary
Georgy Lazorenko, Anton Kasprzhitskii, Vasilii Mischinenko, Alexander Kruglikov
Summary: Nanocellulose/geopolymer composites were successfully fabricated, with cellulose nanofibrils effectively enhancing the geopolymer's tensile strength. However, an increase in CNF content led to a dramatic change in mixture consistency, requiring further optimization of composition for full reinforcing potential.
Article
Construction & Building Technology
Georgy Lazorenko, Anton Kasprzhitskii, Elham H. Fini
Summary: This research investigated the influence of shape and size of plastic waste on the properties of geopolymer mortars. The study found that smaller plastic aggregates improved the flowability and mechanical properties of the geopolymer mortars. However, the presence of PET particles resulted in lower compressive strength and splitting tensile strength due to poor interaction with the matrix. Enhancing the adhesion between PET particles and geopolymer mortars could potentially address this issue.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Editorial Material
Crystallography
Georgy Lazorenko, Anton Kasprzhitskii, Zhaohui Li
Article
Materials Science, Ceramics
Georgy Lazorenko, Anton Kasprzhitskii
Summary: A comparative study on water sorption by different components of the binder phase formed in geopolymerization was conducted using the GCMC simulation method. The results showed that structural changes in the host framework significantly affect water sorption properties. The simulation results provide valuable information on the behavior of water confined in geopolymeric binder phase, contributing to a better understanding of water adsorption mechanism.
CERAMICS INTERNATIONAL
(2022)
Article
Green & Sustainable Science & Technology
Georgy Lazorenko, Anton Kasprzhitskii, Elham H. Fini
Summary: This work explores the recycling potential of PET bottle wastes as a substitute for natural sand in GP mixtures, aiming to reduce plastic pollution and promote a circular economy. The study finds that increasing the content of plastic aggregates in GP mortars leads to a decrease in compressive and flexural strength, but replacing a certain volume of sand with plastic aggregates can improve the splitting tensile strength and workability of fresh geopolymer mixes. Additionally, the inclusion of recycled PET bottle wastes in GP mortars offers advantages in lightweight, water absorption, and thermal insulation properties, contributing to the production of sustainable construction materials with environmental and economic benefits.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Crystallography
Andrey Morozov, Tatiana Nazdracheva, Andrei Kochur, Victor Yavna
Summary: This study provides data on the IR spectra of kaolinite at different moisture levels and explores the interaction between liquid water and the sorbing basal surfaces of kaolinite. The results suggest that the adsorption effect is weaker than the solvation effect, and it decreases with increasing salinity. The study also observes an increase in peak intensities during the drying process. These findings are valuable for testing theoretical models and computer simulations of moist minerals and salt adsorption mechanisms.
Article
Physics, Fluids & Plasmas
Vladimir Shapovalov, Andrey Vasilchenko, Victor Yavna, Andrei Kochur, Maksim Okost
Summary: A ground-penetrating radar (GPR) technology was developed to study the process of water drainage in sand layers. The technology allows for accurate determination of the electrophysical properties of the sand layers and visualization of the distribution of water in radar data.
Article
Multidisciplinary Sciences
Anton Kasprzhitskii, Alexander Kruglikov, Yakov Ermolov, Georgy Lazorenko
Summary: The data in this paper were obtained using CASTEP based on the density functional theory (DFT) with considerations of van der Waals interactions and semi-empirical correction. The data include the optimized geometry and electronic properties of non-hydrated cis- and trans-vacant namontmorillonite (MMT) and its equilibrium state after the adsorption of water molecules. The formation of hydration shells by Na+ cation on the basal surface of MMT is also presented. The behavior of crystalline hydroxyl groups and water molecules during adsorption is demonstrated. Data files of the optimized crystal structures and electronic properties can be read by public text editors.
Article
Computer Science, Software Engineering
Anton Kasprzhitskii, Georgy Lazorenko, Victor Yavna
Summary: XMHFL is a computer program that implements the Single Center Expansion method to describe ground, excited, and ionized states of a molecular system with one or more vacancies. Based on a combination of the three-point difference Numerov scheme and Thomas algorithm, XMHFL solvers have a modular architecture allowing for the development of new methods and algorithms, enhancing molecular characterization calculation for X-ray molecular spectroscopy research and education.
Article
Mathematics, Interdisciplinary Applications
Anton Kasprzhitskii, Georgy Lazorenko, Tatiana Nazdracheva, Victor Yavna
Summary: This research evaluates the inhibitory effect of L-amino acids with different side chain lengths on Fe (100) surfaces using Monte Carlo simulation. The study found that nonpolar and basic amino acids exhibit the best adsorption ability and inhibitory efficiency on the iron surface.
