Article
Green & Sustainable Science & Technology
Pelin Pasabeyoglu, Gkiokchan Moumin, Lamark de Oliveira, Martin Roeb, Burcu Akata
Summary: This study introduces the solar calcination method for aluminosilicate clay kaolin to produce metakaolin, which can be used as a precursor for zeolite synthesis. The results demonstrate that the solar-calcined kaolin is as effective as conventionally calcined kaolin in providing metakaolin for zeolite synthesis. Additionally, high-temperature calcination of kaolin was proven to be an alternative method for synthesizing zeolite 13X without the need for an extra silica source.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Chemistry, Inorganic & Nuclear
Sujitra Onutai, Junya Sato, Takeshi Osugi
Summary: This study investigates the effect of alkali concentration on the production of zeolite in geopolymer materials. Different concentrations of sodium hydroxide were used as activators to synthesize geopolymer-zeolite composite materials. The results show that varying sodium hydroxide concentration can produce different zeolite structures in the composite materials.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Usman Ghani, Shah Hussain, Noor-ul-Amin, Maria Imtiaz, Shahid Ali Khan
Summary: The study investigated the role of calcination in synthesizing geopolymer using a low iron lateritic clay sample, analyzing the effects of different temperatures on the material's properties. Results showed that higher calcination temperatures led to improved quality of the geopolymer.
JOURNAL OF SAUDI CHEMICAL SOCIETY
(2021)
Article
Green & Sustainable Science & Technology
Mohamed El-Tanani, Bassam Z. Z. Mahasneh, Faryza Muhana, Bassam El-Eswed, Fawwaz Khalili, Tariq Alkhrissat
Summary: This study investigates the possibility of using plastic waste as a replacement for silica sand filler in GP mortars. The results show that the compressive strength of metakaolin-based GP mortars containing plastic fillers is satisfactory and lower porosity compared to silica sand fillers.
Article
Crystallography
Guoru Ma, Chengying Bai, Meirong Wang, Peigang He
Summary: Synthetic metakaolin with fixed composition was chemosynthetically produced and used to prepare Na-based geopolymer precursors with various Si/Al molar ratios. Zeolite/geopolymer composites or monolith-type zeolites were successfully fabricated through a hydrothermal process, showing the tunability of composition and transformation potential of geopolymer precursors into zeolite.
Article
Construction & Building Technology
Alexey Manaenkov, Michaela Steinerova, Ekaterina Kukleva
Summary: The study showed that the presence of raw kaolin in metakaolin does not necessarily weaken the performance of geopolymers, and in fact, adding a certain amount of kaolin may even improve the mechanical properties of the final product.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2021)
Article
Materials Science, Ceramics
Alessandro Filipponi, Giulia Masi, Serena Bandini, Maria Chiara Bignozzi
Summary: This study investigates the use of one-part pressed geopolymers as a support for microfiltration membranes. The properties of these materials, including mineralogy, physical characteristics, microstructure, and hydraulic properties, are presented. The geopolymeric membrane flat supports were synthesized through pressing a dry-mixed powder and optimizing the mixing and pressing process. The results show that the geopolymers have high open porosity, pore diameter, and flexural strength, demonstrating their potential as microfiltration support.
CERAMICS INTERNATIONAL
(2023)
Article
Construction & Building Technology
Kiyofumi Kurumisawa, Hiroaki Omatu, Yuta Yamashina
Summary: Geopolymers can be used as part of an artificial barrier during radioactive waste disposal, but research on their characteristics is relatively limited. The diffusion of cesium in geopolymers is influenced by the type of alkali activator and the cesium adsorption capacity. Additionally, the mobility of water also affects the diffusion performance of the geopolymer.
MATERIALS AND STRUCTURES
(2021)
Article
Environmental Sciences
Lucas Felix da Costa Goncalves, Carlos Eduardo Tino Balestra, Miguel Angel Ramirez Gil
Summary: With the aim of producing modular bricks with reduced environmental impacts, this study utilized alkali activation technique to create bricks using clay soil, sand, metakaolin or blast furnace slag. The results showed that the use of compound activator significantly improved the performance of the bricks, including water absorption and compressive strength. Microstructural analysis confirmed the formation of various micro structures from the alkali activation reactions. Life Cycle Analysis indicated that alkali activated bricks emitted at least 35% less CO2 compared to ceramic bricks. Overall, modular bricks made with metakaolin or blast furnace slag and compound activator demonstrated great potential for sustainable brick production.
ENVIRONMENTAL DEVELOPMENT
(2023)
Article
Construction & Building Technology
Hugo Lahalle, Virginie Benavent, Vincent Trincal, Thomas Wattez, Raphael Bucher, Martin Cyr
Summary: This study evaluates the properties of four alkali-activated materials under different water content and temperature conditions, comparing them to ordinary Portland cement. The results show that alkali-activated materials are as reliable as Portland cement in precasting and in situ concreting conditions.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Ayman Ababneh, Faris Matalkah, Bisher Matalkeh
Summary: This study investigated the potential use of six Kaolin samples for producing calcined kaolin-based alkali-activated binders. The chemical analysis revealed a wide range of Al2O3 content in the Kaolin samples, while the difference in SiO2 was minimal. The study found that Kaolin samples with higher pozzolanicity and higher Si/Al ratio were more effective in producing alkali-activated binders with higher compressive strength values.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Patrick Azar, Gabriel Samson, Fabrice Deby, Vincent Trincal, Hugo Lahalle, Virginie Benavent, Martin Cyr
Summary: This study compared the resistance to chloride-induced steel corrosion between two alkali-activated materials (AAMs) and a CEM III concrete. The results showed that the AAMK, activated with sodium silicate, had the best chloride penetration resistance and lowest resistivity compared to CEM III concrete. The AAS, activated with sodium carbonate, had finer porosity and higher chloride fixation capacity, resulting in better chloride resistance and high resistivity. However, the AAS also had low corrosion potential due to sulfide ions from slag dissolution.
CEMENT & CONCRETE COMPOSITES
(2023)
Article
Construction & Building Technology
Hui Peng, Yicong Li, Dong Luo, Yang Liu, C. S. Cai
Summary: The study investigated the reaction degrees of MK and MK-slag blend under alkali activation conditions, finding that the addition of GGBFS can enhance the reaction degree of the MK blend, especially under certain conditions. The degree of reaction of the MK in the blend usually increases then decreases with the increase in GGBFS content, with 40% and 60% GGBFS contents often corresponding to the highest degree of geopolymerisation reaction of the MK.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Crystallography
Pauls P. Argalis, Laura Vitola, Diana Bajare, Kristine Vegere
Summary: The study investigated the physical and mechanical properties of a novel binder based on metakaolin and its composite with zeolite 4A, demonstrating the effectiveness of alkali-activated metakaolin as a binding material for sorbent applications. An inverse relationship was observed between the liquid-to-solid ratio (L/S) and compressive strength, while higher-than-expected zeolite granule attrition was measured at increased pressure levels.
Article
Green & Sustainable Science & Technology
Thomas Vincent, Aliakbar Gholampour, Togay Ozbakkaloglu, Tuan D. Ngo
Summary: The study demonstrates that using un-calcined kaolin materials can reduce the production cost and embodied CO2 of geopolymers, although the production cost is currently higher. This shows potential for achieving cleaner production in the future.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Biochemistry & Molecular Biology
Magdalena Krol, Andrzej Kolezynski, Wlodzimierz Mozgawa
Summary: This study assessed the effects of ion exchange on the vibrational spectra of Zeolite Y, with computed spectra in agreement with experimental data.
Article
Chemistry, Physical
Piotr Rozek, Paulina Florek, Magdalena Krol, Wlodzimierz Mozgawa
Summary: Boroaluminosilicate geopolymers were used to immobilize heavy metals, with the addition of boron enhancing compressive strength but also leading to increased heavy metal leaching. Despite this, heavy metals were almost entirely immobilized, with the exception of lead due to the formation of easily leachable PbO·xH(2)O macroscopic crystalline inclusions.
Article
Chemistry, Physical
Paulina Florek, Magdalena Krol, Piotr Jelen, Wlodzimierz Mozgawa
Summary: In this study, carbon fiber reinforced polymer composites were enhanced by adding graphene oxide nanoparticles to improve adhesion and strength. The results showed an increase in strength and changes in adhesion between components and crack propagation. Spectroscopic methods were used to explain the effects, identifying chemical bonds between the components of the composites.
Article
Chemistry, Physical
Magdalena Katarzyna Krol, Piotr Jelen
Summary: This study investigated the thermal stability and dehydration process of zeolite A using in situ high temperature Fourier transform infrared spectroscopy, revealing that water was gradually removed from the structure during heating and thermal degradation started as early as 550 degrees Celsius. The results contribute to the thermal analysis research of zeolite materials.
Article
Environmental Sciences
Elzbieta Gabrus, Karolina Wojtacha-Rychter, Tomasz Aleksandrzak, Adam Smolinski, Magdalena Krol
Summary: The study demonstrates the advantage of storing carbon dioxide in unmineable coal seams in areas where coal mines will be closed in the future due to unprofitability. Experimental and theoretical research on CO2 capture from medium rank bituminous coals in the Upper Silesia Coal Basin shows promising results in terms of equilibrium, kinetics, and thermodynamics of adsorption.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Physical
M. Krol, A. Kolezynski, P. Florek, P. Jele, D. Kozie, W. Mozgawa
Summary: This paper summarized the recent advances in research of clinker phases using vibrational spectroscopy, including analysis of synthetic clinker minerals and commercial Portland clinker, as well as detailed band assignments in both mid and far infrared ranges.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Construction & Building Technology
M. Krol
Summary: The present study assessed the impact of partially zeolitized expanded glass aggregate on lightweight plaster production. The addition of zeolite did not significantly affect the physical and mechanical properties of the plaster, but noticeably modified its microstructure.
MATERIALS AND STRUCTURES
(2022)
Article
Chemistry, Physical
Magdalena Krol, Justyna Sygula-Cholewinska, Tomasz Sawoszczuk
Summary: This study investigates the possibility of using highly porous zeolite aggregate as an active additive to gypsum binder. The experiments show that zeolite fillers doped with metal ions can modify the microstructure of gypsum composites and exhibit antimicrobial effects.
Article
Construction & Building Technology
Karolina Wojtacha-Rychter, Magdalena Krol, Malgorzata Golaszewska, Joanna Calus-Moszko, Malgorzata Magdziarczyk, Adam Smolinski
Summary: This study investigates the feasibility of using cement bypass dust (CBPD), a byproduct rich in chloride potassium, as an ingredient of concrete. The characteristics of CBPD were analyzed and it was found that the high content of free lime and equivalent alkali in CBPD may cause potential damage to concrete. The compressive strength of concrete samples containing CBPD was lower than the base sample due to increased porosity and water demand. However, the analysis confirmed the expected hydration products in all specimens. The use of controlled amounts of bypass dust as a cement substitute aligns with the principles of circular economy.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Chemistry, Physical
Natalia Sobus, Magdalena Krol, Marcin Piotrowski, Barbara Michorczyk, Izabela Czekaj, Kamil Kornaus, Anita Trenczek-Zajac, Sebastian Komarek
Summary: This paper presents the conditions for modifying natural clinoptilolite zeolite and embedding metals in its structure to give it catalytic properties. The zeolite catalysts were characterized and used for the conversion of dihydroxyacetone (DHA) based biomass. The results showed that different catalysts achieved different yields and selectivities of organic acids.
CATALYSIS COMMUNICATIONS
(2022)
Article
Thermodynamics
Adam Smolinski, Karolina Wojtacha-Rychter, Magdalena Krol, Malgorzata Magdziarczyk, Jaroslaw Polanski, Natalia Howaniec
Summary: The paper explores the application of the gasification technology of refuse-derived fuels (RDF) with bituminous coal in hydrogen production and circular economy development. The research findings indicate that an increase in the proportion of RDF in the fuel blend leads to a decrease in the total gas yield and hydrogen yield. RDF2, with a higher calcium concentration, exhibits a higher H2 yield during co-gasification with coal.
Article
Construction & Building Technology
Maciej Zajac, Magdalena Krol, Frank Bullerjahn, Jan Deja
Summary: This research investigates the carbon-neutralization of the cement industry by using carbon dioxide mineralization of recycled concrete paste. The focus is on the impact of temperature on the enforced carbonation process of cement paste. The results show that enforced carbonation is a rapid process at ambient temperature, but it is further accelerated at elevated temperatures. The reaction extent is also increased with higher temperatures. The carbonation reaction consists of two kinetic stages, with the availability of carbon dioxide controlling the kinetics in the first stage and the dissolution of hydrates controlling it in the second stage. Increased temperature enhances this process by increasing the undersaturation level of the dissolving phases. The main carbonation products are calcium carbonate and alumina-silica gel.
ADVANCES IN CEMENT RESEARCH
(2022)
Article
Spectroscopy
M. Krol, P. Florek, K. Dziza, W. Mozgawa
Summary: C-(A)-S-H phases with different C/S molar ratios were synthesized using the alkali-activation method and heavy metal ions were added. The effects of heavy metal ions on the structure of C-(A)-S-H were investigated using various analytical techniques. It was found that heavy metals could be immobilized through precipitation of insoluble compounds or by replacing Ca2+ ions in the aluminosilicate structure. Another possibility was the incorporation of heavy metal ions at the tetrahedral sites of silicon and/or aluminum.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Physical
Natalia Sobus, Igor Labaj, Magdalena Krol
Summary: In this paper, a one-pot process for converting using a modified clinoptilolite catalyst is presented. Iron, cobalt, and copper were introduced into the zeolite structure as active centers. The modified clinoptilolite catalyst was characterized and the catalytic process yielded various organic acids, including lactic acid, levulinic acid, formic acid, and acrylic acid, depending on the catalyst used and the specific process conditions.
