Article
Construction & Building Technology
Mude Hanumananaik, Mittapalli Sanath Kumar Reddy, Kolluru V. L. Subramaniam
Summary: This study evaluates the behavior of alkali-activated fly ash (AAF) geopolymers at high temperatures and finds that the physical and phase changes in the material are influenced by temperature. The results show that AAF with higher water content experiences an increase in strength at temperatures below 200 degrees C, while AAF with lower water content experiences a decrease in strength. Changes in the NASH gel result in consistent strength loss between 200 degrees C and 600 degrees C, while conversion of the gel leads to strength gain between 600 degrees C and 1,000 degrees C.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2022)
Article
Environmental Sciences
Manu Harilal, R. P. George, John Philip, Shaju K. Albert
Summary: This study demonstrates the enhanced chemical resistance of a blended concrete mix (CFNI) containing 40% fly ash, 2% nanoparticles, and 2% sodium nitrite inhibitor against calcium leaching, acid and sulfate attacks. The addition of nanoparticles and inhibitors reduced w/c ratio, increased surface pH, converted soluble calcium hydroxide into insoluble calcium silicate hydrate, filled pores/voids, and reduced shrinkage and cracking in the concrete. The compact microstructure of CFNI prevented leaching and reduced the ingress of aggressive chemical ions, making it ideal for high-quality, low-permeable concrete structures in natural and industrial environments.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Green & Sustainable Science & Technology
Mohammad A. Al-Ghouti, Yahya S. Al-Degs, Ayoup Ghrair, Mahmoud Ziedan, Hani Khoury, Jafar I. Abdelghani, Majeda Khraisheh
Summary: This paper investigates the development of stable geopolymers using petroleum fly ash. Detailed characterizations of the petroleum fly ash, extraction of metals, and preparation of geopolymers were conducted to analyze the potential application of petroleum fly ash in geopolymers.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Green & Sustainable Science & Technology
Pawel Baran, Marzena Nazarko, Elzbieta Wlosinska, Adam Kanciruk, Katarzyna Zarebska
Summary: The study found that adding perlite during the synthesis of geopolymers can control material elasticity and improve thermal insulation properties, while reducing compressive strength.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Environmental
Elmira Khaksar Najafi, Reza Jamshidi Chenari, Meghdad Payan, Mahyar Arabani
Summary: Geopolymers, made from clay and fly ash, have high sorption capacity, mechanical strength, and durability, making them suitable for landfill liners. The geopolymers meet various criteria for liner materials, with a altered clay structure contributing to a more sustainable material. Additionally, the binding agents create coagulated particles covered by aluminosilicate gels, enhancing sorption capacity and resistance to freeze-thaw cycles.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)
Article
Materials Science, Multidisciplinary
Zhenzhen Jiao, Xueying Li, Qinglin Yu, Qinqin Yao, Ping Hu
Summary: The effects of water-to-fly ash ratio (W/FA), class C fly ash (CF) content, and alkaline content on the setting times and compressive strength of geopolymer pastes were investigated. The results showed that higher CF contents led to shorter setting times and higher compressive strength. All geopolymer samples exhibited a small weight change after exposure to an MgSO4 solution. The low strength geopolymer showed better resistance to sulfate attack due to its increase in compressive strength and decrease in ultrasonic flight-time.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Multidisciplinary
M. A. Gomez-Casero, C. De Dios-Arana, J. S. Bueno-Rodriguez, L. Perez-Villarejo, D. Eliche-Quesada
Summary: Due to the large production and environmental impact of coal fly ash (FA), alternative uses for this by-product are being researched. Geopolymers, a promising building material, can be synthesized using FA as a source of aluminosilicates to replace traditional materials. The synthesized geopolymers showed similar mechanical and thermal properties to control geopolymers, but the MK-FA blended geopolymers had slightly lower compressive strengths and thermal conductivity.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2022)
Article
Construction & Building Technology
Bo Wu, Xue Ma, Yi Xiang, Yuxiang Li, Zuhua Zhang
Summary: This paper investigates the incorporation of butyl stearate into fly ash-based geopolymers to reduce efflorescence potential. Different incorporation methods were studied and the results show that the use of butyl stearate does not change the amorphous nature of activation products but increases the contact angle of the surface, effectively hindering water absorption and ion transportation, and slowing down efflorescence formation. Surface-treated samples exhibited the best performance in terms of leaching, water absorption, porosity, and compressive strength.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Chemistry, Physical
Barbara Kozub, Patrycja Bazan, Dariusz Mierzwinski, Kinga Korniejenko
Summary: This study found that adding 0.5% by weight of melamine fibers can effectively enhance the mechanical properties of geopolymer composites, but their thermal and fire-resistant properties were not confirmed.
Review
Green & Sustainable Science & Technology
Xinyu Li, Chengying Bai, Yingjie Qiao, Xiaodong Wang, Kun Yang, Paolo Colombo
Summary: This review discusses the methods, characteristics, and applications of fly ash-based porous geopolymers, as well as the future development prospects.
JOURNAL OF CLEANER PRODUCTION
(2022)
Review
Energy & Fuels
Pawel Baran, Jakub Sobala, Jakub Szczurowski, Katarzyna Zarebska
Summary: The purpose of this article was to conduct a literature review on managing combustion by-products, specifically fly ash, in a closed-loop economy. The authors focused on synthesizing geopolymers and zeolites using fly ash as a substrate, and proposed the concept of combining their synthesis processes to close the material loop.
Article
Construction & Building Technology
Quanchao Zhang, Dajian Huang, Xiaopeng Zhang, Longyuan Lin, Zhiwu Wang, Wenjie Tang, Xiaohu Qiang
Summary: In this study, a steam-jet mill was used to optimize the fineness and properties of fly ash (FA) as a replacement for metakaolin (MK) in the production of geopolymers. The particle size of FA decreased and the particles changed from spherical to irregular shape with increasing treatment frequency. Different treatment processes and FA substitution ratios were investigated to reveal the hydration mechanism and mechanical properties of geopolymers using XRD, FT-IR, SEM, EDS, and LF-NMR techniques. The results showed that the small particle size and irregular shape of the FA had high activity and excellent filling effect, leading to increased compressive strength of geopolymers.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Yiwei Yang, Bowen Wang, Qiaoming Yuan, Dunwen Huang, Hui Peng
Summary: This study investigates the influence of various factors on the pore structure of fly ash-based geopolymer. The results show that a smaller activator modulus and liquid-solid ratio, and higher activator concentrations lead to a finer pore structure. Increasing the conserving temperature within a certain range reduces the pore diameter and porosity, but excessive temperature increase has the opposite effect. The fractal dimension comprehensively characterizes the pore structure, and the microporous pore surface fractal dimension shows a better correlation with compressive strength.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Green & Sustainable Science & Technology
Katarzyna Zarebska, Piotr Zabierowski, Magdalena Gazda-Grzywacz, Natalia Czuma, Pawel Baran
Summary: Nowadays, appropriate waste management, efficient use of natural resources, and implementing the concept of circular economy are highly concerning issues. The aim of the research was to synthesize geopolymers with insulating properties using waste from the energy sector. The study showed that the addition of perlite additive during the synthesis process positively affected the refractoriness of the materials.
CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY
(2022)
Article
Materials Science, Multidisciplinary
Ong Shee-Ween, Heah Cheng-Yong, Liew Yun-Ming, Mohd Mustafa Al Bakri Abdullah, Ho Li Ngee, Lynette Wei Ling Chan, Ooi Wan-En, Nur Ain Jaya, Ng Yong-Sing
Summary: This research focuses on utilizing low alkali activator content and cold pressing technique to form fly ash-based geopolymers under room temperature conditions. The results demonstrate that specific parameters can lead to optimized mechanical properties in the geopolymers.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Oncology
Eric Padron, Amy Dezern, Marcio Andrade-Campos, Kris Vaddi, Peggy Scherle, Qing Zhang, Yan Ma, Maria E. Balasis, Sara Tinsley, Hanadi Ramadan, Cassandra Zimmerman, David P. Steensma, Gail J. Roboz, Jeffrey E. Lancet, Alan F. List, Mikkael A. Sekeres, Rami S. Komrokji
CLINICAL CANCER RESEARCH
(2016)
Article
Chemistry, Physical
Bair G. Bazarov, Jibzema G. Bazarova, Yunna L. Tushinova, Leonid A. Solovyov, Sesegma G. Dorzhieva, Enkhtuul Surenjav, Jadambaa Temuujin
JOURNAL OF ALLOYS AND COMPOUNDS
(2017)
Article
Construction & Building Technology
J. Temuujin, A. Minjigmaa, U. Bayarzul, D. S. Kim, S-Ho Lee, H. J. Lee, C. H. Ruescher, K. J. D. MacKenzie
MATERIALES DE CONSTRUCCION
(2017)
Article
Environmental Sciences
J. Temuujin, J. Mapiravana, U. Bayarzul, G. Oyun-Erdene, Ts. Zolzaya, B. Darkhijav, M. Dlamini, C. H. Ruescher
WASTE AND BIOMASS VALORIZATION
(2018)
Article
Chemistry, Physical
Jibzema G. Bazarova, Alexandra V. Logvinova, Bair G. Bazarov, Yunna L. Tushinova, Sesegma G. Dorzhieva, Jadambaa Temuujin
JOURNAL OF ALLOYS AND COMPOUNDS
(2018)
Review
Environmental Sciences
Jadambaa Temuujin, Enkhtuul Surenjav, Claus Henning Ruescher, Jan Vahlbruch
Article
Materials Science, Multidisciplinary
Jadambaa Temuujin, Claus H. Ruescher
Summary: The influences of mechanically activated fly ash on the microstructure and thermal behaviour of atmospheric-cured concrete panels have been evaluated. It was found that milled fly ash-substituted concrete exhibits improved mechanical properties and beneficial pozzolanic reaction under harsh weather conditions.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Geochemistry & Geophysics
Jadambaa Temuujin, Batmunkh Davaabal, Ulambayar Rentsennorov, Enkhtur Odbaatar, Dashnyam Enkhbayar, Tserendagva Tsend-Ayush, Sunjidmaa Danzandorj, Claus Henning Ruescher, Kenneth J. D. MacKenzie
Summary: This paper presents a comparative study of the properties of alkali-activated geopolymer materials prepared using ball-milled and attrition-milled fly ashes. The results showed that continuous attrition milling increased the surface area and reduced the particle size of the fly ash, resulting in improved compressive strength of the geopolymer paste compared to ball milling.
Editorial Material
Chemistry, Multidisciplinary
Suiyi Zhu, Wei Fan, Xinfeng Xie, Jadambaa Temuujin
FRONTIERS IN CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Dongxu Liang, Yidi Gao, Fanrong Kong, Hong Zhang, Yuxin Zhang, Tong Sun, Suiyi Zhu, Xinfeng Xie, Yang Yu, Temuujin Jadambaa, Kaung Htet Oo, Zhan Qu
Summary: A one-dimensional polymeric Fe/S rod with nanoscale diameter was produced using FeCl3 and Na2S/NaOH under atmospheric conditions. By partially or fully replacing Na with K, the rod grew radially to form a long rod with diameters of 1 μm and/or 5-10 μm. The replacement of Na/K in the rod allowed for its retention of shape in an alkaline solution and showed superior efficiency in removing Zn/Cu from electroplating wastewater compared to other reagents. This method not only enables clean production and recycling of K but also offers potential applications in wastewater treatment.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Construction & Building Technology
Dashdondog Oyunbileg, Jamsran Amgalan, Tsegmid Batbaatar, Jadambaa Temuujin
Summary: This study focuses on the preparation and characterization of high-strength concrete by activating ordinary Portland cement with silica fume. The addition of silica fume and the water-cement ratio have been found to have significant effects on the durability of concrete, including freeze-thaw resistance, water permeability, and mechanical and thermal resistance properties. The results show that when appropriately designed, the concrete exhibits excellent compressive strength, low water absorption, and good freeze-thaw and water impermeability durability. The presence of silica fume contributes to the formation of a dense concrete structure and enhances its overall performance.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Materials Science, Ceramics
Ulambayar Rentsennorov, Batmunkh Davaabal, Bayaraa Dovchin, Jadambaa Temuujin
Summary: The potential application of using zeolite A synthesized from fly ash to remove Cr (III) from aqueous solutions was studied. The acid-washed fly ash and NaOH were mixed, heated at various temperatures, and then subjected to hydrothermal treatment at 600 degrees C. The zeolite showed maximum adsorption capacity for Cr (III) at pH 4.0, reaching equilibrium within 30 minutes.
JOURNAL OF CERAMIC PROCESSING RESEARCH
(2021)
Article
Nanoscience & Nanotechnology
Yong-Sik Chu, Batmunkh Davaabal, Dae-Sung Kim, Sung-Kwan Seo, Yoo Kim, Claus Ruescher, Jadambaa Temuujin
REVIEWS ON ADVANCED MATERIALS SCIENCE
(2019)
Article
Materials Science, Ceramics
V. G. Grossman, B. G. Bazarov, Ts. T. Bazarova, L. A. Glinskaya, J. G. Bazarova, J. Temuujin
JOURNAL OF CERAMIC PROCESSING RESEARCH
(2017)
Article
Materials Science, Ceramics
Jadambaa Temuujin, Uyat Bayarzul, Enkhtuul Surenjav, Kim Dae Sung, Chu Yong Sik
JOURNAL OF CERAMIC PROCESSING RESEARCH
(2017)
Article
Construction & Building Technology
Diego J. De Souza, Leandro F. M. Sanchez, Juarez Hoppe Filho, Marcelo H. F. Medeiros
Summary: This paper evaluates the physical and chemical properties of mortar mixtures with different binders and exposed to different sulphate solutions. A theoretical approach to describe the susceptibility of cementitious mixtures against sulphate attack is proposed. The results show that the amount of portlandite and the potential of ettringite formation are well correlated with the expansion and damage caused by sulphate attack.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Yu Chen, Hossein Rahmani, Erik Schlangen, Og uzhan Copurog
Summary: This study presents a method to accelerate the production of limestone-calcined clay-based cementitious materials using Ca(NO3)2 solution in 3D printing, and investigates the effects of adding Ca(NO3)2 solution on the material's properties. The results show that adding Ca(NO3)2 solution can improve buildability, accelerate initial setting, and increase compressive strength.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Jing Xu, Xianzhi Wang, Wu Yao, Qing Chen, Hehua Zhu, Surendra P. Shah
Summary: Concrete cracks in marine engineering are caused by the hostile seawater environment, leading to serious deterioration of infrastructures. Microbial induced carbonate precipitation (MICP) is an effective and environmentally friendly approach for self-healing of concrete cracks. However, the formation and structure of MICP products for crack healing in seawater are still unclear, which hinders the application of MICP in marine structures.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Zhenbo Wang, Peng Sun, Yurun Fan, Yudong Han, Yudong Hu
Summary: This study investigates the potential use of engineered cementitious composites (ECCs) with strain-hardening and self-healing characteristics as a cover material in wet coral sand exposure. The results show that ECCs can effectively close cracks, reduce water permeability, and restore the load-carrying capacity of structures. Additionally, lower strain levels are associated with decreased rebar corrosion.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Zhengxian Yang, Xiaoli Xiong, Kang Li, Bruno Briseghella, Giuseppe Carlo Marano, Shanghong Chen
Summary: This study investigates the long-term volume stability and strength development of engineered cementitious composites (ECC) containing high-volume steel slag (SS). It is found that the strength of ECC with SS starts to decline after 90 days, while the decline is more significant compared to the matrix. The expansion of SS reduces the fracture toughness of the matrix, leading to an increase in toughness and ductility of the ECC. The introduction of ground granulated blast furnace slag (GGBFS) and PVA fibers can reduce the volume expansion and strength loss caused by SS expansion.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Bin Xi, Zhewen Huang, Salam Al-Obaidi, Liberato Ferrara
Summary: This study investigates the self-healing capabilities of Ultra-High Performance Concrete (UHPC) under the combined influence of mechanical and environmental factors. The results reveal that UHPC with narrow cracks exhibits a higher degree of self-healing, especially when exposed to tap water. Furthermore, prolonged exposure mitigates the inhibitory effect of aggressive ions on self-healing.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Zhichao Xu, Huayang Sun, Yanlin Huo, Minjie Jia, Zhitao Chen, Yingzi Yang
Summary: In this study, MXene was used to modify the surface of polyethylene fiber, improving the interfacial properties and tensile properties of strain hardening cementitious composites. The MXene-coated fiber showed increased tensile stress and strain, reduced crack width and spacing, and enhanced frictional bond strength between the fiber and matrix.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Bao Lu, Yeqiang Zhou, Lei Jiang, Zhensen Liu, Guihua Hou
Summary: This study investigated the leaching rate of Ca2+ from magnesium slag (MS) and developed a leaching-carbonation method to convert MS into high-purity vaterite and supplementary cementitious materials. The wet carbonation process with glycine as a crystal modifier successfully produced spherical vaterite with high purity and surface area. The leachate solid residue (LSR) obtained from the leaching process of MS showed a smaller size destruction and higher surface area compared to Portland cement, leading to accelerated hydration process and improved compressive strength and pore structure development. This work provides a novel treatment method for MS and enables its high value-added utilization.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Gustavo Henrique Nalon, Jose Carlos Lopes Ribeiro, Leonardo Goncalves Pedroti, Roberto Marcio da Silva, Eduardo Nery Duarte de Araujo, Gustavo Emilio Soares de Lima
Summary: The mechanical behavior of mortar joints is crucial for masonry's structural performance. This study investigated the effects of different lime/cement ratios and carbon black nanoparticles content on the properties of mortars. The results showed that increasing lime content decreased mortar strength but increased self-sensing properties at the end of the percolation zone.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Yifei Wang, Lei Lei, Caijun Shi
Summary: The effects of DEIPA and EDIPA at dosages of 0.02% and 0.05% on the hydration and strength development of cement-fly ash-limestone ternary blend were investigated. It was found that both dosages of DEIPA and EDIPA promote the chemical effect of limestone and the hydration of aluminates from cement and fly ash. The hydration of silicates was accelerated by 0.02% of DEIPA or EDIPA but delayed by 0.05% due to excessive aluminates hydration. DEIPA and EDIPA also refine the pore structure and increase compressive strength of the blend mortar.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Du Pan, Ditao Niu, Zongjin Li
Summary: A thick-walled cylinder model was developed in this study to analyze the cracking behavior of seawater sea-sand concrete (SSC) cover. Damage variables were introduced to determine the extent of damage for each cracked ring, and a predictive model for the cracking time of SSC cover was established. The accuracy of the model was verified using the Digital Image Correlation (DIC) technique.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Jiangyu Wu, Hong S. Wong, Hao Zhang, Qian Yin, Hongwen Jing, Dan Ma
Summary: This study explores a method of strengthening cemented rockfill by using well-graded gangue and partially replacing Portland cement with fly ash and a premixed low-alkalinity activator. The research investigated the effects of activator dosage and curing time on the mechanical properties, composition, and microstructure of cemented rockfill. Results show improved performance with low cement content and the use of a low-cost activator. The addition of premixed activator to fly ash enhanced the formation of specific minerals and caused densification of the microstructure. The study reveals an effective and low-cost method for recycling mining wastes and reducing cement.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Juntao Dang, Xiaosong Tang, Jianzhuang Xiao, Aihong Han
Summary: This study proposes a solution to improve the fresh stability and thermal insulation of alkali-activated foamed concrete by adding recycled brick powder. The study investigates the effects of activator modulus and Na2O concentration on the properties of alkali-activated foamed concrete with different bases. The presence of alkaline activator negatively affects the foamability and foam stability, but adjusting the activator concentration can achieve shorter initial setting time and higher fluidity loss. In addition, the increased activator concentration resulted in changes in the pore structure of the foamed concrete.
CEMENT & CONCRETE COMPOSITES
(2024)
Article
Construction & Building Technology
Jiandong Zuo, Bo Wu, Biqin Dong, Feng Xing, Jun Ma, Guanqi Wei
Summary: Nitrite ion intercalated Ca-Al and Mg-Al layered double hydroxides (LDHs) were successfully synthesized using two modified methods. The Ca-Al LDH synthesized by hydrothermal method (H-C-LDH) exhibited the best properties. The intercalated LDHs improved the mechanical properties, chloride penetration resistance, and permeability resistance of cement mortars without affecting the fluidity. Additionally, the intercalated LDHs provided better corrosion resistance.
CEMENT & CONCRETE COMPOSITES
(2024)
Review
Construction & Building Technology
Jingbin Yang, Zhenping Sun, Nele De Belie, Didier Snoeck
Summary: This review paper provides an overview of internal curing mechanism, common internal curing agents, and the most promising agent-superabsorbent polymers in alkali-activated materials (AAM) systems. The introduction of voids by internal curing agents typically has a negative impact on mechanical properties, but continuous water release during internal curing counteracts this effect by promoting hydration. While the effect of internal curing in reducing autogenous shrinkage of AAM systems has been well-established, the impact on drying shrinkage varies widely in different studies.
CEMENT & CONCRETE COMPOSITES
(2024)
