Article
Chemistry, Multidisciplinary
Juan Dacuba, Eva Cifrian, Maximina Romero, Tamara Llano, Ana Andres
Summary: The incorporation of fly ash in fired clay bricks contributes to cleaner production practices. This study investigates the impact of two types of fly ash with different unburned carbon content on the technical and environmental aspects of clay bricks. The results show that the properties of the bricks are acceptable when certain percentages of fly ash are used.
APPLIED SCIENCES-BASEL
(2022)
Article
Construction & Building Technology
Jiazheng Sun, Huan Zhou, Haohao Jiang, Wenyi Zhang, Linqiang Mao
Summary: The introduction of fly ash in the production of fired clay brick affects physical, mechanical properties and environmental risk. Washing to remove soluble salts from fly ash is necessary to reduce heavy metal release risk and ensure high performance of the brick products.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Saif Al-Shmaisani, Ryan D. Kalina, Raissa Douglas Ferron, Maria C. G. Juenger
Summary: The availability of traditional siliceous Class F fly ash is decreasing as countries switch to renewable energy sources. To extend the availability of siliceous fly ash, suppliers are distributing blended coal ashes and incorporating other coal combustion products (CCPs) or natural pozzolans. While the characteristics of these blended fly ashes may differ, they perform well in cement-based mixtures.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Aneel Kumar, Rabinder Kumar, Vishan Das, Ashfaque Ahmed Jhatial, Tauha Hussain Ali
Summary: The research shows that adding 4% silica fume can increase the compressive strength of burnt clay bricks by 27.55%, while adding 4% fly ash can increase it by 17.36%. The incorporation of silica fume and fly ash also reduces the weight of burnt clay bricks, water absorption, and efflorescence while increasing structural efficiency.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Maryam Achik, Hayat Benmoussa, Abdellah Oulmekki, Mustapha Ijjaali, Noureddine El Moudden, Abdelhamid Touache, Gil Gonzalez Alvaro, Francisco Guitian Rivera, Antonia Infantes-Molina, Dolores Eliche-Quesada, Olga Kizinievic
Summary: This study investigates the recycling of pyrrhotite ash (PA) waste as a secondary raw material for clay brick bodies, including characterizing the waste and preparing clay bricks with different PA contents for testing. The results suggest that adding up to 30 wt% of PA waste can enhance the possibility of reuse in a safe and sustainable manner.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Nkululeko Z. N. Ndlovu, Alechine E. Ameh, Leslie F. Petrik, Tunde V. Ojumu
Summary: In this study, an alkaline leaching process was used to extract silica from coal fly ash, which was further transformed into a sodalite zeolite. The extracted silica was then treated with water and used to synthesize pure phase ZSM-5 zeolite. The innovative use of water treatment step before the hydrothermal process significantly reduced the production cost and led to a viable synthesis process. This study provides a holistic approach to using coal fly ash as a useful resource for synthesizing zeolites.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Construction & Building Technology
Aleksandr Ketov, Larisa Rudakova, Iakov Vaisman, Iurii Ketov, Viktors Haritonovs, Genadijs Sahmenko
Summary: The use of foamed silicates as an aggregate for lightweight cellular clay bricks manufacturing has shown to maintain good mechanical strength and heat insulation properties.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Aaron N. Adazabra, G. Viruthagiri, John Yirijor
Summary: This study focuses on assessing the characteristics of fired clay bricks made with biomass bottom ashes (BBA) and spent charcoal as substitutes for clay, aiming to reduce the use of non-renewable resources and improve brick performance. The results showed that bricks containing 5% BBA and 9% spent charcoal exhibited compressive strengths that meet the requirements for structural construction and improved thermal efficiency. This study is crucial for economic growth, environmental cleanliness, conservation of natural clay resources, and innovation in fired clay brick product development.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Prinya Chindaprasirt, Anuwat Srisuwan, Chiawchan Saengthong, Siwat Lawanwadeekul, Nonthaphong Phonphuak
Summary: The study showed that incorporating FA-GC in fire clay bricks can improve density and strength, while reducing porosity and water absorption. By using 4% FA-GC at a low firing temperature of 950 degrees C, the clay bricks with required compressive strength can be achieved.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Environmental Sciences
Yiming Huang, Jinling Liu, Guan Wang, Qingfeng Wang, Boping Zeng, Zhongjiu Xiao, Guangyi Sun, Zhonggen Li
Summary: This study investigated the different forms of Hg in coal fly ash from fifteen coal-fired power plants in Guizhou province, and found that Hg was mainly present in strong complexed form. Leaching experiments showed that acidic and strong alkaline conditions could lead to higher Hg leachability.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Construction & Building Technology
Yuecheng Xin, Dilan Robert, Abbas Mohajerani, Phuong Tran, Biplob Kumar Pramanik
Summary: The rapid increase in industrial ash generation has prompted the authorities to find efficient management methods for this harmful waste. This study explores a novel use of industrial ash to manufacture bricks. By testing two different types of industry waste ash at various percentages, the results showed that the new brick product made from industrial waste can outperform traditional bricks in thermal characteristics and compressive strength, while meeting essential compliance requirements.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2023)
Article
Engineering, Chemical
Haiqing Xu, Chunli Liu, Xue Mi, Zhongbing Wang, Junwei Han, Guisheng Zeng, Pengfei Liu, Qian Guan, Haiyan Ji, Shuzhen Huang
Summary: A novel process for extracting lithium from coal fly ash was proposed in this study, achieving over 90% lithium recovery under optimized conditions. The proposed method provides a platform reference for further studies on efficient extraction of resources with similar mineral compositions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Environmental Sciences
Tsugumi Seki, Kengo Nakamura, Yasumasa Ogawa, Chihiro Inoue
Summary: Coal fly ash (CFA) is a useful recycled resource for applications such as cement production. A study in Japan examined the leaching concentration range of toxic elements such as arsenic and selenium in different types of CFA. The study found that the leaching processes of these elements in CFA changed over time depending on environmental conditions, highlighting the importance of managing and evaluating safety for effective utilization of CFA.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2021)
Article
Environmental Sciences
Bing Yuan, Hongyun Hu, Yongda Huang, Biao Fu, Huimin Liu, Guangqian Luo, Yongchun Zhao, Hong Yao
Summary: Selenium in gaseous form is difficult to retain in solid phases during coal combustion due to its high saturated vapor pressure. Understanding the migration of SeO2(g) on ash particles in the low-temperature zone is essential for controlling selenium emission. The physically-bound Se in fly ash consists of selenium condensation and physical adsorption, with mullite showing the best performance in selenium capture at temperatures between 90-200 degrees C.
Article
Energy & Fuels
Junke Zhang, Kejun Wen, Lin Li
Summary: The study used bacteria to bio-modify coal fly ash and found that some metals leaching concentrations decreased while others increased after bio-modification. The increase in pH and carbonate production during bio-modification contributed to the stabilization of certain metals, while organic products and carbonates competition promoted the leaching of other metals.
Article
Materials Science, Ceramics
Pedro J. Sanchez-Soto, Eduardo Garzon, Luis Perez-Villarejo, Dolores Eliche-Quesada
Summary: The sintering behavior of a pyrophyllite clay was investigated, revealing that the bulk density of the ceramic bodies showed slight variations in the range of 1000-1150 degrees C, but significant decreases at 1200 degrees C and 1300 degrees C. The maximum bulk density temperature was determined as 1200 degrees C, and the vitrification temperature was found to be 1300 degrees C. A vitrification rate equation was derived and can be utilized to estimate the optimal firing conditions of pyrophyllite clays as ceramic raw materials.
BOLETIN DE LA SOCIEDAD ESPANOLA DE CERAMICA Y VIDRIO
(2023)
Article
Materials Science, Ceramics
Eusebiu Rat, Sergio Martinez-Martinez, Juan Antonio Sanchez-Garrido, Luis Perez-Vilargejo, Eduardo Garzon, Pedro J. Sanchez-Soto
Summary: In this study, clays from Alhabia, Spain, were analyzed using various analytical techniques. The clay samples were found to have specific mineralogical, chemical, textural, and ceramic properties. They can be used for the fabrication of porous ceramic supports and tiles.
CERAMICS INTERNATIONAL
(2023)
Article
Construction & Building Technology
Ibrahim M. El-Kattan, Mohamed S. Saif, Mohamed O. R. El-Hariri, Ahmed H. Elgandy, Luis Perez-Villarejo, Dolores Eliche-Quesada
Summary: The impact of prepared magnesia nanoparticles (MNP) and titania nanoparticles (TNP) on the engineering properties of Alkali Activated Cements (AAC) based on granulated blast-furnace slags (GFS) was evaluated. Both MNP and TNP showed positive effects on the physicomechanical properties of AAC-GFS, such as compressive strength, flexural strength, setting times, dry shrinkage, total porosity, and flow rate. Mixes containing 3% MNP and 1% TNP exhibited the highest mechanical strengths and reduced drying shrinkage, total porosity, flow rate, and setting times compared to control samples. The formation of CSH gel and other phases contributed to the improved performance of the geopolymerization system.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Chemistry, Physical
Fatah Takabait, Sergio Martinez-Martinez, Laila Mahtout, Zahra Graba, Pedro J. Sanchez-Soto, Luis Perez-Villarejo
Summary: Calcium phosphate (CaP) with different chemical compositions and morphologies was prepared by precipitation method using L-Glutamic acid, calcium hydroxide, and phosphoric acid. The nanoscale dimensions of carbonate apatite and amorphous calcium phosphate were characterized under different concentrations of calcium hydroxide. The thermodynamic calculations showed the influence of pH on the chelate complexes and their impact on the morphology and polymorphism of CaP particles.
Article
Chemistry, Physical
Sergio Martinez-Martinez, Luis Perez-Villarejo, Dolores Eliche-Quesada, Pedro J. Sanchez-Soto
Summary: The objective of this research was to develop low-energy cement by blending different types of cement clinker using industrial waste and innovative design. Various waste materials were studied and analyzed for their characteristics. The experiment focused on the production of low-energy cement using crude blends created from industrial waste and investigated the effect of different waste types on the dicalcium silicate content.
Article
Construction & Building Technology
Boutaina Moumni, Maryam Achik, Hayat Benmoussa, Abdallah Oulmekki, Abdelhamid Touache, Noureddine El Moudden, Mohammed Charroud, Dolores Eliche-Quesada, Olga Kizinievic, Viktor Kizinievic, Antonia Infantes-Molina, Gil Gonzalez Alvaro, Francisco Guitian Rivera
Summary: The study aimed to investigate the impact of incorporating argan nut shell (ANS) and wheat straw (WS) into clay mixtures as additives on the properties of fired clay bricks. The results showed that the addition of ANS and WS reduced the bulk density and thermal conductivity of the bricks, leading to an increase in apparent porosity and water absorption. The thermal insulation property improved while the mechanical properties met the requirements, except for the bricks containing 5% of WS.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Food Science & Technology
Mjid Oukhrib, Lahcen Tamegart, Abdeslam Assafi, Lamia Hejji, Abdelmonaim Azzouz, Luis Perez Villarejo, Mohammed Haida, Chraa Mohamed, Halima Gamrani
Summary: This study investigated the effectiveness of graphene oxide nanoparticles (GONPs) as a therapeutic agent in the reserpine model of Parkinson's disease. GONPs showed neuroprotective and antioxidant effects, reversing the hypoactivity and reducing oxidative stress in the brain. These findings suggest the potential use of GONPs as an antioxidant agent in treating neurodegenerative diseases.
FOOD AND CHEMICAL TOXICOLOGY
(2023)
Editorial Material
Materials Science, Multidisciplinary
Luis Perez Villarejo, Dolores Eliche Quesada, Juan Salvador Bueno Rodriguez
Article
Chemistry, Physical
Almudena Garcia-Diaz, Salvador Bueno-Rodriguez, Luis Perez-Villarejo, Dolores Eliche-Quesada
Summary: The aim of this study is to explore the possibility of reusing ashes obtained from the calcination of industrial sludge in the oil refining industry as secondary raw materials for alkali-activated cement or geopolymers. The addition of 5-20 wt.% of residue with rice husk ash (RHA) or chamotte (CHM) was evaluated and activated with a sustainable alternative activating solution. The results indicate that the addition of ORSA improves the mechanical strength of alkaline activated cements with maximum compressive strengths of 30.6 MPa and 15.7 MPa, respectively, after 28 days of curing.
Review
Construction & Building Technology
Youssef Ettahiri, Brahim Bouargane, Kamal Fritah, Brahim Akhsassi, L. Perez-Villarejo, Ayoub Aziz, Lahcen Bouna, Abdeljalil Benlhachemi, Rui M. Novais
Summary: This review article discusses the potential of porous geopolymers in removing various contaminants from aqueous solutions, such as heavy metals, dyes, drug residues, pharmaceuticals, and pesticides. The article also provides an overview of recent preparation methods and characteristics of geopolymers. The high porosity of geopolymers allows for the adsorption of large quantities of pollutants, and they have been shown to be thermally stable. Further optimization of fabrication procedures and exploration of novel applications are recommended.
CONSTRUCTION AND BUILDING MATERIALS
(2023)