Article
Construction & Building Technology
Cyriaque Rodrigue Kaze, Adeyemi Adesina, Gisele Laure Lecomte-Nana, Jordan Valdes Sontia Metekong, Liliane Van Essa Kamga Samen, Elie Kamseu, Uphie Chinje Melo
Summary: Geopolymers were developed using laterite soil and rice husk ash as materials, with the effects of RHA, quartz sand, and curing temperature on the properties of geopolymers investigated. The study demonstrated that incorporating RHA and quartz sand improved the performance of geopolymers, and higher curing temperature was beneficial only for geopolymers containing RHA.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Chemistry, Physical
Jiaqiang Jing, Shijian Zhang, Min Qin, Wen Zhang, Yuting Shan, Yuanzhao Cheng
Summary: Through a combination of experiments and theories, this study identified the main mechanism by which sand promotes demulsification of heavy oil emulsions, including the preferential wetting of sand particles by water, causing water droplets to encapsulate the sand particles and accelerate the settling speed of the water droplets.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Construction & Building Technology
Qiang Su, Jinming Xu
Summary: The use of glass sand and rice husk ash in concrete production saves natural sand resources and promotes waste recycling. The pozzolanic effect of rice husk ash reduces the alkali-silica reaction caused by glass sand and cement slurry. The addition of glass sand improves tensile strength and cyclic compression performance, while rice husk ash enhances compressive and splitting tensile strength.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Oluwatosin Abiodun Balogun, Abayomi Adewale Akinwande, Adeolu Adesoji Adediran, Peter Pelumi Ikubanni, Samuel Akinyemi Shittu, Olanrewaju Seun Adesina
Summary: This study investigated the effects of fine sand addition on fired clay bricks. Results showed that increasing sand content led to reduced porosity, water absorption, weight loss, and firing shrinkage, while increasing thermal conductivity and thermal emissivity. The study also found that immersion in rainwater led to a decline in hardness, impact resistance, and compressive and flexural strengths over time.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2021)
Article
Geology
M. Julleh Jalalur Rahman, M. Pownceby, Md Sohel Rana
Summary: The sands of the Meghna River are primarily composed of light minerals quartz and feldspar, with heavy minerals such as amphibole, epidote, and garnet making up a small percentage. Iron-titanium oxide minerals like ilmenite and magnetite are also present in the sands. EPMA analysis indicates that the garnet and ilmenite in the sands have good potential for commercial extraction.
ORE GEOLOGY REVIEWS
(2022)
Article
Materials Science, Textiles
Gabriel Furtos, Laura Silaghi-Dumitrescu, Petru Pascuta, Codruta Sarosi, Kinga Korniejenko
Summary: Fly ash-based geopolymer composites, mixed with wood fiber and sand, have been shown to have comparable properties to ordinary Portland cement but with lower CO2 emissions. The addition of wood fiber was found to decrease the mechanical properties of the composites, suggesting that a limit of 15 wt.% wood fiber may be ideal for construction applications.
JOURNAL OF NATURAL FIBERS
(2021)
Review
Environmental Sciences
Ting Wang, Weiyuan Cao, Yingqi Wang, Chao Qu, Yufeng Xu, Haixiang Li
Summary: This review provides a comprehensive analysis of surface modification strategies for quartz sand and its mechanism of adsorbing heavy metal ions (HMIs). Surface modification of quartz sand proves effective in addressing its limited adsorption capacity, rapid saturation, and smooth surface. However, further investigations are needed on particle size, regenerative capabilities, and application costs.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2023)
Article
Construction & Building Technology
Ouiame Chakkor, Mehmet Fatih Altan
Summary: Geopolymer is an environmentally-friendly alternative to Portland Cement, which helps to reduce CO2 emissions. The use of different binders, such as bentonite and zeolite, in geopolymer manufacturing has been studied, and the substitution of river sand for metakaolin has also been investigated. The results showed that metazeolite had better performance due to its higher Si/Al ratio and more stable structure. The use of metakaolin improved the pozzolanic characteristic and enhanced the findings. Overall, the geopolymer samples showed resistance to durability effects, with the sample 50MZ50MB25MK yielding the best result.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Biotechnology & Applied Microbiology
Stuart Cairns, Sampriti Chaudhuri, Gabriel Sigmund, Iain Robertson, Natasha Hawkins, Tom Dunlop, Thilo Hofmann
Summary: This study shows that amending biochar with wood ash significantly enhances the immobilization of Pb, Cu, Zn, and Cd by an order of magnitude. The addition of wood ash increases pH and causes precipitation of minerals, leading to dominant mechanisms of metal immobilization through precipitation and ion exchange. Wood ash amended biochar proves to be a sustainable and cost-effective option for removing heavy metals from motorway runoff.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Geochemistry & Geophysics
Weili Bi, Chaolu Yi, Haijun Yang, Xiangke Xu, Gang Hu
Summary: Quartz is crucial for ESR dating, but impurities in quartz grains can impact the ESR signals and lead to inaccurate age measurements. Our study shows that highly pure quartz is necessary for reliable ESR dating results.
Article
Construction & Building Technology
Zhiming Shi, Chao Han, Wenbin Wang
Summary: Low-cost desert sand and coal fly ash were used to synthesize high-quality quartz-anorthite composite ceramics. The addition of fly ash affected the densification, phase transformation, microstructure, and mechanical and thermal properties of the ceramics. The results showed that anorthite was formed by the solid-state reaction of quartz, mullite, and other phases in the desert sand and fly ash, promoted by liquid-phase sintering at higher temperatures. The technique has potential applications in civil engineering materials.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2023)
Article
Chemistry, Physical
Sanja Dimter, Martina Zagvozda, Tea Tonc, Miroslav Simun
Summary: The article describes the laboratory evaluation of sand mixtures modified with wood fly ash and stabilized with different amounts of cement. The test results show that wood fly ash has a considerable stabilization effect on the sand mixture and improves its load bearing capacity. By adding a small quantity of cement, the strength and resistance to freezing of the stabilized mixture are enhanced. The results indicate that by replacing part of the sand with wood fly ash, higher strengths can be achieved with reduced cement content.
Article
Environmental Sciences
Yongya Wang, Xinyi Huang, Wei Wang, Tao Wu
Summary: This study investigates the factors influencing the leaching toxicity of heavy metals in glass ceramics made from MSWI fly ash and andesite tailings. The results show that the content and distribution state of the heavy metals greatly affect their leaching toxicity in the glass ceramics.
Article
Anthropology
Katerina Tomkova, Natalie Venclova, Sarka Krizova, Nadine Schibille, Veronika Faltusova, Tomas Vaculovic, David Danecek
Summary: The Hostivice cemeteries spanning from the fourth century to the tenth century provide a window to study the development of glass beads from Late Roman period to Early Middle Ages. Chemical analyses revealed the transition from natron to plant ash glass in central Europe during the eighth-ninth centuries. The study also identified the distribution of natron glass beads in the ninth-tenth centuries alongside new types of beads made from this material.
ARCHAEOLOGICAL AND ANTHROPOLOGICAL SCIENCES
(2023)
Article
Spectroscopy
Zdenka Cermakova, David Hradil, Petr Bezdicka, Janka Hradilova, Karolina Panova
Summary: This study examines a wood ash glass tessera in detail, which was part of a statue in Poland created in the 14th century and destroyed during World War Two. The analysis reveals that the tessera was colored by cobalt, possibly influenced by copper, and opacified by Ca-phosphate. It also identifies two new phases, indicating the originality of the tessera and a higher production temperature.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)