Evolution of morphology, structure and magnetic behavior of CdxZn1-xFe2O4@SiO2 nanocomposites with Cd2+ content and heat treatment

Optical Materials, Год журнала: 2025, Номер unknown, С. 116936 - 116936

Опубликована: Март 1, 2025

Язык: Английский

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Natural Fiber Reinforcement of Ceramic Slurry Compacts

Journal of Composites Science, Год журнала: 2024, Номер 8(12), С. 542 - 542

Опубликована: Дек. 20, 2024

Background: ceramic tile wastewater slurry contains a large amount of fine kaolinite particles acting as matrix for mineral filler quartz and mullite. Reinforcing it with natural fibers increases its compression strength. A novel approach is using Stipa pennata because their local availability, good mechanical properties, feathery aspect, making them able to reinforce compacts. Preparation investigation methods: Slurry conditioned at 33% humidity milled 6000 rpm 5 min 39% quartz, 37% kaolinite, 16% mullite 8% lepidocrocite (observed via XRD correlated mineralogical microscopy). Kaolinite ensure optimal binding the into dense composite structure, observed SEM. EDS maps reveal increase in C content, along being associated significant levels Al Si, indicating microstructural compactness reinforcement layer. An additional compaction load enhances cohesion. Results: The sample without has compressive strength 1.29 MPa. This 2.89 MPa by adding median reinforcing layer reaches 3.13 20 N. crossed fiber-reinforcing combined N ensures 4.78 Introducing two layers oriented perpendicular one another 2.48 Lateral placement regarding plan causes slight decrease SEM fractography reveals that feather-like structure fiber acts an anchor site samples, slowing crack initiation under efforts, creating compared lateral flakes. Conclusions: place sample, interlaced best resistance. Ceramic reinforced useful intermediary on modular walls ecologic buildings.

Язык: Английский

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Mechanism Study on the Influence of Clay-Type Lithium Slag on the Properties of Cement-Based Materials

Materials, Год журнала: 2025, Номер 18(8), С. 1788 - 1788

Опубликована: Апрель 14, 2025

With the increasing demand for lithium resources and enhancement of global environmental awareness, how to efficiently environmentally develop clay-type is great strategic significance future development. Clay-type slag (LS) a byproduct resulting from extraction ores. Its primary chemical constituents include SiO2 Al2O3, it exhibits potential pozzolanic properties. ore low grade, so large amount LS produced during its production. In this study, calcined LS, limestone powder (LP), cement clinker were used as main raw materials prepare low-carbon LC3 cementitious materials. The study focused on effect LP new mixing properties, mechanical hydration kinetics, microstructure formation transformation findings revealed that incorporating significantly raised standard consistency water reduced setting time binding material. While initially weakened performance mortar, enhanced these properties in later stages. compressive strength LC-10 LC-20 at 180 days exceeded reference by 3.7% 1.1%, respectively. addition, number micropores between 3 20 nm increased significantly. It showed addition could optimize pore structure some extent. According research, optimal content should not exceed 30%. This method only consumes solid waste but also facilitates green industry.

Язык: Английский

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Elemental Design of Alkali-Activated Materials with Solid Wastes Using Machine Learning

Materials, Год журнала: 2024, Номер 17(18), С. 4573 - 4573

Опубликована: Сен. 18, 2024

Understanding the strength development of alkali-activated materials (AAMs) with fly ash (FA) and granulated blast furnace slag (GBFS) is crucial for designing high-performance AAMs. This study investigates mechanism AAMs using machine learning. A total 616 uniaxial compressive (UCS) data points from FA-GBFS-based AAM mixtures were collected published literature to train four tree-based learning models. Among these models, Gradient Boosting Regression (GBR) demonstrated highest prediction accuracy, a correlation coefficient (R-value) 0.970 root mean square error (RMSE) 4.110 MPa on test dataset. The SHapley Additive exPlanations (SHAP) analysis revealed that water content most influential variable in development, followed by curing periods. recommends calcium-to-silicon ratio around 1.3, sodium-to-aluminum slightly below 1, silicon-to-aluminum above 3 optimal performance. proposed design model was validated through laboratory experiments mixtures, confirming model’s reliability. research provides novel insights into offers practical guide elemental design, potentially leading more sustainable construction materials.

Язык: Английский

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Physicochemical characterisation and industrial application of new kaolin deposit in Sela Dingay Area, Central Ethiopia

Applied Earth Science Transactions of the Institutions of Mining and Metallurgy, Год журнала: 2024, Номер 133(4), С. 224 - 239

Опубликована: Дек. 1, 2024

Sela Dingay kaolin deposit is a primary formed mainly through the weathering of rhyolitic ignimbrite. Integrated analyses geological, mineralogical, geochemical and physical properties were conducted to characterise industrial applications kaolin. X-ray diffraction (XRD) attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR) used raw samples. The results show that composed kaolinite (66–93%) quartz (9–34%). higher chemical index alteration (CIA = 94.2%) (CIW 96.8%) values suggest was by intense under oxidising conditions. consists high percentage clay/silt-sized particles, low shrinkage value (1.1–3.4%), medium-high plastic limit (25–35%), with specific gravity pH ranging between 2.47 2.56 g/cm 3 6.3 7.2, respectively. overall medium grade it can be for various appropriate beneficiation processes remove amounts Fe 2 O quartz. Therefore, newly discovered (estimated at 5,136,166 tonnes) in area potential target future exploitation.

Язык: Английский

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Prediction and investigation of water repeated absorption and release properties of superabsorbent polymers during the dry-wet cycles in different solutions

Journal of Sustainable Cement-Based Materials, Год журнала: 2024, Номер unknown, С. 1 - 18

Опубликована: Сен. 18, 2024

Язык: Английский

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