Journal of Sustainable Cement-Based Materials, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 18
Published: Sept. 18, 2024
Language: Английский
Sustainability, Journal Year: 2025, Volume and Issue: 17(5), P. 2077 - 2077
Published: Feb. 27, 2025
Noise level and atmospheric pollutants such as particulate matter (PM) combustion gases depend on car traffic. A highly circulated area in Cluj-Napoca City (Romania) was investigated based sustainable principles. The noise at the source about 77 dB due to intense traffic of 214 units/10 min including cars, buses, trucks pedestrians. It decreased slowly 62 proximity first wall from roadside (20 m distance) significantly 50 beyond buildings near road (135 source). correlated with a high pollutant emission source: 25 µg/m3 (PM2.5), 45 (PM10) 1.023 (total volatile organic compounds (TVOCs)). PM10 38 µg/m3, while PM2.5 remained 22 TVOC slightly 0.974 distance 10 road. levels 5 18 (PM2.5) 135 road, also 0.705 µg/m3. PM crystalline structure by XRD coupled mineralogical microscopy. Microstructure elemental composition were assessed via high-resolution SEM EDS spectroscopy. found that dominated finest clay fraction (e.g., kaolinite muscovite), quartz calcite. large amount adsorbed onto particles FTIR correlation between emissions sound intensity indicates extended for long time facilitates ultra-structural sustentation into atmosphere. number nanoparticles (kaolinite 40 nm muscovite 60 nm) detected AFM samples collected source, becoming sparser source.
Language: Английский
Citations
1
Optical Materials, Journal Year: 2025, Volume and Issue: unknown, P. 116936 - 116936
Published: March 1, 2025
Language: Английский
Citations
1
Sustainability, Journal Year: 2025, Volume and Issue: 17(7), P. 2906 - 2906
Published: March 25, 2025
Transport and vehicle traffic are closely connected with particulate matter (PM) pollution, inducing various fractions into the atmosphere, some of them forming significant deposits on surface car. They washed away during carwash-inducing slurries collecting PM deposits, which characteristic a large area. Crystalline was investigated by XRD coupled polarized optical microscopy (POM). Organic matters were Fourier-Transform Infrared spectrometry (FTIR) gas chromatography, GC-MS. Their microstructure elemental composition SEM-EDX. The crystalline features contain mainly quartz, calcite, clay (muscovite kaolinite) particles having traces goethite lepidocrocite. Slurry particle size distribution established sieving following meshes: 63 µm, 125 250 500 1000 2000 4000 µm. Coarse 250–4000 μm dominated quartz calcite particles. amount decreases size, while muscovite kaolinite increases in finest 0–125 μm. evidenced, firstly, FTIR spectroscopy, revealing mostly CH2; C=O, NH4 bonds that more intense for fine fractions. organic form amorphous crusts associated micro- nano-plastic related to phthalates washing detergents. Atomic Force Microscopy revealed their range between 60 90 nm evidenced nanoparticles within samples. nanofractions adhere bigger humid environments, assuring immobilization reduce hazardous potential. Carwash slurry blending fertile soil ensures proper grass seed germination growth at mixtures up 60% slurry, allowing its sustainable reconversion as landfill dump rehabilitation, preventing emission hazard. Blended compositions containing than have noxious effects seeds, inhibiting germination.
Language: Английский
Citations
1
Journal of Composites Science, Journal Year: 2024, Volume and Issue: 8(6), P. 219 - 219
Published: June 9, 2024
Kaolinite is able to assure the high binding affinity of filler particles raw ceramic bodies. It acts as a matrix that strongly holds other constituents’ in compact structure. The slurry samples were characterized by XRD, mineralogical microscopy and SEM coupled with an EDX elemental analysis. collected from tile production wastewaters had significant amount kaolinite (36%), mostly fine 3 µm, less surrounding quartz (37%) mullite (19%) 5–100 µm diameter traces lepidocrocite (8%). dense paste relative moisture 25%. square bar received, pressed at load 350 N, flexural strength 0.61 MPa. Increasing 33% using regular water, followed mechanical attrition 2000 rpm for 5 min, resulted porous 0.09 MPa; increasing speed 6000 rpm, microstructural homogenization was improved about 0.68 seems water does not optimal conditioning. Therefore, we used technological pH = 10, N 1.17 results demonstrate moistened regime assured proper conditioning matrix, achieving under pressing load. Bars mixture several loads, including 70, 140, 210 progressively increased 0.56 MPa fractography atomic force (AFM) revealed facilitated particle disposal regarding particles, progressive strong finest platelets onto their surface.
Language: Английский
Citations
6
Journal of Composites Science, Journal Year: 2024, Volume and Issue: 8(12), P. 542 - 542
Published: Dec. 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.
Language: Английский
Citations
4
Materials, Journal Year: 2025, Volume and Issue: 18(8), P. 1715 - 1715
Published: April 9, 2025
The slurry collected from the waste water resulting ceramic tile processing contains significant amounts of quartz, kaolinite, and mullite, along with traces iron hydroxides as observed using XRD analysis coupled mineralogical optical microscopy (MOM). Such an admixture would be ideal for development ecologic building materials. Microstructural conditioning enhances binding properties kaolinite. Therefore, influence vibration compaction moistened at 30% humidity on compressive strength was assessed. unvibrated sample is about 0.8 MPa failure promoted by microstructural unevenness. Several amplitudes were tested 20 to 40 mm. optimal mode obtained amplitude 25 mm 10 min, ensuring a 2.37 smooth uniform surface involved within layer SEM microscopy. samples prepared under conditions thermally consolidated 700, 800, 900 °C below mullitization temperature ensure low carbon footprint. results reveal kaolinite dehydration in all fired samples, inducing its densification, which increases increasing heating temperature. EDS elemental investigations that dehydrated better embeds quartz mullite particles, compact microstructure. firing particles induce partial matrix, their homogeneity. compression dependent: 4.44 700 °C; 5.88 800 °C, 16.87 °C. fractography shows occurs due matrix cracks particles. rather plastic temperatures becomes brittle Reducing treatment time reduces footprint parts. Samples exhibit comparable quality bricks, those regular superior high-quality bricks.
Language: Английский
Citations
0
Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 180703 - 180703
Published: April 1, 2025
Language: Английский
Citations
0
Materials, Journal Year: 2024, Volume and Issue: 17(21), P. 5164 - 5164
Published: Oct. 23, 2024
The recent COVID-19 emergency has led to an impressive increase in the production of pharmaceutical vials. This a parallel amounts waste glass; manufacturers typically recover material from faulty containers by crushing, giving origin unrecyclable fraction. Coarse fragments are effectively reused as feedstock for glass melting; on contrary, fine powders (<100 microns), contaminated metal and ceramic particles due same crushing operations, landfilled. Landfilling is also suggested after medical use. study aims at proposing new opportunities recycling particles, according findings concerning alkali activation glass, combined with novel processing, i.e., binder jetting printing. It already been shown that immersed low-molarity alkaline solution (not exceeding 2.5 M NaOH), undergoes surface dissolution hydration; cold consolidation later achieved, upon drying 40-60 °C, condensation reaction occurring hydrated layers adjacent particles. Binder printing does not realize full liquid immersion powders, attacking selectively sprayed powder bed. Here, we discuss tuning key parameters, such molarity (from 10 M) granulometry obtain stable printed blocks. In particular, stability depends formation bridges between consisting strong T-O bonds (Si-O-Si, Al-O-Si, B-O-Si), while degradation products (concentrating Na ions) remain secondary phase, solubilized boiling water. Such achieved operating 5 NaOH.
Language: Английский
Citations
2
Applied Earth Science Transactions of the Institutions of Mining and Metallurgy, Journal Year: 2024, Volume and Issue: 133(4), P. 224 - 239
Published: Dec. 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.
Language: Английский
Citations
2
Materials, Journal Year: 2024, Volume and Issue: 17(20), P. 5122 - 5122
Published: Oct. 21, 2024
The current framework for managing construction waste, guided by European Union regulations, calls an integrated waste management system. However, the reuse of old plaster particularly from deteriorated facades, remains underexplored. This study investigates potential repurposing as a substitute aggregates and cement in mortars, with aim promoting environmental sustainability resource efficiency. Three mortar mixes were analyzed: control mix, mix 45% replacing aggregates, 10% cement. Results show that led to 30% reduction flexural strength, while replacement increased strength 6%. Compressive dropped 27% 38% aggregate replacements, respectively. Despite these reductions, remained within acceptable limits structural integrity. Further microscopic analysis revealed incomplete integration portlandite particles contributed non-uniform bonding crystal formation, weakening mortar's structure. research demonstrates feasibility reusing offering novel approach reducing circular economy. It contributes filling knowledge gap on mortars aligning sustainable goals.
Language: Английский
Citations
1