Features of accelerated carbonization of concrete based on alkaline-alkaline earth binders DOI
П. А. Федоров

Stroitel nye Materialy, Journal Year: 2024, Volume and Issue: 11, P. 40 - 47

Published: Dec. 20, 2024

Studies of the resistance concretes based on alkali-alkaline earth binders to carbonation are significant scientific and practical interest in connection with development technologies for reducing carbon footprint building materials science. These make it possible ensure disposal industrial waste construction reduce use Portland cement. The article presents results a study features accelerated concrete dust removal from mineral wool production cupola at dioxide concentration 10% vol. d. Samples water-cement ratio 0.45, 0.55, 0.60 were tested. An aqueous solution caustic soda 6 mol/l was used as an alkaline activator. It is established that rate samples has damping character expressed power function carbonization depth over time. changes compressive strength before after presented, showing increase residual due low-base binder. main product nahcolite.

Language: Английский

Corrosion resistance of polymer-modified hardened cement paste and phosphoric acid-activated metakaolin geopolymer in carbonic acid solution DOI
Chaoyang Zhang, Hongda Guo, Ligang Shi

et al.

Construction and Building Materials, Journal Year: 2024, Volume and Issue: 445, P. 137950 - 137950

Published: Aug. 22, 2024

Language: Английский

Citations

6
Ash to Asset: Evaluating the Efficacy of Reclaimed Fly Ash in Geopolymer Production DOI
Aamar Danish, Anthony Torres

Journal of Cleaner Production, Journal Year: 2025, Volume and Issue: unknown, P. 145326 - 145326

Published: March 1, 2025

Language: Английский

Citations

0
Evaluation of the workability, mechanical strength, leaching toxicity and durability of sulfate solid waste composite cementitious materials DOI
Liang Tang,

Zhou Yu,

Zhaoyi He

et al.

Sustainable Chemistry and Pharmacy, Journal Year: 2024, Volume and Issue: 42, P. 101847 - 101847

Published: Nov. 19, 2024

Language: Английский

Citations

3
The effects of calcium carbonate on sodium metasilicate-activated metakaolin-based geopolymer pastes DOI
Jie Ren, B. Cansu Acarturk, Nicolas Dowdy

et al.

Construction and Building Materials, Journal Year: 2024, Volume and Issue: 448, P. 138218 - 138218

Published: Sept. 7, 2024

Language: Английский

Citations

1
SYNTHESES AND CHARACTERISTICS OF CALCIUM-BASED GEOPOLYMER FROM SOLAR-CELL PANEL-GLASS WASTE BY HYDROTHERMAL METHOD DOI Creative Commons
Hoc Thang Nguyen, Quang Binh Nguyen,

Văn Phúc Nguyễn

et al.

Materiali in tehnologije, Journal Year: 2024, Volume and Issue: 58(4)

Published: Aug. 19, 2024

A calcium-based geopolymer was synthesized using a blend of recycled glass powder from solar panels (PV waste), limestone, and sodium silicate solution, which underwent hydrothermal autoclaving at 180 °C for varying durations. This material is regarded as environmentally friendly has garnered research attention worldwide. In this investigation, limestone served the calcium source, while provided SiO2 necessary producing materials. Currently, solar-panel waste poses significant environmental challenge that requires attention. The objective to develop sustainable high-performance materials, specifically limestone. study aimed evaluate effects on compressive strength, volume weight, porosity, water absorption geopolymer, well understand microstructural transformations involved. results revealed remarkable 430 % increase in strength specimens following 24 96 hours compared unautoclaved samples. Concurrently, volumetric weight had substantial rise 1.54 2.31 g/cm3, with corresponding decreases porosity 38.1 16.9 10.26 5.08 %, respectively. An X-ray diffraction (XRD) analysis mineral composition scanning electron microscope (SEM) examination microstructure demonstrated transformation all samples an amorphous gel structure needle- or spike-shaped fibrous, then sheet-like CSH structures. These new structures exhibited dimensions less than 10 µm length, 2 width, 400 nm thickness. resulting products constitute hydrate minerals, characteristic are synthetic arising chemical reactions among SiO2, CaO, H2O under conditions. underscores potential materials produced high-strength geopolymers, offering promising solution waste.

Language: Английский

Citations

1
Environmental geopolymer microsphere composite catalysts as highly efficient activators of peroxymonosulfate (PMS) for the degradation of Rhodamine B DOI
Yutong Yang,

Wenkang Qi,

Yuanyuan Xie

et al.

Journal of Materials Science, Journal Year: 2024, Volume and Issue: 59(44), P. 20575 - 20592

Published: Nov. 1, 2024

Language: Английский

Citations

1
Machine Learning to Predict Workability and Compressive Strength of Low- and High-Calcium Fly Ash–Based Geopolymers DOI Creative Commons
Andrie Harmaji,

Mira Chandra Kirana,

Reza Jafari

et al.

Crystals, Journal Year: 2024, Volume and Issue: 14(10), P. 830 - 830

Published: Sept. 24, 2024

The potential substitution of Portland cement–based concrete with low- and high-calcium fly ash–based geopolymers was investigated. However, predicting the workability compressive strength desired physical mechanical properties is a complicated process because variety chemical compositions found in aluminosilicate sources. Therefore, machine-learning techniques were used to predict eliminate usual trial-and-error laboratory procedures. experimental predicted results geopolymer using multilayer perceptron regressor, voting XGBoost compared. model outperformed other models terms accuracy for strength, producing R2 0.96 0.89, respectively. Sensitivity analysis determined that percentage CaO had largest effect on 27.13%. Fly ash content 34.44%. Our approach offers straightforward dependable strategy designing optimizing geopolymers.

Language: Английский

Citations

0
Mechanical Properties of Natural Jute Fiber-Reinforced Geopolymer Concrete: Effects of Various Lengths and Volume Fractions DOI Open Access

Abdulrhman Dhaif Allah Abdo Mohammed,

Ronghui Wang, Ghasan Fahim Huseien

et al.

Journal of Composites Science, Journal Year: 2024, Volume and Issue: 8(11), P. 450 - 450

Published: Nov. 1, 2024

Enhancing the fracture strength and ductility of concrete through incorporation various types synthetic natural fibers with varying textures contents remains challenging. Natural fibers, being versatile eco-friendly construction materials, can be an excellent alternative to fibers. However, studies on fiber-reinforced (especially jute fibers) novel composites like geopolymer binders remain deficient. Thus, effects lengths (15, 25 35 mm) volume (0.10, 0.20, 0.30, 0.40, 0.50, 0.60, 0.70%) mechanical performance were studied. The results revealed that fiber reinforcement remarkably affected workability, compressive strength, strengths, water absorption microstructure properties proposed concretes. Increasing length fractions in matrix lowered slump values workability increased strength. specimen prepared a mm 0.70% displayed lowest value (28 highest (31.5 MPa) at 28 days. In addition, specimens made 0.10, 0.40% showed significant improvement splitting tensile flexural strengths. increasing up 0.50% led slight drop geopolymers. achieved enhancement (18.7%) (29.1%) short, sustainable high obtained by incorporating leading practical applications sector. green may enable reduction solid waste, thus promoting more industry.

Language: Английский

Citations

0
Features of accelerated carbonization of concrete based on alkaline-alkaline earth binders DOI
П. А. Федоров

Stroitel nye Materialy, Journal Year: 2024, Volume and Issue: 11, P. 40 - 47

Published: Dec. 20, 2024

Studies of the resistance concretes based on alkali-alkaline earth binders to carbonation are significant scientific and practical interest in connection with development technologies for reducing carbon footprint building materials science. These make it possible ensure disposal industrial waste construction reduce use Portland cement. The article presents results a study features accelerated concrete dust removal from mineral wool production cupola at dioxide concentration 10% vol. d. Samples water-cement ratio 0.45, 0.55, 0.60 were tested. An aqueous solution caustic soda 6 mol/l was used as an alkaline activator. It is established that rate samples has damping character expressed power function carbonization depth over time. changes compressive strength before after presented, showing increase residual due low-base binder. main product nahcolite.

Language: Английский

Citations

0