Results 41 to 50 of about 4,357,340 (293)

Alkali activation as new option for gold mine tailings inertization

Journal of Cleaner Production, 2018
The mining industry produces a huge quantity of sulphidic mine tailings, which cause several short- and long-term environmental problems when disposed by landfilling in impounding lakes. The possibility of immobilizing several heavy metals from gold mine
Jenni Kiventerä, I. Lancellotti, M. Catauro, Francesco Dal Poggetto, C. Leonelli, M. Illikainen   +5 more
semanticscholar   +1 more source

Geopolymer Cement Based on Alkali Activated SlagGeopolymer Cement Based on Alkali Activated Slag

, 2021
The aim of this investigation is to prepare geopolymer cement by mixing various amounts of granulated blast furnace slag (GBFS) with Fly ash (FA) and cement kiln dust (CKD). Seven blends are prepared using 100 % slag , 95% slag+5% CKD or fly ash , 90% slag + 10% CKD or Fly ash and 85% slag + 15% CKD or Fly ash .
Nabil, Nourhan, Ahmed,, Doaa abdel monem, Kishar,, Essam abdel   +2 more
openaire   +1 more source

Mineral Waste Into Alkali-Activated Pavements

7th International Conference on Technologies & Business Models for Circular Economy
The study highlights the pressing need to recycle mineral waste to mitigate resource depletion and environmental damage. It focuses on creating sustainable pavement slabs through alkali activation, using a variety of waste materials such as bio-ash, local slags and mineral wool.
Pavlin, Majda, Zupančič, Kaja, Sešek Pavlin, Alenka   +2 more
openaire   +3 more sources

An experimental study on the mix design optimization of fly ash-based geopolymers [PDF]

Chemical Industry and Chemical Engineering Quarterly, 2019
Geopolymers are materials suitable for utilization in the construction industry due to their superior properties, such as high strength and good durability. The properties of geopolymers can be configured due to mix design and synthesis conditions.
Arioz Evren, Arioz Omer, Kockar Mete O.
doaj   +1 more source

Evaluation of different fly ash samples on the production of alkali-activated materials

Revista IBRACON de Estruturas e Materiais, 2021
: In this work, different samples of fly ash (FA-A and FA-B) classified as type F as used to produce the AAM samples. The FA-A presented a higher Fe2O3 content than FA-B, 6.1 to 3.8 wt.%, and a slightly higher SiO2/Al2O3 ratio of 3.52 in comparison to 3 ...
Adriano Galvão Souza Azevedo, Luis Fernando Tonholo Domingos, Kurt Strecker   +2 more
doaj   +1 more source

Ferroelectricity in Antiferromagnetic Wurtzite Nitrides

Advanced Functional Materials, EarlyView.
We establish MnSiN2${\rm MnSiN}_2$ and MnGeN2${\rm MnGeN}_2$ as aristotypes of a new multiferroic wurtzite family that simultaneously exhibits ferroelectricity and antiferromagnetism with altermagnetic spin splitting. By strategically substituting alkaline‐earth metals, we predict new materials with coexisting switchable polarization, spin texture, and
Steven M. Baksa, Lin‐Ding Yuan, Stephen D. Wilson, James M. Rondinelli   +3 more
wiley   +1 more source

Electrospun Wood‐Derived Biopolymers as Electrodes in Electrochemical Energy Storage Technologies

Advanced Functional Materials, EarlyView.
Electrospinning transforms wood‐derived cellulose and lignin into architecturally defined, binder‐free carbon electrodes with tuneable porosity and functionality. This review shows how fibre design enables decoupled charge and mass transport, enhancing performance across battery systems, while identifying key challenges in spinnability, scalability ...
Michael W. Thielke, Hattie R. Chisnall, Jesus Vazquez Chavez, Ana B. Jorge Sobrido   +3 more
wiley   +1 more source

A Comparative Evaluation of Three Valorisation Pathways for Waste Electric Arc Furnace Slag to Improve Its Use as an Eco-Logical Binder

Recycling
The urgent need to reduce greenhouse gas emissions and enhance resource circularity is driving the cement and construction industry to explore alternatives to clinker-based binders.
Bruno Machini, Diogo Simões, Pedro Humbert, Julieta António, João Almeida   +4 more
doaj   +1 more source

Phase formation behaviour in alkali activation of clay mixtures

Applied Clay Science, 2019
Alkali-activated soils have potential as low carbon, low cost construction materials. There is a lack of fundamental understanding around how soil composition influences alkali activation behaviour, especially for uncalcined soils. The types and relative
A. Marsh, Andrew Heath, Pascaline Patureau, M. Evernden, Peter Walker   +4 more
semanticscholar   +1 more source

Operando cathode activation with alkali metal cations for high current density operation of water-fed zero-gap carbon dioxide electrolyzers

Nature Energy, 2021
Continuous-flow electrolysers allow CO2 reduction at industrially relevant rates, but long-term operation is still challenging. One reason for this is the formation of precipitates in the porous cathode from the alkaline electrolyte and the CO2 feed ...
B. Endrődi, A. Samu, E. Kecsenovity, T. Halmágyi, D. Sebők, C. Janáky   +5 more
semanticscholar   +1 more source