Results 81 to 90 of about 33,643 (230)

3D‐Printed Geopolymer as a Basic Heterogeneous Catalyst for the Synthesis of α‐Cyanoacrylates Through the Knoevenagel Condensation

open access: yesEuropean Journal of Organic Chemistry, Volume 29, Issue 16, 25 April 2026.
3D‐printed geopolymers are presented as efficient and reusable heterogeneous catalysts for the Knoevenagel condensation. Under mild and green conditions, they promote the high‐yield synthesis of diverse α‐cyanoacrylates with remarkable stability and scalability.
Francesca T. Albino   +5 more
wiley   +1 more source

Porous glass-ceramics from alkali activation and sinter-crystallization of mixtures of waste glass and residues from plasma processing of municipal solid waste [PDF]

open access: yes, 2018
Alkali-activated aqueous slurries of fine glass powders, mostly deriving from the plasma processing of municipal solid waste ('Plasmastone'), were found to undergo progressive hardening at low temperature (75 degrees C) owing to the formation of C-S-H ...
Bernardo, Enrico   +3 more
core   +3 more sources

Unburned Carbon in Coal Fly Ash: Exploring Its Potential for Electrochemical Energy Storage in Supercapacitors

open access: yesAdvanced Energy and Sustainability Research, Volume 7, Issue 4, April 2026.
The graphical abstract illustrates a circular waste to value pathway in which coal fly ash is upgraded by isolating unburned carbon and converting it into functional carbon materials. Through carbonization and activation, UC‐derived carbon is transformed into high surface area electrodes for supercapacitors, supporting sustainable energy storage and ...
Thapelo Manyepedza, Moses T. Kabomo
wiley   +1 more source

The effect of water binder ratio on strength development of class C fly ash geopolymer mortar prepared by dry geopolymer powder

open access: yesMATEC Web of Conferences, 2019
The use of geopolymer binder as cement replacement material can reduce the amount of carbon dioxide gas produced during the Portland Cement manufacturing process.
Wardhono Arie
doaj   +1 more source

Alkali-Silica Reaction Resistance and Pore Solution Composition of Low-Calcium Fly Ash-Based Geopolymer Concrete

open access: yesInfrastructures, 2020
Low-calcium fly ash-based geopolymer concrete is generally reported to be less vulnerable to alkali-silica reaction (ASR) than conventional ordinary Portland cement concrete.
Jiawei Lei, Jiajun Fu, En-Hua Yang
doaj   +1 more source

Innovative Application of SRG for Strengthening Continuous RC Beams

open access: yesEngineering Reports, Volume 8, Issue 4, April 2026.
Steel‐reinforced grout (SRG) effectively strengthens continuous reinforced concrete beams, enhancing flexural capacity by up to 81%. Using geopolymer mortar promotes sustainability while steel fabrics outperform carbon, glass, and PBO alternatives. Low‐density SRG provides superior bonding and structural efficiency, offering a practical solution for ...
Mohamed Ibrahim, Usama Ebead
wiley   +1 more source

Development of durable “green” concrete exposed to deicing chemicals via synergistic use of locally available recycled materials and multi-scale modifiers [PDF]

open access: yes, 2018
From the economic and social perspectives, the use of waste materials would not be attractive until their costs and quality can satisfy the construction requirements.
Cui, Na, Xie, Ning
core  

Sustainable High‐Performance Green Concrete Utilizing Untreated Spent Foundry Sand: Microstructural Analysis, Mechanical Properties, and Durability

open access: yesEngineering Reports, Volume 8, Issue 4, April 2026.
This study demonstrates the successful incorporation of Spent Foundry Sand (SFS) as a sustainable alternative to natural sand in concrete, enhancing compressive and tensile strengths by up to 26% and 12.87%, respectively, while reducing chloride permeability.
Yiren Wang, Lian Ju, Yibo Wang, Wei Liu
wiley   +1 more source

The structure of geopolymers – Theoretical studies

open access: yesJournal of Molecular Structure, 2018
Abstract This work presents the results of DFT and classical mechanics' calculations and theoretical analysis of geopolymer structure. The calculations were carried out using a bottom-up approach (from small oligomers to clusters with increasing size) for various Si:Al ratio.
Andrzej Koleżyński   +2 more
openaire   +2 more sources

Microstructure and Performance Optimization of Barley Husk Ash–Blended Mortars: A Sustainable Approach to Cement Substitution

open access: yesEngineering Reports, Volume 8, Issue 4, April 2026.
Barley husk ash (BHA), an agricultural byproduct rich in pozzolanic oxides, was optimized as a sustainable cement substitute. Statistical modeling and experimental validation confirmed 22.75% BHA as the optimal replacement, enhancing mechanical and durability performance while advancing eco‐efficient construction practices.
Behailu Zerihun Hailemariam   +3 more
wiley   +1 more source

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