Results 61 to 70 of about 17,046 (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

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

Compressive Strength of Geopolymer Based on the Fly Ash Variation [PDF]

open access: yes, 2015
This study was conducted to determine the factors that may affect the compressive strength of fly ash-based geopolymer. With so many kinds of fly ash available and has its different characteristics, it would be very influential on geopolymer produced ...
Antoni,   +2 more
core  

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

Pengaruh Kadar Air Dan Superplasticizer Pada Kekuatan Dan Kelecakan Beton Geopolimer Memadat Sendiri Berbasis Abu Terbang [PDF]

open access: yes, 2016
Eenvironmental issues that caused by the production of portland cement and the development needs of the concrete casting technology, where in the last few decade scientists has started to do research and development of fly ash based - self compacting ...
Gumalang, S. (Stevanny)   +2 more
core  

The Effect of Different Ratio Bottom Ash and Fly Ash Geopolymer Brick on Mechanical Properties for Non-loading Application

open access: yesMATEC Web of Conferences, 2017
This paper studies the finding of strength and water absorption of geopolymer bricks using bottom ash and fly ash as a geopolymer raw material for non-loading application with minimum strength.
Mardiah Deraman Laila   +5 more
doaj   +1 more source

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

Durabilitas Mortar Geopolimer di Air Gambut [PDF]

open access: yes, 2015
This research studies the durability of OPC mortar, geopolymer mortar based fly ash and geopolymer mortar based palm oil fuel ash in acidic environment like peat water and netral environment like aquadest.
Olivia, M. (Monita)   +2 more
core  

Impact of wet supercritical CO2 injection on fly ash geopolymer cement under elevated temperatures for well cement applications

open access: yesJournal of Petroleum Exploration and Production Technology, 2019
An alternative cement system created through geopolymerization of fly ash offers favorable properties such as able to resist acidic fluids and possess high compressive strength.
Syahrir Ridha   +3 more
doaj   +1 more source

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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