As a promising alternative to alkali-activated fly ash (AAF) for high temperature application, the degradation mechanism of ash/GGBS (AAFS) under is not clear. This work investigates physicochemical properties AAFS up 800 °C and presents their synergetic influence on thermal behavior. A quantitative assessment crack developed learn cracking Results reveal that density exhibits linear relationsh...

This work studies the feasibility to employ a combination of volcanic ash (natural waste) with different raw materials in production geopolymers: fly and mining tailing (considered hazardous solid waste), natural pozzolan, metakaolin. study compares properties geopolymers based on ash, metakaolin, relation 1:1 addition NaOH 15M Na2SiO3 as alkali activators. FTIR XRD assays mechanical tests were...

In this work, the effects of slag addition on geopolymerization process and sulfate resistance alkali-activated cement were studied. The substitution metakaolin by increased reactivity precursors, contributing to a higher reaction rate accelerating process. mechanical properties significantly improved with incorporation slag. results show that transformation gel phases development pore structur...

Geopolymer cement (GPC) is an aluminosilicate-based binder that cost-effective and eco-friendly, with high compressive strength resistance to acid attack. It can prevent degradation when exposed carbon dioxide by virtue of the low calcium content aluminosilicate source. The effect concentration chloride (CaCl2) as accelerator on acoustic impedance GPC for well cement, while pressure temperature...

Food containers made from glass are separately collected urban solid waste at 76% in most parts of Europe. The cullet finds its way to re-melting, while the debris is often disposed of. With this contribution, we suggest an upcycling process where simply ground without any washing operation and added alkali-activated paste. Metakaolin-based geopolymer mortar with coarsely as fine aggregate has ...

Researchers conducted research into the strength properties of a Geopolymer produced from eggshell powder, bauxite, and flyash with RGL (Reaction generating liquid) cure for 84 days at ambient temperature. Also studied were changes in products Morphology, XRD, FTIR studies SEM images microstructure. The results indicated that, various mix proportions, gradually improved 28 to days. aged Geopoly...

Microwave cure was used for the quick curing process of fly ash (FA) geopolymer fabrication heavy metal immobilization purposes. The geopolymers synthesized by microwave were applied Pb ion in matrix. Fly raw material and alkaline activator sodium silicate hydroxide (NaOH) solution fixed at mass ratio 2.5 geopolymerization. 0.5 wt% Pb(NO3)2 added to pastes precured 30 °C 2 h carrying out dense ...

The type of aluminosilicate precursor used in the synthesis geopolymer binders plays a huge role resulting performance. Thus, it is critical to understand properties precursors and how they influence corresponding performance binders. In this study, metakaolin meta halloysite are as These obtained locally order propel sustainable development application geopolymers. were characterized on reacti...

This study focuses on evaluating the unconfined compressive strength (UCS) of improved fine-grained soils. A large database of unconfined compressive strength of clayey soil specimens stabilized with fly ash and blast furnace slag based geopolymer were collected and analyzed. Subsequently, using adaptive neuro fuzzy inference system (ANFIS), a model has been developed to assess the UCS of stabi...

The mining industry manages large volumes of tailings, sludge, and residues that represent a huge environmental issue. This fact has prompted research into valorization these wastes as alternative aggregates for concrete production, embankments, pavement material, etc. use resource construction presents two benefits: conserving natural resources reducing the impacts mining. In case road constru...