Journal Article10.1016/J.CEMCONRES.2005.03.003
Composition and Microstructure of Alkali Activated Fly Ash Binder: Effect of the Activator
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TL;DR: In this paper, the relationship between the mineralogical and microstructural characteristics of activated fly ash mortars and its mechanical properties has been established, and the results of the investigation show that in all cases (whatever the activator used) the main reaction product formed is an alkaline aluminosilicate gel, with low-ordered crystalline structure.
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About: This article is published in Cement and Concrete Research. The article was published on 01 Oct 2005. The article focuses on the topics: Fly ash & Aluminosilicate.
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Citations
Compressive Strength Properties of Fly Ash-Based Geopolymer Concrete
TL;DR: In this article, the authors investigate experimentally the mechanical characteristics of the compressive strength and elastic modulus of concrete using three types of binder that are ordinary Portland cement, fly ash and physically milled fly ash.
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Microstructural Analysis of Low-Calcium Fly Ash-Based Geopolymer Concrete with Different Ratios of Activator and Binder Under High Temperatures
Hurmet Kucukgoncu,Ahmet Özbayrak +1 more
TL;DR: Microstructural analysis of low-calcium fly ash-based geopolymer concrete with different ratios of activator and binder under high temperatures reveals significant loss of mass and compressive strength, primarily due to crack formation, voids and porosities in the geopolymer matrix.
Dynamic formation of zeolite synthesized from fly ash by alkaline hydrothermal conversion
TL;DR: It is suggested that the reuse of recycled synthesis materials should occur during the fourth step (24–72 h), which determined the quality of zeolite crystallization, coupled with functions of re-assembling the silicon–aluminium tetrahedral network and developing submicro- and/or nanometer microstructure.
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A Review of Biomass Wood Ash in Alkali-Activated Materials: Treatment, Application, and Outlook
Yiying Du,Ina Pundienė,Jolanta Pranckevičienė,Modestas Kligys,Giedrius Girskas,Aleksandrs Korjakins +5 more
TL;DR: AAMs incorporating BWA as a precursor exhibit low mechanical strength due to its low chemical and hydraulic reactivity. Further research is needed to investigate the effects of BWA characteristics on the property evolution of AAMs and develop new approaches to improve their effectiveness.
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Hydration/modification of fly ash in a fluidized bed
TL;DR: In this paper, the authors introduced fluidized bed reactor-vapor deposition (FBR-VD) into the modification of fly ash (FA) using the activators of HCl (HC), H2SO4 (HS), NaCl (NC), NH, NaOH (NH), NS, and NaCl(NC) to reveal the modification mechanism and hydration process of FA.
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References
Alkali-activated fly ashes: A cement for the future
TL;DR: In this paper, the mechanism of activation of fly ash with highly alkaline solutions is described, and the product of the reaction is an amorphous aluminosilicate gel having a structure similar to that of zeolitic precursors.
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Synthesis and characterisation of materials based on inorganic polymers of alumina and silica: sodium polysialate polymers
TL;DR: In this article, a statistical study of the effect on the polymerization process of the molar ratio of the component oxides and the water content of the mixture showed the latter to be a critical parameter.
1K
Synthesis of zeolites from coal fly ash: an overview
Xavier Querol,Natalia Moreno,J.C Umaña,Andrés Alastuey,E. Hernández,Angel Lopez-Soler,F. Plana +6 more
TL;DR: An overview on the methodologies for zeolite synthesis from CFA, and a detailed description of conventional alkaline conversion processes, with special emphasis on the experimental conditions to obtain high cation exchange capacity (CEC) zeolites is given in this article.
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Microstructure Development of Alkali-Activated Fly Ash Cement: A Descriptive Model
TL;DR: In this paper, the microscopic study of a set of alkali-activated and thermally cured fly ash samples enabled the authors to establish a descriptive model for the microstructural development of fly ash-based cementitious geopolymers.
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Characterisation of fly ashes. Potential reactivity as alkaline cements
TL;DR: In this article, a representative group of Spanish fly ashes has been characterised in order to determine its capacity for being alkali activated and give place to a material with cementitious properties.
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