alkaliactivated concrete with serbian fly ash and its

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Alkali-activated concrete with Serbian fly ash and its ...

Mar 01, 2017  The characterization of fly ash and its products will open the possibility for a wide use both outdoors and indoors, as soil stabilization, road sub-base construction and as binder in alkali-activated concrete. Alkali-activated fly ash concrete (AAFAC) has attracted much interest in academic and commercial spheres over the past decade.

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Alkali-activated concrete with Serbian fly ash and its ...

Alkali-activated concrete with Serbian fly ash and its radiological impact. Nuccetelli C(1), Trevisi R(2), Ignjatović I(3), Dragaš J(4). Author information: (1)National Institute of Health, Technology and Health Department, viale Regina Elena, 299, 00167 Rome, Italy.

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This is the peer-reviewed version of the article ...

ALKALI-ACTIVATED CONCRETE WITH SERBIAN FLY ASH AND ITS RADIOLOGICAL IMPACT Abstract The present paper reports the results of a study on different types of fly ash from Serbian coal burning power plants and their potential use as a binder in alkali-activated concrete (AAC) depending on their radiological and mechanical properties.

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Alkali-activated concrete with Serbian fly ash and its ...

As an appendix, a synthesis of main results concerning mechanical and chemical properties is provided.This is the peer reviewed version of the following article: Nuccetelli C., Trevisi R., Ignjatović I., Dragaš J. (2016): Alkali-activated concrete with Serbian fly ash and its radiological impact, Journal of Environmental Radioactivity, 2016 ...

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Alkali-activated concrete with Serbian fly ash and its ...

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Alkali-Activated Hybrid Concrete Based on Fly Ash and Its ...

Oct 17, 2020  Alkali-Activated Hybrid Concrete Based on Fly Ash and Its Application in the Production of High-Class Structural Blocks Oriana Rojas-Duque, Lina Marcela Espinosa , Rafael A. Robayo-Salazar and Ruby Mejía de Gutiérrez * Composites Materials Group (CENM), Universidad de Valle, Calle 13 #100-00, E44, Cali 760032, Colombia;

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Alkali-activated concrete with Serbian fly ash and its ...

As an appendix, a synthesis of main results concerning mechanical and chemical properties is provided.This is the peer reviewed version of the following article: Nuccetelli C., Trevisi R., Ignjatović I., Dragaš J. (2016): Alkali-activated concrete with Serbian fly ash and its radiological impact, Journal of Environmental Radioactivity, 2016 ...

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Alkali-activated concrete with Serbian fly ash and its ...

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CONCRETE BASED ON ALKALI ACTIVATED FLY ASH FROM

4MSc, Department of Materials and Structures, University of Belgrade, Faculty of Civil Engineering, Belgrade, Serbia Abstract Alkali activated fly ash concrete (AAFAC) prepared with a class F fly ash from power plant „Nikola Tesla B“ and a mixed alkali activator of sodium silicate and sodium hydroxide solutions was investigated.

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(PDF) CONCRETE BASED ON ALKALI ACTIVATED FLY ASH FROM

Alkali activated fly ash concrete (AAFAC) prepared with a class F fly ash from power plant " Nikola Tesla B " and a mixed alkali activator of sodium silicate and sodium hydroxide solutions was ...

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Alkali-Activated Hybrid Concrete Based on Fly Ash and Its ...

This article reports the production and characterization of a hybrid concrete based on the alkaline activation of a fly ash (FA) of Colombian origin, which was added with 10% Portland cement (OPC) in order to promote the compressive strength development at room temperature. The alkali-activated hybrid cement FA/OPC 90/10 was classified as a low heat reaction cement (type LH), according to ...

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External sulfate attack on alkali-activated fly ash-blast ...

External sulfate attack on alkali-activated fly ash-blast furnace slag composite N. Dzˇunuzovic´, M. Komljenovic´ ⇑, V. Nikolic´, T. Ivanovic´ Institute for Multidisciplinary Research, University of Belgrade, Kneza Viseslava 1, 11000 Belgrade, Serbia highlights External sulfate attack on alkali-activated binder (AAB) and CEM II was tested.

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Controlling workability in alkali-activated Class C fly ash

Sep 20, 2018  Class C fly ashes, which generally contain more than 20% CaO, have been shown to produce a stronger concrete than Class F fly ashes when alkali activated [2] and a denser microstructure with smaller pores [1]. However, alkali-activated Class C fly ash often exhibits rapid stiffening and setting [2], [3], which can inhibit workability.

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Formulation of alkali-activated fly ash-slag binders for ...

May 01, 2021  In this paper the links between the composition of alkali-activated fly ash slag blend, its rheological behavior and its performance in 3D printing are evaluated. The requirements of mixtures for 3D concrete printing included extrusion without segregation, shape retention in

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Physical–mechanical and microstructural properties of ...

Jan 01, 2015  The relationship between flexural and compressive strength of mortars of alkali-activated FA, BFS and their blends is shown for comparison purposes in Fig. 2 together with the relationship for OPC concretes as specified in ACI 318-02 .Alkali-activated materials usually exhibit higher flexural strength than would be predicted from the standard relationships for OPC concretes , , , .

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Physical and mechanical properties of hemp fibre ...

Oct 30, 2020  Two alkali-activated mortars with different solid prime materials were analysed. The first mortar contained fly ash, had lower density, higher water absorption, lower compactness, lower compressive strength, similar flexural strength and was less brittle than the second one with fly ash

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Micromechanical analysis of interfacial transition zone in ...

May 01, 2021  1. Introduction. Alkali-activated fly ash-slag (AAFS) concrete, as a blended alkali-activated concrete (AAC), is regarded as an eco-friendly alternative to Portland cement (PC) concrete [1,2].This new concrete has been attracting increasing attention from industrial engineers and scientific researchers because it can achieve a good synergy between fresh and hardened properties at ambient ...

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Radioactivity and Pb and Ni immobilization in SCM-bearing ...

Jan 20, 2018  Alkali-activated fly ash (AAFA) systems likewise immobilize heavy metals, with efficiency depending on binder microstructure , . The presence of lead has been observed to impact mechanical strength, however , , . Palacios and Palomo proved that in AAFA systems lead adopts the highly insoluble form of Pb 3 SiO 5.

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Fly ash as a raw material for low-carbon cement clinkers ...

Apr 28, 2021  Potential comprehensive solutions in order to protect environment is the synthesis of alternative mineral binders such as belite-sulfoaluminate cement clinkers, which are considered as energy and carbon reducing, allowing the substitution of natural raw materials with secondary ones. In this study, three different samples of fly ash (FA) from "Nikola Tesla" Thermal power plant (Serbia) were

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Activated Concrete - an overview ScienceDirect Topics

The publication reports results of a study on five different types of fly ash from Serbian coal burning power plants and their potential use as a binder in alkali-activated concrete (AAC), depending on their radiological and mechanical properties. Five AAC mixtures with different types of coal burning fly ash and one type of blast-furnace slag ...

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Alkali-activated concrete with Serbian fly ash and its ...

As an appendix, a synthesis of main results concerning mechanical and chemical properties is provided.This is the peer reviewed version of the following article: Nuccetelli C., Trevisi R., Ignjatović I., Dragaš J. (2016): Alkali-activated concrete with Serbian fly ash and its radiological impact, Journal of Environmental Radioactivity, 2016 ...

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(PDF) Experimental study of alkali activated fly ash ...

PDF On Sep 1, 2015, Ivan Slobodan Ignjatovic published Experimental study of alkali activated fly ash concrete with fly ash from one Serbian power plant Find, read and cite all the research ...

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Concrete based on alkali activated fly ash from one power ...

Nov 15, 2014  IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 pISSN: 2321-7308 _____

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Alkali-Activated Hybrid Concrete Based on Fly Ash and Its ...

Oct 17, 2020  This article reports the production and characterization of a hybrid concrete based on the alkaline activation of a fly ash (FA) of Colombian origin, which was added with 10% Portland cement (OPC ..

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pH Level of Pore Solution in Alkali-Activated Fly-Ash ...

Sep 09, 2020  Pore solution of the hardened geopolymer concrete was extracted and the pH value of the pore solution was determined. Results suggest that the extent of ASR reaction based on the presence of all three types of aggregates in fly ash–based geopolymer concrete is substantially smaller than that of ordinary portland cement (OPC)-based concrete.

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‪Jelena Dragaš‬ - ‪Google Scholar‬

Alkali-activated concrete with Serbian fly ash and its radiological impact C Nuccetelli, R Trevisi, I Ignjatović, J Dragaš Journal of environmental radioactivity 168, 30-37 , 2017

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Faculty of Civil Engineering, Belgrade, Serbia

Cristina Nuccetelli, Rosabianca Trevisi, Ivan Ignjatović, Jelena Dragaš (2017) Alkali-activated concrete with Serbian fly ash and its radiological impact. Journal of Environmental Radioactivity . 168 (), pp.30-37.

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Alkali-Activated Coal Ash(Fly Ash, Bottom Ash) Artificial ...

In order to apply alkali-activated coal ash(fly ash, bottom ash) artificial lightweight aggregate to concrete, several experimental studies were performed. Thus, it can be noticed the optimal mix proportion, basic characteristies, mechanical properties and environmental safety of alkali-activated coal ash(fly ash, bottom ash) solid and alkali ...

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Alkali-Activated Coal Ash(Fly Ash, Bottom Ash) Artificial ...

Alkali-Activated Coal Ash(Fly Ash, Bottom Ash) Artificial Lightweight Aggregate and Its Application of Concrete December 2004 Journal of the Korea Concrete Institute 16(6)

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Jelena DRAGAS Teaching assistant, PhD student Doctor ...

The present paper reports the results of a study on different types of fly ash from Serbian coal burning power plants and their potential use as a binder in alkali-activated concrete (AAC ...

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Fly Ash for Concrete Pavement Construction - The Constructor

1. Introduction of Fly Ash for Concrete Pavement. The application of fly ash in concrete pavement dates back to more than 2000 years. Canada used to construct its roadways and highways using fly ash in the early ‘50s and ’60s.

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What is Alkali-Activated Concrete (AAC)? - The Constructor

Hydration of Alkali-Activated Concrete. The hydration reaction in alkali-activated concrete is more complex than ordinary portland cement. Its mechanism is not fully understood and is still under research. As the characteristics of slag used vary from source to source, the reaction and microstructure also vary.

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Why Alkali-Activated Materials are NOT Geopolymers ...

Jul 27, 2017  27 min, 62 MB, 6920 downloads.Click on the icon on the right to watch it fullscreen. Part 1 (2014): AAM are not geopolymers, two different chemistries. Prof. J. Davidovits explains the main differences between AAC (Alkali-Activated Cement or Concrete), AAS (Alkali-Activated Slag), AAF (Alkali-Activated Fly Ash) and Slag-based Geopolymer cement, in terms of chemistry, molecular structure, long

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Effects of modulus ratio and dosage of alkali-activated ...

The modulus of elasticity of alkali-activated fly ash concrete was found to be similar to that of conventional concrete. Additionally, the shrinkage of concrete tended to decrease with increasing ...

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