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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Csetényi, L. J.
University of Dundee
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (24/24 displayed)
- 2024Mechanical processing of wet stored fly ash for use as a cement component in concrete
- 2024Assessing setting times of cementitious materials using semi‑adiabatic calorimetry
- 2023Portlandcementek Kötési Idejének Meghatározása Féladiabatikus Kalorimetriás Módszerrel
- 2023Fungal biorecovery of cerium as oxalate and carbonate biomineralscitations
- 2022Impact of fly ash production and sourcing changes on chemical and physical aspects of concrete durabilitycitations
- 2022Fungal colonization and biomineralization for bioprotection of concretecitations
- 2022Influence of wet storage on fly ash reactivity and processing for use in concretecitations
- 2022Fungal-induced CaCO3 and SrCO3 precipitationcitations
- 2021Potential of Weathered Blast Furnace Slag for use as an Addition in Concretecitations
- 2020Oil-based mud waste reclamation and utilisation in low-density polyethylene compositescitations
- 2019Direct and indirect bioleaching of cobalt from low grade laterite and pyritic ores by Aspergillus nigercitations
- 2019Amino acid secretion influences the size and composition of copper carbonate nanoparticles synthesized by ureolytic fungicitations
- 2017Evaluation of Fly Ash Reactivity Potential Using a Lime Consumption Testcitations
- 2016Abrasion resistance of sustainable green concrete containing waste tire rubber particlescitations
- 2016Performance Characteristics of Waste Glass Powder Substituting Portland Cement in Mortar Mixturescitations
- 2015Influence of Portland cement characteristics on air-entrainment in fly ash concretecitations
- 2015Sustainable use of marble slurry in concretecitations
- 2015Durability studies on concrete containing wollastonitecitations
- 2013Mechanical and durability studies on concrete containing wollastonite-fly ash combinationcitations
- 2013Evaluating Test Methods for Rapidly Assessing Fly Ash Reactivity for Use in Concrete
- 2010Mechanisms of sulfate heave prevention in lime stabilized clays through pozzolanic additionscitations
- 2003Alkali activation of PFA
- 2002Effect of potassium on setting times of borate admixed cement pastes
- 2001Phase equilibrium study in the CaO-K2O-B2O3-H2O system at 25°Ccitations
Places of action
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article
Evaluation of Fly Ash Reactivity Potential Using a Lime Consumption Test
Abstract
The reactivity of fly ash, for use in concrete, is normally evaluated in the UK/EU with the Activity Index test (on mortars at 28 and 90 days (BS EN 450-1)). The paper reports on the application of a lime consumption test, based on BS EN 196-5 (pozzolanic cement test), to determine this more rapidly. The method uses a Portland cement (PC) / fly ash slurry, stored for 8 or 15 days at 40°C, and measures OHand CaO concentrations of the filtrate. Seven fly ashes, including those produced using modern power station techniques (e.g. co-combustion, low NOx) and 3 PCs with different characteristics were tested. Early experiments established good repeatability for the test and that pozzolanic reactions mainly occur during the initial 8 to 15 days’ storage. Similar behaviour for fly ash was noted to that in thermogravimetric analysis and Activity Index tests from related studies. Strong correlations were obtained for fly ash fineness and CaO consumed. While there was general agreement for CaO consumed and Activity Index, correlations were poor. Similar type effects occur for mortar (Activity Index) and concrete. The lime consumption test can assess fly ash reactivity, but should be combined with measurements of the materials’ fineness.