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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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Mccarthy, Michael John
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2024Mechanical processing of wet stored fly ash for use as a cement component in concrete
- 2022Impact of fly ash production and sourcing changes on chemical and physical aspects of concrete durabilitycitations
- 2022Influence of wet storage on fly ash reactivity and processing for use in concretecitations
- 2021Potential of Weathered Blast Furnace Slag for use as an Addition in Concretecitations
- 2019Pozzolanas and pozzolanic materialscitations
- 2017Evaluation of Fly Ash Reactivity Potential Using a Lime Consumption Testcitations
- 2015Influence of Portland cement characteristics on air-entrainment in fly ash concretecitations
- 2013Evaluating Test Methods for Rapidly Assessing Fly Ash Reactivity for Use in Concrete
- 2011Fly Ash Route to Low Embodied CO2 and Implications for Concrete Construction
- 2010Mechanisms of sulfate heave prevention in lime stabilized clays through pozzolanic additionscitations
- 2009Experiences of Processing Fly Ashes Recovered from United Kingdom Stockpiles and Lagoons, their Characteristics and Potential End Uses
- 2007Utilising Class F Fly Ash to Offset Non-ideal Aggregate Characteristics for Concrete in Chloride Environments
- 2004Comparative performance of chloride attenuating and corrosion inhibiting systems for reinforced concretecitations
- 2003Moving Fly Ash Utilisation in Concrete Forward
- 2001Specifying concrete for chloride environments using controlled permeability formworkcitations
Places of action
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document
Evaluating Test Methods for Rapidly Assessing Fly Ash Reactivity for Use in Concrete
Abstract
In addition to various properties, including fineness and loss-on-ignition, used to assess fly ash, standards covering the material as an addition in concrete normally include a measure of its pozzolanic activity.While variations exist, approaches commonly used involve testing the compressive strength of standard fly ash mortar, at different ages, and comparisons with the corresponding Portland cement reference.Given the nature of the material, these can be carried out over extended periods (e.g. 90 days for Activity Index in BS EN 450-1).If the timescale was reduced, this could offer benefits with regard to fly ash production testing and subsequent use.The paper will review various options in the literature towards achieving this and describe an investigation carried out to examine the potential of selected property measurements/techniques in the role.These include (i) fly ash characteristics: fineness, bulk chemistry and amorphous content; (ii) accelerated curing (elevated temperature) conditions for Activity Index and hydrated lime/fly ash mortars; and (iii) wet chemical tests involving lime-consumption.The methods were considered for a range of Class F fly ashes covering the effects of different sources, seasonal variations and co-combustion, with evaluations made through comparisons against the Activity Index to BS EN 450-1.The paper will identify their relative effectiveness in assessing fly ash reactivity and explore how they relate to concrete.