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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
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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.