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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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Vinai, Raffaele
University of Exeter
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2018Use of Vietnamese rice husk ash for the production of sodium silicate as the activator for alkali-activated binderscitations
- 2017The Influence of Paste Content, Water-to-Solid Ratio and Binder Blend on Compressive Strength and Workability of Ambient Temperature Cured Alkali Activated Concrete
- 2017Towards greener concrete: The challenges of sus-con projectcitations
- 2017Guidelines for mix proportioning of fly ash/GGBS based alkali activated concretescitations
- 2016The Role of Water Content and Paste Proportion on Physico-mechanical Properties of Alkali Activated Fly Ash–Ggbs Concretecitations
- 2016Factors influencing the compressive strength of fly ash based geopolymerscitations
- 2016Factors influencing the compressive strengths of fly ash based geopolymerscitations
- 2016Development of sustainable, innovative and energy-efficient concrete, based on the integration of all-waste materials: SUS-CON panels for building applications
- 2015Sustainable concrete: design and testing
- 2015Sustainable concrete: design and testing
- 2014Alkali activated fuel ash and slag mixes
Places of action
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article
Guidelines for mix proportioning of fly ash/GGBS based alkali activated concretes
Abstract
The effects of paste volume, water content and precursor blend on consistency, setting time and compressive strength of alkali activated concrete (AAC) produced with fly ash (FA) and ground granulated blast furnace slag (GGBS) have been investigated with the aim of developing a suitable mix design procedure. Paste volumes in the range 30–33% were found not to influence the compressive strength but did influence the consistency of the mixes. The water-to-solid ratio was found to influence compressive strength and setting time. Increasing GGBS content in the binder blend resulted in an increase of the compressive strength, but higher GGBS content caused also early setting which may be undesirable. A mix design procedure has been developed and has been used to determine the constituent mix proportions for three classes of concretes, i.e. (a) a ready-mix concrete with nominal strength 35 MPa, (b) a typical structural concrete with nominal strength 50 MPa, and (c) a high strength concrete for precast applications with nominal strength 70 MPa. Cost analysis was carried out to compare the AAC with Portland cement concretes with similar properties. Normal strength Portland cement concrete (PC), as typically used in ready mix industry has been shown to be less expensive than AAC. However, alkali activated concrete can be competitively priced for high strength concretes. An empirical step-by-step procedure is presented for selecting trial mix proportions for concretes with a range of consistency values, setting times and cube compressive strengths.