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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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Adu-Amankwah, Samuel
Aston University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2023Impact of hydration stoppage on quantification of the GGBS content in ternary limestone cements using the PONKCS methodcitations
- 2023Circular economy, data analytics, and low carbon concreting: a case for managing recycled powder from end-of-life concretecitations
- 2023Early age reaction of slag in composite cement: Impact of sulphates and calcitecitations
- 2022Application of the Rietveld-PONKCS technique for quantitative analysis of cements and pitfalls of hydration stopping methodscitations
- 2022Low-carbon concreting: a harmonised approach between material selection and design
- 2022From composition to the microstructure and durability of limestone ternary blended cements:citations
- 2021Combined influence of carbonation and leaching on freeze-thaw resistance of limestone ternary cement concretecitations
- 2017Influence of limestone on the hydration of ternary slag cementscitations
- 2016Effect of synthesis parameters on the performance of alkali-activated non-conformant EN 450 pulverised fuel ashcitations
Places of action
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article
Combined influence of carbonation and leaching on freeze-thaw resistance of limestone ternary cement concrete
Abstract
Performance of OPC and composite cements including limestone ternary blended concretes and pastes exposed to natural carbonation, leaching, and freeze-thaw (FT) cycles and their coupling were investigated. The combined regime is analogous to the Capillary suction, internal damage and Freeze-thaw (CIF) test. The freeze-thaw test results showed that composite cement concretes are more susceptible to surface scaling and internal damage. Microanalysis of complementary cement pastes revealed partial carbonation after equilibration at 65% RH. Decalcification due to leaching accompanied capillary suction, profound in the partially carbonated ternary cement pastes such that portlandite was depleted from the surface before the FT cycles commenced. Successive cycles increased porosity; heterogeneity and coarsening of the pore structures were drastic when carbonation and leaching preceded FT, modifying the C-S-H morphology and composition. Curtailing carbonation and leaching reduced surface scaling and internal damage to comparable levels as OPC of the same strength class. These findings imply that changes in porosity and phase assemblage in composite cements caused by carbonation and leaching contributed to their FT susceptibility.