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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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Florea, Miruna V. A.
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Topics
Publications (7/7 displayed)
- 2020Recycling and utilization of high volume converter steel slag into CO2 activated mortars – The role of slag particle sizecitations
- 2020Evaluation of municipal solid waste incineration filter cake as supplementary cementitious materialcitations
- 2019Methods for determining and tracking the residual cement paste content of recycled concrete
- 2019Influence of particle size distribution and MSWI bottom ash aggregate replacement in zero-slump concrete
- 2017Quantification of concrete aggregate liberation through abrasion comminution
- 2017Liberation of original natural aggregates from recycled concrete by abrasion comminution
- 2016Processing disaster debris liberating aggregates for structural concrete
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document
Methods for determining and tracking the residual cement paste content of recycled concrete
Abstract
The attached cement paste on recycled concrete aggregates (RCA) is the main factor causing impaired quality of the new concrete. Since attached mortar is not as hard or strong as natural aggregates, its presence<br/>weakens the overall performance of the RCA. Additionally, the attached mortar is known to cause a higher water absorption, an increased water cement ratio, and therefore a more porous and weaker concrete.<br/>Due to the negative influence of the attached mortar on the RCA properties, ideally all mortar should be removed from the original natural aggregates, returning the recycled concrete into its original aggregates and hardened cement paste (HCP). In order to study the efficiency of treatments designed to achieve this purpose, methods for estimating the amount of HCP attached to the original aggregates need to be used. Such methods, which include e.g. composition tests (XRF, XRD), thermogravimetric analysis or chemical<br/>methods are generally time-consuming and complex. In this study, a more straightforward method based on oxide composition is proposed and corroborated with the results from other test results.