| People | Locations | Statistics |
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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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Barbosa, Ricardo Antonio
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2024Towards Extending the Range of Supplementary Cementitious Materials in ASR Regulations
- 2024Laboratory and field investigations of alkali-silica reaction prevention by supplementary cementitious materials:Influence of the free alkali loadingcitations
- 2023Pore solution alkalinity of cement paste as determined by Cold Water Extractioncitations
- 2023Pore solution alkalinity of cement paste as determined by Cold Water Extractioncitations
- 2022Predicting the effect of SCMs on ASR in the accelerated mortar bar test with artificial neural networks
- 2022Predicting the effect of SCMs on ASR in the accelerated mortar bar test with artificial neural networks
- 2022Controlling ASR in concrete by surface treatment - Field performance investigation
- 2017Influence of alkali-silica reaction on the physical, mechanical, and structural behaviour of reinforced concrete
- 2015Severe ASR damaged concrete bridges
- 2014Novel shear capacity testing of ASR damaged full scale concrete bridgecitations
- 2014Alkali-Silica Reaction in Reinforced Concrete Structures, Part II
Places of action
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document
Controlling ASR in concrete by surface treatment - Field performance investigation
Abstract
Several concrete structures in Denmark have been built with potentially ASR-reactive aggregates. Most of these concrete structures have been constructed in the 60's and 70's and includes more than 600 large concrete bridges. Unfortunately, during the last 10 to 20 years an increasing number of these concrete structures have become severely deteriorated due to alkali-silica reaction (ASR). Since it can be extremely expensive to replace these concrete structures, it is desirable to develop and implement better economic methods to prolong the service life of these concrete structures. Surface treatment of concrete samples in the laboratory shows promising results by controlling the moisture content. The surface treatment can delay or even prevent the ASR from developing. In this study, it is investigated whether silane-based surface treatment can reduce the relative humidity inside the concrete. Eight concrete cubes (0.3x0.3x0.3m<sup>3</sup>) with water/cement-ratios of 0.45 and 0.55 have been casted and exposed to outdoor climate conditions over a period of nearly three years. Half of the concrete cubes contain ASR-reactive aggregates (porous opaline flint) and half of the concrete cubes have been impregnated with a silane-based surface treatment. Moisture and temperature sensors (HumiGuard) measure the relative humidity and the temperature inside the concrete cubes during outdoor exposure (field exposure). The results of this study show that the surface treatment can significantly reduce the relative humidity inside the concrete. Furthermore, it is shown that the ASR expansion was delayed or even prevented by avoiding external moisture contribution to the ASR development. The wlc-ratio has a significant influence on the initiation of cracking in the concrete cubes.