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| Naji, M. |
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| Ertürk, Emre |
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| Petrov, R. H. | Madrid |
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| Azevedo, Nuno Monteiro |
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Sasanipour, Hossein
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (7/7 displayed)
- 2022Deicer Salt-Scaling Resistance of Concrete Using Recycled Concrete Aggregates Pretreated by Silica Fume Slurrycitations
- 2021Chloride ion permeability improvement of recycled aggregate concrete using pretreated recycled aggregates by silica fume slurrycitations
- 2020Durability properties evaluation of self-compacting concrete prepared with waste fine and coarse recycled concrete aggregatescitations
- 2020Durability assessment of concrete containing surface pretreated coarse recycled concrete aggregatescitations
- 2019The Effect of Fine and Coarse Recycled Aggregates on Fresh and Mechanical Properties of Self-Compacting Concretecitations
- 2019Effect of specimen shape, silica fume, and curing age on durability properties of self-compacting concrete incorporating coarse recycled concrete aggregatescitations
- 2019Effect of silica fume on durability of self-compacting concrete made with waste recycled concrete aggregatescitations
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article
Chloride ion permeability improvement of recycled aggregate concrete using pretreated recycled aggregates by silica fume slurry
Abstract
<p>This paper aims to investigate the effects of surface pretreatment method by soaking recycled concrete aggregates (RCAs) in silica fume slurry on mechanical and durability properties of recycled aggregate concrete (RAC). Two surface modification methods, namely RACCM and RACCD were used to improve durability of mixes. Hardened properties of the mixes were assessed in terms of compressive strength and ultrasonic pulse velocity.Water absorption, bulk electrical resistivity and rapid chloride penetration test (RCPT) and rapid chloride migration test (RCMT) were experimentally tested to characterize durability properties. In addition, Scanning Electron Microscopy (SEM) of mixes was carried out and the effect of surface modification method on the microstructure of specimens was studied. Results revealed that using pretreated recycled aggregates significantly improved durability properties of mixes especially chloride ion penetration and electrical resistivity. Moreover, SEM images showed that utilizing pretreated RCAs had a pronounce influence to improve the interface transition zone culminating in lower permeability of specimens and higher electrical resistance. The correlation results showed a strong relationship between total charge passed and electrical resistivity.</p>