A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Self-Compacting Concrete with Nanosilica and Carbon Nanofibers
This study aimed to assess the changes of behavior due to the addition of nanosilica and carbon nanofibers in SCC. The target was to identify variations at early ages and in the hardened state due to the addition of nano-size components. The setting process and early ages were monitored during the first 24 h, combining several experimental techniques as ultrasonic pulse velocity, temperature, capillary pressure, free shrinkage, cracking, and mass loss. In addition, the porous microstructure in the hardened state was evaluated measuring vapor permeability, mercury intrusion porosimetry and a mechanical characterization.
The results pointed out that the size of the nano-components affected capillary pressure development at early ages and reduced vapor permeability in the hardened state. The reactivity of the component also affected evaporation, drying shrinkage and cracking risks at early ages and pore and solid structure in the hardened state. On the other hand, the use of carbon nanofibers produced larger cracking risk at early ages, which can be mitigated by the addition of low amounts of polypropylene microfibers.
Self-Compacting Concrete with Nanosilica and Carbon Nanofibers
This study aimed to assess the changes of behavior due to the addition of nanosilica and carbon nanofibers in SCC. The target was to identify variations at early ages and in the hardened state due to the addition of nano-size components. The setting process and early ages were monitored during the first 24 h, combining several experimental techniques as ultrasonic pulse velocity, temperature, capillary pressure, free shrinkage, cracking, and mass loss. In addition, the porous microstructure in the hardened state was evaluated measuring vapor permeability, mercury intrusion porosimetry and a mechanical characterization.
The results pointed out that the size of the nano-components affected capillary pressure development at early ages and reduced vapor permeability in the hardened state. The reactivity of the component also affected evaporation, drying shrinkage and cracking risks at early ages and pore and solid structure in the hardened state. On the other hand, the use of carbon nanofibers produced larger cracking risk at early ages, which can be mitigated by the addition of low amounts of polypropylene microfibers.
Self-Compacting Concrete with Nanosilica and Carbon Nanofibers
Sobolev, Konstantin (editor) / Shah, Surendra P. (editor) / Puentes, Javier (author) / Barluenga, Gonzalo (author) / Palomar, Irene (author)
Nanotechnology in Construction ; Chapter: 65 ; 493-498
2015-01-01
6 pages
Article/Chapter (Book)
Electronic Resource
English
| DOAJ | 2022
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