Self-healing efficiency of Ultra High-Performance Fiber-Reinforced Concrete through permeability to chlorides
| Autor: | Marta Roig-Flores, Pedro Serna, Hesam Doostkami |
|---|---|
| Přispěvatelé: | European Commission |
| Rok vydání: | 2021 |
| Předmět: |
Autogenous healing
Materials science Self-healing water penetration 02 engineering and technology Fiber-reinforced concrete chlorides 01 natural sciences law.invention Chlorides law 0103 physical sciences Water Penetration self-healing General Materials Science Fiber Composite material ultra-high-performance fiber reinforced concrete crystalline admixture Civil and Structural Engineering 010302 applied physics Chloride penetration autogenous healing Crystalline Admixture Building and Construction Penetration (firestop) 021001 nanoscience & nanotechnology Ultra-High-Performance Fiber Reinforced Concrete Permeability (earth sciences) Crack size Ultra high performance 0210 nano-technology |
| Zdroj: | Construction and Building Materials Repositori Universitat Jaume I Universitat Jaume I |
| ISSN: | 0950-0618 |
| DOI: | 10.1016/j.conbuildmat.2021.125168 |
| Popis: | This study presents a novel methodology to evaluate the self-healing capability of Ultra High-Performance Fiber-Reinforced Concrete (UHPFRC) designed to compare conventional concrete types. The procedure used combines loading reinforced concrete elements until a fixed strain level to have a comparable total crack opening. Afterwards, water penetration to chlorides is used as an indicator of permeability. This work compares autogenous healing efficiency of a conventional concrete, a high-performance concrete, and two types of UHPFRCs with and without 0.8% of a crystalline admixture (CA) by the binder weight. The results show that all UHPFRC specimens exhibited excellent autogenous healing, higher than conventional concretes for an equivalent total crack. The self-healing results depended greatly on the crack size and the fiber content. Additionally, UHPFRCs with CA obtained the lowest water permeability after promoting self-healing for one month in water immersion and presented almost complete healing against chloride penetration. The activity described in this paper has been performed in the framework of the project “Rethinking coastal defence and Green-energy Service infrastructures through enHancEd-durAbiLity high-performance cement-based materials-ReSHEALience”, funded by the European Union Horizon 2020 research and innovation programme under GA No 760824. The authors would also like to thank Sika and Penetron for providing materials for the tests and E.J. Mezquida-Alcaraz for the characterization of UHPFRC mixes with Inverse Analysis. |
| Databáze: | OpenAIRE |
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