Effect of crack pattern on the self-healing capability in traditional, HPC and UHPFRC concretes measured by water and chloride permeability
Concrete has a natural self-healing capability to seal small cracks, named autogenous healing, which is mainly produced by continuing hydration and carbonation. This capability is very limited and is activated only when in direct contact with water. High Performance Fibre-Reinforced Concrete and Eng...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2019-01-01
|
| Series: | MATEC Web of Conferences |
| Online Access: | https://www.matec-conferences.org/articles/matecconf/pdf/2019/38/matecconf_cs18_01006.pdf |
| _version_ | 1828976742846431232 |
|---|---|
| author | Negrini Alberto Roig-Flores Marta Mezquida-Alcaraz Eduardo J. Ferrara Liberato Serna Pedro |
| author_facet | Negrini Alberto Roig-Flores Marta Mezquida-Alcaraz Eduardo J. Ferrara Liberato Serna Pedro |
| author_sort | Negrini Alberto |
| collection | DOAJ |
| description | Concrete has a natural self-healing capability to seal small cracks, named autogenous healing, which is mainly produced by continuing hydration and carbonation. This capability is very limited and is activated only when in direct contact with water. High Performance Fibre-Reinforced Concrete and Engineered Cementitious Composites have been reported to heal cracks for low damage levels, due to their crack pattern with multiple cracks and high cement contents. While their superior self-healing behaviour compared to traditional concrete types is frequently assumed, this study aims to have a direct comparison to move a step forward in durability quantification. Reinforced concrete beams made of traditional, high-performance and ultra-high-performance fibre-reinforced concretes were prepared, sized 150×100×750 mm3. These beams were pre-cracked in flexion up to fixed strain levels in the tensioned zone to allow the analysis of the effect of the different cracking patterns on the self-healing capability. Afterwards, water permeability tests were performed before and after healing under water immersion. A modification of the water permeability test was also explored using chlorides to evaluate the potential protection of this healing in chloride-rich environments. The results show the superior durability and self-healing performance of UHPFRC elements. |
| first_indexed | 2024-12-14T14:44:37Z |
| format | Article |
| id | doaj.art-22502bcaff4c4962b5aff4445fcc6a46 |
| institution | Directory Open Access Journal |
| issn | 2261-236X |
| language | English |
| last_indexed | 2024-12-14T14:44:37Z |
| publishDate | 2019-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | MATEC Web of Conferences |
| spelling | doaj.art-22502bcaff4c4962b5aff4445fcc6a462022-12-21T22:57:19ZengEDP SciencesMATEC Web of Conferences2261-236X2019-01-012890100610.1051/matecconf/201928901006matecconf_cs18_01006Effect of crack pattern on the self-healing capability in traditional, HPC and UHPFRC concretes measured by water and chloride permeabilityNegrini AlbertoRoig-Flores Marta0Mezquida-Alcaraz Eduardo J.1Ferrara Liberato2Serna Pedro3Universitat Politècnica de València, Instituto de Ciencia y Tecnología del HormigónUniversitat Politècnica de València, Instituto de Ciencia y Tecnología del HormigónPolitecnico di MilanoUniversitat Politècnica de València, Instituto de Ciencia y Tecnología del HormigónConcrete has a natural self-healing capability to seal small cracks, named autogenous healing, which is mainly produced by continuing hydration and carbonation. This capability is very limited and is activated only when in direct contact with water. High Performance Fibre-Reinforced Concrete and Engineered Cementitious Composites have been reported to heal cracks for low damage levels, due to their crack pattern with multiple cracks and high cement contents. While their superior self-healing behaviour compared to traditional concrete types is frequently assumed, this study aims to have a direct comparison to move a step forward in durability quantification. Reinforced concrete beams made of traditional, high-performance and ultra-high-performance fibre-reinforced concretes were prepared, sized 150×100×750 mm3. These beams were pre-cracked in flexion up to fixed strain levels in the tensioned zone to allow the analysis of the effect of the different cracking patterns on the self-healing capability. Afterwards, water permeability tests were performed before and after healing under water immersion. A modification of the water permeability test was also explored using chlorides to evaluate the potential protection of this healing in chloride-rich environments. The results show the superior durability and self-healing performance of UHPFRC elements.https://www.matec-conferences.org/articles/matecconf/pdf/2019/38/matecconf_cs18_01006.pdf |
| spellingShingle | Negrini Alberto Roig-Flores Marta Mezquida-Alcaraz Eduardo J. Ferrara Liberato Serna Pedro Effect of crack pattern on the self-healing capability in traditional, HPC and UHPFRC concretes measured by water and chloride permeability MATEC Web of Conferences |
| title | Effect of crack pattern on the self-healing capability in traditional, HPC and UHPFRC concretes measured by water and chloride permeability |
| title_full | Effect of crack pattern on the self-healing capability in traditional, HPC and UHPFRC concretes measured by water and chloride permeability |
| title_fullStr | Effect of crack pattern on the self-healing capability in traditional, HPC and UHPFRC concretes measured by water and chloride permeability |
| title_full_unstemmed | Effect of crack pattern on the self-healing capability in traditional, HPC and UHPFRC concretes measured by water and chloride permeability |
| title_short | Effect of crack pattern on the self-healing capability in traditional, HPC and UHPFRC concretes measured by water and chloride permeability |
| title_sort | effect of crack pattern on the self healing capability in traditional hpc and uhpfrc concretes measured by water and chloride permeability |
| url | https://www.matec-conferences.org/articles/matecconf/pdf/2019/38/matecconf_cs18_01006.pdf |
| work_keys_str_mv | AT negrinialberto effectofcrackpatternontheselfhealingcapabilityintraditionalhpcanduhpfrcconcretesmeasuredbywaterandchloridepermeability AT roigfloresmarta effectofcrackpatternontheselfhealingcapabilityintraditionalhpcanduhpfrcconcretesmeasuredbywaterandchloridepermeability AT mezquidaalcarazeduardoj effectofcrackpatternontheselfhealingcapabilityintraditionalhpcanduhpfrcconcretesmeasuredbywaterandchloridepermeability AT ferraraliberato effectofcrackpatternontheselfhealingcapabilityintraditionalhpcanduhpfrcconcretesmeasuredbywaterandchloridepermeability AT sernapedro effectofcrackpatternontheselfhealingcapabilityintraditionalhpcanduhpfrcconcretesmeasuredbywaterandchloridepermeability |