Applicability of cementitious capsules in concrete production: initial assessment on capsule robustness, mechanical and self-sealing properties of concrete
The use of macrocapsules in self-healing applications offers a potential benefit by carrying a larger amount of healing agent in comparison with microcapsules. However, the application of macrocapsules is still limited to paste and mortar levels on lab-scale. This is due to a concern that most capsu...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2023-01-01
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| Series: | MATEC Web of Conferences |
| Online Access: | https://www.matec-conferences.org/articles/matecconf/pdf/2023/05/matecconf_smartincs2023_02013.pdf |
| _version_ | 1827955656743714816 |
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| author | Hermawan Harry Simons Alicia Teirlynck Silke Serna Pedro Minne Peter Anglani Giovanni Tulliani Jean-Marc Antonaci Paola Gruyaert Elke |
| author_facet | Hermawan Harry Simons Alicia Teirlynck Silke Serna Pedro Minne Peter Anglani Giovanni Tulliani Jean-Marc Antonaci Paola Gruyaert Elke |
| author_sort | Hermawan Harry |
| collection | DOAJ |
| description | The use of macrocapsules in self-healing applications offers a potential benefit by carrying a larger amount of healing agent in comparison with microcapsules. However, the application of macrocapsules is still limited to paste and mortar levels on lab-scale. This is due to a concern that most capsules might be broken when mixed with concrete components. In this study, cementitious tubular capsules were used and they were considered as a partial replacement of coarse aggregates (2 vol% gravel). The capsules have a dimension of 54 mm and 9 mm in length and outer diameter, respectively. A water-repellent agent (WRA) was entrapped in the capsules as a proposed agent to seal the crack. Initial results revealed high survivability of capsules during concrete mixing: 100% survival ratio when tested in a drum mixer and 70–95% when tested in a planetary mixer. The mechanical and self-sealing properties of concrete containing embedded capsules were evaluated. With the addition of capsules, around 8% reduction of compressive strength was noticed, but no further effect on splitting tensile strength was detected as compared with concrete without capsules. Ultrasonic pulse velocity (UPV) tests confirmed that the presence of capsules also did not significantly affect the compactness of the hardened concrete. Furthermore, the embedded capsules were able to break when a crack was introduced and it was found that 90% sealing efficiency was achieved by capsule-based concrete as a result of the successful release of sealing agent into the crack. |
| first_indexed | 2024-04-09T14:50:44Z |
| format | Article |
| id | doaj.art-30d6c17384ed4c61a7197efa8d9073b4 |
| institution | Directory Open Access Journal |
| issn | 2261-236X |
| language | English |
| last_indexed | 2024-04-09T14:50:44Z |
| publishDate | 2023-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | MATEC Web of Conferences |
| spelling | doaj.art-30d6c17384ed4c61a7197efa8d9073b42023-05-02T09:34:12ZengEDP SciencesMATEC Web of Conferences2261-236X2023-01-013780201310.1051/matecconf/202337802013matecconf_smartincs2023_02013Applicability of cementitious capsules in concrete production: initial assessment on capsule robustness, mechanical and self-sealing properties of concreteHermawan Harry0Simons Alicia1Teirlynck Silke2Serna Pedro3Minne Peter4Anglani Giovanni5Tulliani Jean-Marc6Antonaci Paola7Gruyaert Elke8KU Leuven, Department of Civil Engineering, Materials and Constructions, Ghent CampusKU Leuven, Department of Civil Engineering, Materials and Constructions, Ghent CampusKU Leuven, Department of Civil Engineering, Materials and Constructions, Ghent CampusInstituto de Ciencia y Tecnología Del Hormigón (ICITECH), Universitat Politècnica de ValènciaKU Leuven, Department of Civil Engineering, Materials and Constructions, Ghent CampusDepartment of Structural, Geotechnical and Building Engineering (DISEG), Politecnico di TorinoINSTM Research Unit PoliTO-LINCE Laboratory, Department of Applied Science and Technology (DISAT), Politecnico di TorinoDepartment of Structural, Geotechnical and Building Engineering (DISEG), Politecnico di TorinoKU Leuven, Department of Civil Engineering, Materials and Constructions, Ghent CampusThe use of macrocapsules in self-healing applications offers a potential benefit by carrying a larger amount of healing agent in comparison with microcapsules. However, the application of macrocapsules is still limited to paste and mortar levels on lab-scale. This is due to a concern that most capsules might be broken when mixed with concrete components. In this study, cementitious tubular capsules were used and they were considered as a partial replacement of coarse aggregates (2 vol% gravel). The capsules have a dimension of 54 mm and 9 mm in length and outer diameter, respectively. A water-repellent agent (WRA) was entrapped in the capsules as a proposed agent to seal the crack. Initial results revealed high survivability of capsules during concrete mixing: 100% survival ratio when tested in a drum mixer and 70–95% when tested in a planetary mixer. The mechanical and self-sealing properties of concrete containing embedded capsules were evaluated. With the addition of capsules, around 8% reduction of compressive strength was noticed, but no further effect on splitting tensile strength was detected as compared with concrete without capsules. Ultrasonic pulse velocity (UPV) tests confirmed that the presence of capsules also did not significantly affect the compactness of the hardened concrete. Furthermore, the embedded capsules were able to break when a crack was introduced and it was found that 90% sealing efficiency was achieved by capsule-based concrete as a result of the successful release of sealing agent into the crack.https://www.matec-conferences.org/articles/matecconf/pdf/2023/05/matecconf_smartincs2023_02013.pdf |
| spellingShingle | Hermawan Harry Simons Alicia Teirlynck Silke Serna Pedro Minne Peter Anglani Giovanni Tulliani Jean-Marc Antonaci Paola Gruyaert Elke Applicability of cementitious capsules in concrete production: initial assessment on capsule robustness, mechanical and self-sealing properties of concrete MATEC Web of Conferences |
| title | Applicability of cementitious capsules in concrete production: initial assessment on capsule robustness, mechanical and self-sealing properties of concrete |
| title_full | Applicability of cementitious capsules in concrete production: initial assessment on capsule robustness, mechanical and self-sealing properties of concrete |
| title_fullStr | Applicability of cementitious capsules in concrete production: initial assessment on capsule robustness, mechanical and self-sealing properties of concrete |
| title_full_unstemmed | Applicability of cementitious capsules in concrete production: initial assessment on capsule robustness, mechanical and self-sealing properties of concrete |
| title_short | Applicability of cementitious capsules in concrete production: initial assessment on capsule robustness, mechanical and self-sealing properties of concrete |
| title_sort | applicability of cementitious capsules in concrete production initial assessment on capsule robustness mechanical and self sealing properties of concrete |
| url | https://www.matec-conferences.org/articles/matecconf/pdf/2023/05/matecconf_smartincs2023_02013.pdf |
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