Addressing the need for standardization of test methods for self-healing concrete: an interlaboratory study on concrete with macrocapsules
Authors:
- Tim Van Mullem,
- Giovanni Anglani,
- Marta Dudek,
- Hanne Vanoutrive,
- Girts Bumanis,
- Chrysoula Litina,
- Arkadiusz Kwiecień,
- Abir Al-Tabbaa,
- Diana Bajare,
- Teresa Stryszewska,
- Robby Caspeele,
- Kim Van Tittelboom,
- Tulliani Jean-Marc,
- Elke Gruyaert,
- Paola Antonaci,
- Nele De Belie
Abstract
Development and commercialization of self-healing concrete is hampered due to a lack of standardized test methods. Six inter-laboratory testing programs are being executed by the EU COST action SARCOS, each focusing on test methods for a specific self-healing technique. This paper reports on the comparison of tests for mortar and concrete specimens with polyurethane encapsulated in glass macrocapsules. First, the pre-cracking method was analysed: mortar specimens were cracked in a three-point bending test followed by an active crack width control technique to restrain the crack width up to a predefined value, while the concrete specimens were cracked in a three-point bending setup with a displacement-controlled loading system. Microscopic measurements showed that with the application of the active control technique almost all crack widths were within a narrow predefined range. Conversely, for the concrete specimens the variation on the crack width was higher. After pre-cracking, the self-healing effect was characterized via durability tests: the mortar specimens were tested in a water permeability test and the spread of the healing agent on the crack surfaces was determined, while the concrete specimens were subjected to two capillary water absorption tests, executed with a different type of waterproofing applied on the zone around the crack. The quality of the waterproofing was found to be important, as different results were obtained in each absorption test. For the permeability test, 4 out of 6 labs obtained a comparable flow rate for the reference specimens, yet all 6 labs obtained comparable sealing efficiencies, highlighting the potential for further standardization.
- Record ID
- CUTc0d542f34ca742b1b0bd8184138a63ea
- Publication categories
- ;
- Author
- Journal series
- Science and Technology of Advanced Materials, ISSN 1468-6996, e-ISSN 1878-5514
- Issue year
- 2020
- Vol
- 21
- No
- 1
- Pages
- 661-682
- Other elements of collation
- fot.; rys.; tab.; wykr.; Bibliografia (na s.) - 680-682; Bibliografia (liczba pozycji) - 57; Oznaczenie streszczenia - Abstr.; Data udostępnienia on-line - 2020-09-22; Numeracja w czasopiśmie - Vol. 21, Iss. 1
- Keywords in English
- round robin test, self-healing concrete, standardization, macrocapsules, polyurethane, capillary water absorption, water permeability, active crack width control technique, machine learning
- DOI
- DOI:10.1080/14686996.2020.1814117 Opening in a new tab
- URL
- https://www.tandfonline.com/doi/full/10.1080/14686996.2020.1814117 Opening in a new tab
- Language
- eng (en) English
- License
- Score (nominal)
- 100
- Publication indicators
- = 40
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUTc0d542f34ca742b1b0bd8184138a63ea/
- URN
urn:pkr-prod:CUTc0d542f34ca742b1b0bd8184138a63ea
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.