Materiales de Construcción, Vol 66, No 323 (2016)

Capsules with evolving brittleness to resist the preparation of self-healing concrete


https://doi.org/10.3989/mc.2016.07115

E. Gruyaert
Magnel Laboratory for Concrete Research, Department of Structural Engineerin, Faculty of Engineering and Architecture, Ghent University, Belgium

K. Van Tittelboom
Magnel Laboratory for Concrete Research, Department of Structural Engineerin, Faculty of Engineering and Architecture, Ghent University, Belgium

J. Sucaet
Magnel Laboratory for Concrete Research, Department of Structural Engineerin, Faculty of Engineering and Architecture, Ghent University, Belgium

J. Anrijs
Magnel Laboratory for Concrete Research, Department of Structural Engineerin, Faculty of Engineering and Architecture, Ghent University, Belgium

S. Van Vlierberghe
Polymer Chemistry and Biomaterials Group, Department of Organic and Macromolecular Chemistry, Faculty of Sciences, Ghent University, Belgium

P. Dubruel
Polymer Chemistry and Biomaterials Group, Department of Organic and Macromolecular Chemistry, Faculty of Sciences, Ghent University, Belgium

B. G. De Geest
Department of Pharmaceutics, Ghent University, Belgium

J. P. Remon
Department of Pharmaceutics, Ghent University, Belgium

N. De Belie
Magnel Laboratory for Concrete Research, Department of Structural Engineerin, Faculty of Engineering and Architecture, Ghent University, Belgium

Abstract


Capsules for self-healing concrete have to possess multifunctional properties and it would be an enormous advantage in the valorization process when they could also be mixed in. Therefore, we aimed to develop capsules with evolving brittleness.
Capsules with high initial flexibility were prepared by adding a plasticizer to an ethyl cellulose matrix. During hardening of the concrete, the plasticizing agent should leach out to the moist environment yielding more brittle capsules which break upon crack appearance.
The tested capsules could easily be mixed in during concrete production. However, incompatibility issues between the capsule wall and the inner polymeric healing agent appeared. Moreover, the capsules became insufficiently brittle and the bond strength to the cementitious matrix was too weak.
Consequently, multilayer capsules were tested. These capsules had a high impact resistance to endure concrete mixing and were able to break upon crack formation.

Keywords


Concrete; Mortar; Polymer; Durability; Mechanical properties

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References


1. Dry, C. (1994) Smart multiphase composite materials that repair themselves by a release of liquids that become solids, in: Proceedings SPIE 2189, Smart Structures and Materials 1994: Smart Materials, 62–70. http://dx.doi.org/10.1117/12.174085

2. Dry, C.; McMillan, W. (1996) Three-part methylmethacrylate adhesive system as an internal delivery system for smart responsive concrete. Smart Materials and Structures 5, 297–300. http://dx.doi.org/10.1088/0964-1726/5/3/007

3. Dry, C. (2000) Three designs for the internal release of sealants, adhesives, and waterproofing chemicals into concrete to reduce permeability. Cem. Concr. Res. 30, 1969–1977. http://dx.doi.org/10.1016/S0008-8846(00)00415-4

4. Dry, C.; Corsaw, M. (2003) A comparison of bending strength between adhesive and steel reinforced concrete with steel only reinforced concrete. Cem. Concr. Res 33, 1723–1727. http://dx.doi.org/10.1016/S0008-8846(03)00102-9

5. Mihasi, H.; Kaneko, Y.; Nishiwaki T.; Otsuka K. (2000) Fundamental study on development of intelligent concrete characterized by self-healing capability for strength. Transactions of the Japan Concrete Institute 22, 441–450.

6. Zhang, M.; Han, N.; Xing, F.; Wang, X.; Schlangen, E. (2013) Design of microcapsule system used for self-healing cementitious material, in: N. De Belie, S. van der Zwaag, E. Gruyaert, K. Van Tittelboom, B. Debbaut (Eds.) Fourth international conference on self-healing materials, Ghent, Belgium, 109.

7. Cailleux, E.; Pollet, V. (2009) Investigations on the development of self-healing properties in protective coatings for concrete and repair mortars, in: Second International Conference on Self Healing Materials, 120.

8. Kaltzakorta, I.; Erkizial, E. (2011) Silica microcapsules encapsulating epoxy compounds for self-healing cementitious materials, in: I. Bond, R. Varley (Eds.) Third international conference self-healing materials, Bath, United Kingdom, 271–272.

9. Li, W.; Buhrow, J.W.; Calle, L.M. (2011) Synthesis of elongated microcapsules, in: I. Bond, R. Varley (Eds.) Third international conference self-healing materials, Bath, United Kingdom, 273–274.

10. Yang, Z.; Hollar, J.; He, X.; Shi, X. (2011) A self-healing cementitious composite using oil core/silica gel shell microcapsules. Cem. Concr. Comp. 33, 506–512. http://dx.doi.org/ 10.1016/j.cemconcomp.2011.01.010. http://dx.doi.org/10.1016/j.cemconcomp.2011.01.010

11. Wang, J.; Soens, H.; Verstraete, W.; De Belie, N. (2014) Self-healing concrete by use of microencapsulated bacterial spores, Cem. Concr. Res. 56, 139–152. http://dx.doi.org/10.1016/j.cemconres.2013.11.009

12. Joseph, C.; Jefferson, A.D.; Canoni, M.B. (2007) Issues relating to the autonomic healing of cementitious materials, in: First International Conference on Self-healing Materials, 1–8. PMCid:PMC1783642

13. Li, V.C.; Lim, Y.M.; Chan Y.-W. (1998) Feasibility study of a passive smart self-healing cementitious composite. Compos. Part B: Eng. 29, 819–827. http://dx.doi.org/10.1016/S1359-8368(98)00034-1

14. Thao, T.D.P.; Johnson, T.J.S.; Tong, Q.S.; Dai, P.S. (2009) Implementation of self healing in concrete - Proof of concept. The IES Journal Part A: Civil & Structural Engineering 2, 116–125. http://dx.doi.org/10.1080/19373260902843506

15. Mookhoek, S.D.; Fischer, H.R.; van der Zwaag, S. (2009) A numerical study into the effects of elongated capsules on the healing efficiency of liquid-based systems. Comp. Mater. Sci. 47, 506–511. http://dx.doi.org/10.1016/j.commatsci.2009.09.017

16. Mookhoek, S.D. (2010) Novel routes to liquid-based self-healing polymer systems, PhD, Technische Universiteit Delft, Delft.

17. Hilloulin, B.; Van Tittelboom, K.; Gruyaert, E.; De Belie, N.; Loukili, A. (2015) Design of polymeric capsules for self-healing concrete. Cem. Concr. Comp 55, 298–307. http://dx.doi.org/10.1016/j.cemconcomp.2014.09.022

18. Nishiwaki, T.; Oohira, A.; Pareek, S. (2011) An experimental study on the application of self-repairing system to RC structures using selective heating, in: I. Bond, R. Varley (Eds.) Third international conference self-healing materials, Bath, United Kingdom, 320–321.

19. Isaacs, B.; Lark, R.J.; Jefferson, A.D.; Gardner, D.; Dunn, S. (2011) Enhancement of self-healing in cementitious materials, in: I. Bond, R. Varley (Eds.) Third international conference self-healing materials, Bath, United Kingdom, 119–120.

20. Dry, C.; Corsaw, M.; Bayer, E. (2003) A comparison of internal self-repair with resin injection in repair of concrete. J. Adhes. Sci. Technol. 17, 79–89. http://dx.doi.org/10.1163/15685610360472457

21. Sangadji, S.; Schlangen, E. (2011) Porous network concrete: a new approach to make concrete structures self-healing using prefabricated porous layer, in: I. Bond, R. Varley (Eds.) Third international conference self-healing materials, Bath, United Kingdom, 291–292.

22. Van Tittelboom, K. (2012) Self-healing concrete through incorporation of encapsulated bacteria- or polymer-based healing agents, PhD, Ghent University, Ghent.

23. Rahman, M.; Brazel, C.S. (2004) The plasticizer market: an assessment of traditional plasticizers and research trends to meet new challenges. Prog. Polym. Sci. 29, 1223–1248. http://dx.doi.org/10.1016/j.progpolymsci.2004.10.001

24. Bruneel, D; Dirinck, P. (2007) Organische Chemie Deel 1 (in Dutch), Kaho Sint-Lieven. PMCid:PMC2675417

25. Ray, J.A. (1978) Hydraulic cement mixes and process for improving hydraulic cement mixes (US4089696).

26. Windels, C. (2010) Optimale samenstelling en duurzaamheid van volledig recycleerbaar beton (in Dutch), Master thesis at Ghent University, Ghent.

27. Rowe, R.C.; Sheskey, P.J.; Owen, S.C. (2006) Handbook of Pharmaceutical Excipients (fifth edition), Washington D.C.




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