Self Healing Concrete: A Biological Approach

Self Healing of Concrete Structures - Novel Approach Using Porous Network Concrete

“…Nature provides many lesson as biological materials show capabilities to heal it self by neutralize wound or injury to reach its previous performance. Along with the damage management paradigm observed in nature as proposed by Van der Zwaag (2007), many scientists have developed self-healing materials that mimics many of the features of a biological system. Many techniques and methods have been developed according to the intrinsic properties between the various material classes.…”

“…In the last 5 years the design of materials with healing ability is becoming more and more popular in a wide range of materials and applications (Van der Zwaag 2007, Gosh 2008). For cement based materials different method can be found in literature.…”

“…Another approach is incorporating an expansive component in the concrete which starts to expand and fill voids and cracks when triggered by carbonation or moisture ingress (Hosoda et al 2007, Sisomphon et al 2009). Using bacteria to stimulate the self healing mechanism is an alternative but promising technique studied at different groups (Bang et al 2001, Jonkers and Schlangen 2007, De Muynck et al 2008, Wiktor and Jonkers 2011. More information on the various projects carried out at Delft University can be found on a special Blog that is created (www.selfhealingconcrete.blogspot.com).…”

Un nouveau béton auto-cicatrisant grâce à l’incorporation de bactéries

“…Ainsi, divers agents cicatrisants, majoritairement de nature chimique, ont été dé-veloppés et appliqués avec succès dans les matériaux cimentaires [1,13,14]. Plus récemment, la possibilité d'utiliser un agent cicatrisant d'origine biologique a été considérée [15][16][17][18]. En effet, certaines bactéries ont la capacité de précipiter le calcium qu'elles trouvent dans leur environnement sous forme de carbonate de calcium [19].…”

“…Ainsi, ces systèmes ne sont pas à proprement parler autonomes. Récemment, Jonkers et al [15][16][17] ont dé-veloppé un système auto-cicatrisant constitué de spores bactériennes et d'un produit organique. Après germination des spores, les bactéries catalysent la conversion méta-bolique du composé organique en carbonate de calcium.…”