Preparation and optimization of bio-based and light weight aggregate-based healing agent for application in concrete

Preparation and optimization of bio-based and light weight aggregate-based healing agent for application in concrete

Tziviloglou, E.
Wiktor, V.A.C.
Jonkers, H.M.
Schlangen, E.

Civil Engineering and Geosciences

Structural Engineering

2015-12-31

The innovative technology of self-healing concrete allows the material to repair the open micro-cracks that can endanger the structure’s durability, due to ingress of aggressive liquids. Various concepts of self-healing concrete use encapsulation techniques, in order to immobilize and protect the healing agent during mixing and setting. In this paper the bio-based healing agent, consisting of alkaliphilic bacterial spores and organic mineral compounds (feed), is encapsulated into light weight aggregates (LWA). Although, the concept of shielding the healing agent in LWA capsules is simple and effective, there are some challenges regarding the incorporation procedure. In this study a method for efficient incorporation of healing agent into the LWA is developed. The results obtained in the current study show that the optimized method increases considerably the amount of healing agent embedded into LWA, in comparison with what was achieved in a previous study. As a consequence, the LWA treated with the new incorporation procedure are likely to provide better crack sealing and therefore enhanced durability protection for concrete.

bio-based self healing agent
light weight aggregates
impregnation procedure
oxygen consumption

http://resolver.tudelft.nl/uuid:5c49fc58-b1b6-4498-8716-2cff822caedd

Proceedings of the 5th International Conference on Self-Healing Materials, ICSHM, Durham, USA, June 22-24, 2015. Extended abstract

Institutional Repository

conference paper

(c) 2015 The Author(s)