Current research in timed release of repair chemicals from fibers into matrices

Carolyn M. Dry

doi:10.1117/12.184858

13 September 1994 Current research in timed release of repair chemicals from fibers into matrices

Carolyn M. Dry

Proceedings Volume 2361, Second European Conference on Smart Structures and Materials; (1994) https://doi.org/10.1117/12.184858
Event: Smart Structures and Materials: Second European Conference, 1994, Glasgow, United Kingdom

Abstract

The subject of this research is the enhancement of properties beyond that available in an original hardened material by the release of 'healing' chemicals such as adhesives from hollow fibers into cementitious matrices in response to loading. Thus, the sensing of a crack by the fibers or the breaking of coating starts the activation of a remedial process (i.e., the release of a sealing or adhering chemical). This capacity for self-healing occurs whenever and wherever cracks are generated. In terms of fracture mechanics, this research concerns the repair of cracks and rebonding of fibers by chemicals released from hollow fibers at the fiber wall and into the adjacent cracks. The overall property change is an increased flexural toughening. The mechanisms for that appears to be an adhesive rebonding of the fibers and a crack-filling with adhesives which causes the material to become stronger when it is bonded inside cracks or pores.

Citation Download Citation

Carolyn M. Dry "Current research in timed release of repair chemicals from fibers into matrices", Proc. SPIE 2361, Second European Conference on Smart Structures and Materials, (13 September 1994); https://doi.org/10.1117/12.184858

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