Interphase modification of alkali-resistant glass fibres and carbon fibres for textile reinforced concrete I: Fibre properties and durability

Sizings and coatings are considered to heal severe surface flaws of brittle alkali-resistant glass (ARG) fibres. The interaction between sizings and coatings is varied systematically resulting in different surface modifications and interphase properties in cement matrix composites. Investigations of the durability after accelerated aging are made and the mechanical properties of sized and coated ARG are elucidated as a function of fibre diameter, sizing and coating content, respectively, as well as their chemical formulations under special consideration of nanotubes and nanoclay concentrated within the interphase. Furthermore, the results achieved with nano-dispersed polymer coatings on glass fibres are transferred to carbon fibres.