Effect of microsilica and acrylic: Polymer treatment on the ageing of GRC

Wenzhong Zhu, Peter Bartos

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

Microsilica and acrylic polymer dispersions were used in different types of fibre treatments and matrix modifications. The effects of the various treatments/modifications on the flexural properties, the failure modes and the interfacial changes after different periods of ageing were investigated. The fibre treatment was found to be more effective in controlling the interfacial changes and properties of the aged composites, compared to the matrix modification. The relative effectiveness of the different fibre treatments, however; depended greatly on the bundle size of the fibre reinforcement used.

A new technique based on an unique microindentation apparatus was developed and used to carry out micro-strength testing in the fibre-matrix interfacial zone and particularly within the fibre bundle. Results suggested that a soft/flexible fibre bundle core combined with a strong bonding at the fibre-matrix interface was desirable for the optimal improvement of the long term performance of the composites.
Original languageEnglish
Pages (from-to)31-39
Number of pages9
JournalCement & Concrete Composites
Volume18
Issue number1
DOIs
Publication statusPublished - 1996

Keywords

  • glass fibres
  • fibre bundles
  • glass reinforced cement
  • acrylic polymer
  • microsilica
  • interfaces bond micro-fracture mechanics

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