Effects of pozzolanic additives on long-term flexural toughness of HPGFRC

Title: Effects of pozzolanic additives on long-term flexural toughness of HPGFRC
Author(s): A. M. Brandt, M. A. Glinicki
Paper category : conference
Book title: International Workshop High Performance Fiber Reinforced Cement Composites
Editor(s): A. E. Naaman and H. W. Reinhardt
Print-ISBN: 2-912143-38-1
e-ISBN: 2912143799
Publisher: RILEM Publications SARL
Publication year: 2003
Pages: 399 - 408
Total Pages: 10
Nb references: 8
Language: English

Abstract: The aim of investigations was to supply data for application of the general semi-probabilistic format of limit states with partial coefficients to design of HPGFRC elements (HPGFRC - high performance glass fibre reinforced concrete). The flexural toughness of fibre reinforced cement composites was investigated both in the short term and after accelerated ageing. Chopped strand of high zirconia glass fibres was applied as dispersed reinforcement. An influence of pozzolanic additives, such as metakaolin and diatomite, as well combinations of diatomite with metakaolin and silica fume, on the energy absorption in flexure was tested. Test results showed a significant increase in flexural toughness and ultimate tensile strain of composites with an increase of pozzolana content. A decrease of toughness due to ageing was effectively controlled by addition of metakaolin and diatomite, however these effects were also influenced by number of glass filaments in a single strand. Microscopic observations aided with X-ray microprobe (SEM/EDX) revealed a relation between the embrittlement of the composite and the phase composition of CSH at fibre-matrix interface.

Online publication: 2003-04-28
Publication type : abstract_only
Public price (Euros): 0.00