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Properties of glass fibres in cement environment

Majumdar, A.J. / West, J.M. / Larner, L.J.

Fibres produced from a soda-silica-zirconia glass were reacted with Portland cement extracts at 20 and 65C for various lengths of time and their strength and stiffness determined. The results indicate that these glass fibres resist the attack of cement extracts reasonably well at ambient temperatures. Fibre strengths of the order of 1200 to 1300 N mm(-2) are obtainable after 2 years at 20C, sufficient to reinforce cement, and there is no change in the Young's modulus of the fibre during this period. At higher temperatures both strength and stiffness are reduced but these temperatures are unlikely to be encountered in practice over extended periods of time. When fibres removed from cement composites containing commercially made alkali-resistant glass fibres are examined, it is found that fibre strengths depend very strongly on the environment in which the composites were kept. For air storage, fibre properties remain relatively unaffected but for composites kept under water continuously, an initial loss in fibre strength is observed. This difference in fibre strength is reflected in the relative strength of the cement composites.

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Properties of glass fibres in cement environment

Majumdar, A.J. / West, J.M. / Larner, L.J.

Fibres produced from a soda-silica-zirconia glass were reacted with Portland cement extracts at 20 and 65C for various lengths of time and their strength and stiffness determined. The results indicate that these glass fibres resist the attack of cement extracts reasonably well at ambient temperatures. Fibre strengths of the order of 1200 to 1300 N mm(-2) are obtainable after 2 years at 20C, sufficient to reinforce cement, and there is no change in the Young's modulus of the fibre during this period. At higher temperatures both strength and stiffness are reduced but these temperatures are unlikely to be encountered in practice over extended periods of time. When fibres removed from cement composites containing commercially made alkali-resistant glass fibres are examined, it is found that fibre strengths depend very strongly on the environment in which the composites were kept. For air storage, fibre properties remain relatively unaffected but for composites kept under water continuously, an initial loss in fibre strength is observed. This difference in fibre strength is reflected in the relative strength of the cement composites.

Properties of glass fibres in cement environment

Majumdar, A.J. / West, J.M. / Larner, L.J.

Fibres produced from a soda-silica-zirconia glass were reacted with Portland cement extracts at 20 and 65C for various lengths of time and their strength and stiffness determined. The results indicate that these glass fibres resist the attack of cement extracts reasonably well at ambient temperatures. Fibre strengths of the order of 1200 to 1300 N mm(-2) are obtainable after 2 years at 20C, sufficient to reinforce cement, and there is no change in the Young's modulus of the fibre during this period. At higher temperatures both strength and stiffness are reduced but these temperatures are unlikely to be encountered in practice over extended periods of time. When fibres removed from cement composites containing commercially made alkali-resistant glass fibres are examined, it is found that fibre strengths depend very strongly on the environment in which the composites were kept. For air storage, fibre properties remain relatively unaffected but for composites kept under water continuously, an initial loss in fibre strength is observed. This difference in fibre strength is reflected in the relative strength of the cement composites.

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Title:

Properties of glass fibres in cement environment

Additional title:

Eigenschaften von Glasfasern in Umgebung von Zement

Contributors:

Majumdar, A.J. (author) / West, J.M. (author) / Larner, L.J. (author)

Published in:

Journal of Materials Science ; 12 ; 927-936

Publication date:

1977

Size:

10 Seiten, 17 Quellen

ISSN:

DOI:

https://doi.org/10.1007/BF00540975

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

CHEMISCHE BESTAENDIGKEIT , ELASTIZITAETSMODUL , GLASFASER , KORROSION , PORTLANDZEMENT , BETON , MECHANISCHE EIGENSCHAFT , MESSEN , ALKALIEN , BRUCHFESTIGKEIT

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