Durability and simulated ageing of new matrix glass fibre reinforced concrete

This paper applies a model of glass fibre reinforced concrete (grc) degradation, based on the glass technology principle of static fatigue, to a large body of diverse data, some collected from both industry and open literature and some generated by the authors. Activation energies for the strength loss process in OPC and modified matrix grcs are derived and it is shown that the modified matrix grcs degrade by a different mechanism to OPC grc. In consequence, using traditional acceleration factors to predict the long term behaviour of modified matrix grc can lead to severe over-estimation of durability. It is also concluded that hot water ageing is not suitable for polymer modified grc and that ageing at temperatures over 65 °C may lead to the activation of strength loss processes not encountered during natural weathering in some matrices.

[1]  R. Gy.  Stress corrosion of silicate glass: a review , 2003 .

[2]  Surendra P. Shah,et al.  Durability of glass fiber reinforced cement composites , 1997 .

[3]  B. A. Proctor,et al.  A test method for the strength of glass fibres in cement , 1984 .

[4]  J. Aveston,et al.  Single and Multiple Fracture , 1971 .

[5]  Indentation Determination of Fatigue Limits in Silicate Glasses , 2004 .

[6]  B. A. Proctor,et al.  Developments in the assessment and performance of grc over 10 years , 1982 .

[7]  N. R. Short,et al.  Determination of bond strength in glass fibre reinforced cement using petrography and image analysis , 2000 .

[8]  Arnon Bentur,et al.  Durability of Glass‐Fiber‐Reinforced Cements with Different Alkali‐Resistant Glass Fibers , 1985 .

[9]  Y. Shiue,et al.  Apparent activation energy of fused silica optical fibers in static fatigue in aqueous environments , 2002 .

[10]  A. J. Majumdar,et al.  Microstructure of glass fibre-reinforced cement composites , 1976 .

[11]  Harold Eric Avery,et al.  Basic Reaction Kinetics and Mechanisms , 1974 .

[12]  K. Speakman,et al.  Chemical interactions between glass fibres and cement , 1976 .

[13]  F. Glasser,et al.  Reaction of alkali-resistant glass fibres with cement. I, Review, assessment, and microscopy , 1991 .

[14]  Donald R Uhlmann,et al.  Elasticity and strength in glasses , 1980 .

[15]  N. R. Short,et al.  Accelerated ageing characteristics of glass-fibre reinforced cement made with new cementitious matrices , 1999 .

[16]  A. Bentur.  ROLE OF INTERFACES IN CONTROLLING DURABILITY OF FIBER-REINFORCED CEMENTS , 2000 .

[17]  R. Mills.  Preferential precipitation of calcium hydroxide on alkali-resistant glass fibres , 1981 .

[18]  C. L. Page,et al.  A static fatigue model for the durability of glass fibre reinforced cement , 2001 .

[19]  A. A. Griffith.  The Phenomena of Rupture and Flow in Solids , 1921 .

[20]  S. Diamond,et al.  The contact zone between portland cement paste and glass “aggregate” surfaces , 1978 .

[21]  N. R. Short,et al.  Microstructural observations in new matrix glass fibre reinforced cement , 2000 .

[22]  Philip Purnell.  The durability of glass fibre reinforced cements made with new cementitious matrices , 1998 .

[23]  Phil Purnell,et al.  Interpretation of climatic temperature variations for accelerated ageing models , 2004 .

[24]  W. Lacourse,et al.  The Strength of Glass , 1972 .

[25]  L. D. Pye,et al.  Introduction to Glass Science , 1972 .

[26]  B. Proctor,et al.  The use of accelerated ageing procedures to predict the long term strength of GRC composites , 1981 .

[27]  U. F. Zackay.  High-strength Materials , 1965 .

[28]  Wenzhong Zhu,et al.  Assessment of interfacial microstructure and bond properties in aged GRC using a novel microindentation method , 1997 .

[29]  Per Freiesleben Hansen,et al.  Influence of temperature on autogenous deformation and relative humidity change in hardening cement paste , 1999 .

[30]  S. Freiman.  Fracture Mechanics of Glass , 1980 .

[31]  R. W. Nurse,et al.  Glass Fibre Reinforced Cement , 1991 .