Glass Fibre Reinforced Gypsum

In several applications, the Glass Fibre Reinforced Gypsum (GFRG) may replace the glass fibre cement composites, which, in spite of many attempts and techniques, have more or less limited durability (cf. Section 5.3). It is lightweight with a density between 1600 and 1800 kg/m, may be easily adapted to various shapes, is inexpensive and has flexural strength between 20 and 30 MPa and tensile strength 8-10 MPa. 

Figure 3.8 Modulus of rupture for glass fibre reinforced gypsum specimens as a function of fibre content, after Ali and Grimer (1969).

Table 3.2 Glass fibre reinforced gypsum compositions...

Source Bijen, J. and Van den Plas, C. (1992) Polymer Modified Glass fibre Reinforced Gypsum, London Chapman and Hall/Spon. 

Ali, M. A., Grimer, E J. (1969) Mechanical properties of glass-fibre reinforced gypsum , Journal of Materials Science, 4(5) 389-395. 

Bijen, J., Van den Plas, C. (1992) Polymer modified glass fibre reinforced gypsum , in Proc. Int. Workshop on HPFRCC, H. W. Reinhardt and A. E. Naaman eds, RlLEM/ACl, Mainz, 23-26 June 1991, London Chapman and Hall/Spon, pp. 100-15. 

A.J. Majumdar, Glass fibre reinforced cement and gypsum products, Philos. Trans. R. Soc. London, A 319,1970, pp. 69-78. 

Creep tests performed on gypsum specimens reinforced with glass fibres by Bijen and van den Plas (1992) have shown similar behaviour to that of cement-based concretes. 

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