A test method for the strength of glass fibres in cement

The development of glass fibre reinforced cements and concretes (GRC) has been dependant on effective methods of assessing the strength retention of the alkali resistant glass fibres in a cement environment. The strand-in-cement (SIC) test, described in detail in this paper, has proved to be a reliable test method. The glass fibres are tested in a practical commercially available format, in conditions similar to that in a practical cementitious composite. The changes in fibre strength observed in SIC specimens have been shown to relate directly to changes in strength of GRC composites. (Author/TRRL)