Abstract
The properties of cement composites made from alkali-resistant Cem-FIL glass fibres and Portland cement modified by styrene-butadiene rubber (SBR) latex and kept in three different environments for up to 15 years are described. It is shown that the long-term weatherability of GRC composites is improved by the addition of SBR, the embrittlement of the material taking place at a slower rate in the presence of the polymer. In air storage SBR-modified GRC has remained strong and tough up to the period of study but in continuously wet environments the polymer did not reduce the extent of long-term strength loss in GRC in any significant way. A proportion of the cement in GRC modified by SBR can be replaced by pulverized fuel ash without sacrificing the improvements in the long-term weathered strength of the composite brought about by polymer addition.
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