Abstract
ABSTRACTThis paper presents an experimental study of the effects of surface modification and fibre types on the stabilisation of kaolin slurry. A pre-mixed solution of cationic surfactant – cetyltrimethylammonium chloride (CTAC), selected after preliminary screening based on the knowledge of the substrate, have been used for the surface modification of kaolin prior to stabilisation with different types of synthetic polypropylene (PP) fibres. The results show an improvement in the shearing resistance of kaolin when stabilised with different types, proportions, and lengths of fibres. At higher fibre content, there is an increase in the shearing resistance of the fibre-stabilised kaolin composites for the three categories of fibres tested. Furthermore, the shearing resistance of the CTAC-PP fibre composites converges as the confining stress increases from 160kPa to 480kPa. In general, the shearing resistance of surface modified kaolin stabilised with 5% fibre length is slightly higher than corresponding composites containing unmodified kaolin.
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