Abstract
Abstract Recently the impact of nano-silica on concrete-cementary properties and microstructure has been paying special attention. Previous experiments have shown the advantage of using nano-silica due to its pozzolanic reaction in construction materials. However most of the previous results are primarily focused on the performance of composite cement (cement paste/mortar or concrete), there is a lack of inquiry into the impact of nano-silica addition on the deterioration of fibre reinforcement. In this study, an analysis will be carried out on the embedded fibre to test its degradation as determined by its tensile properties. The effect of adding colloidal silica (CS) on the tensile strength of embedded coconut coir was tested with 0%, 1%, 2%, 3% and 4% w/w. The strength enhancement of embedded fibre with CS inclusion, due to the CS pozzolanic reaction, showed an overall greater increase than that without CS addition. With rising CS content, the fibre strength was increased by up to 2%, exceeding 2%, fibre showed reduction in strength. Typical fibre surface fracturing was specifically seen for cement-embedded fibre with an extra 3% and 4% CS.
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