| Summary: | The application of nano materials in cement by replacement method in concrete is becoming a trend in cement research. The utilisation of nano silica, nano alumina, titanium oxide and others are proven to enhance properties of concrete. The major effect of nano materials is its size in which it contributes to the packing theory due to increase in the surface area. Nano kaolin which comes from kaolin, was tansformed to the nano form by using high energy milling. The process of developing nano kaolin by using high energy milling is referred to process 'top to bottom' approach in nano processing technique. In this research, the nano kaolin will be used as an additive in cement by 7% weight of cement. Four (4) cement replacement materials catered by using metakaolin on weight basis from 0, 10%, 20% and 30% will also be adopted. To determine the fresh state, cement paste contains nano kaolin and metakaolin are tested its standard consistency and setting time. The effect of the inclusion of the nano kaolin as additive in cement paste that also contains metakaolin as cement replacement material will be investigated. It was found the inclusion of 7% nano kaolin increases the water demand of the cement paste level of metakaolin replacement. In addition to that, the setting time namely initial and final set was been delayed as compared to that of plain OPC. The nano particles of nano kaolin and also finer particles of metakaolin increase the surface area and refining the internal structure of cement paste which reduce the flow capabilities of cement paste containing nano kaolin and metakaolin. © (2014) Trans Tech Publications, Switzerland.
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