The Effect of nanosilica on the properties of pumice incorporated blended cement

Dündar, Burak
Because of the high energy requirement and high CO2 amount as a waste of burned CaCO3 present in raw material, Portland Cement production is also responsible from the CO2 emission among other responsible industries. In order to reduce such an energy consumption, use of portland cement clinker is aimed to be reduced in construction industry. For this aim, use of materials called pozzolan has become widespread. Through the use of pozzolans, the amount of Portland Cement Clinker in structural concrete can be reduced. Mechanisms of pozzolan in mixtures are reaction of the pozzolan with the product of cement hydration and producing additional products that gives binding property to the paste. However, early age mechanical properties of the mixtures containing pozzolan are lower than that of the mixtures with no pozzolan. So, construction periods can be elongated because of the delays in form removal. In this research study, early age strength values and some physical/chemical properties of the portland cement, pozzolan, and nanomaterial mixtures at different ratios have been examined on both paste and mortar specimens. Nanosilica and pumice powder have been used as nanomaterial and pozzolan respectively. Early age compressive strength values of the mixtures containing nanosilica have been observed as higher than that of mixtures not containing nanosilica. It is observed that 3% of nanosilica addition increased the early age compressive strength of natural pozzolan blended cements. 
Citation Formats
B. Dündar, “The Effect of nanosilica on the properties of pumice incorporated blended cement,” M.S. - Master of Science, Middle East Technical University, 2016.