Nano-silica added to Portland cement

For a controlled particle size distribution, nano-silica was added to three different cements. The chemical and mineralogical compositions of the cements were characterized by fluorescence X-ray diffraction. granulometric distributions nano-silicas obtained laser granulometry dynamic lightning scattering. specific surface area raw materials determined gas adsorption. effect type cement on rheological behavior evaluated rotational rheometry. mechanical performance investigated through compression strength. microstructural analysis performed scanning electron microscopy. water demand consumption dispersant increases according content. reduction in inter-particle separation, agglomeration led an increase viscosity suspension. directly affected Microstructural showed that changed from layered adsorbed structure, porous or agglomerated structure.