Does anyone have experience using nano silica with ready mix? My specific question is were Portland cement, sand and aggregate are wetted out first and then liquid ns is subsequently added on the tail end of the mix to prevent agglomeration?
Any help, advice or publication on this matter would be most useful.
Regards,
Bill Harrill
Nano Silica can be used with ultrasonication technique which is going to minimize the agglomeration of the silica.
When nanoparticles are used for concrete, they are often dispersed in water (with or without dispersants) first to form a nanosolution, and the nanosolution is then used as mixing water to be mixed with cementitious materials. Thus, nanoparticle dispersion for concrete is mostly a solid-liquid dispersion. To separate agglomerated solid particles in a liquid, dispersion is to generate new interfaces between an inner surface of the liquid medium and the surfaces of the dispersed particles. When a repulsive force overcomes the van der Waals’ attraction and hydrophobic interaction between these particles, the system will have a good dispersibility and physical stability. This principle has been used to govern quality of dispersions in both nanoparticle manufacturing process and applications.
to produce concrete, It's better to make nano solution and after that you can use it as mixing water to mix with cement.
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