This paper provides an overview of the effects of ripening the olivine nano-silica to form particles with a lower specific surface area for optimal use in high performance concrete. The nano-silica was ripened using a hydrothermal treatment in a mixed batch reactor at 90 C, pH ranging from 8 to 10 and a silica weight percentage of three and six percent. The specific surface area of the olivine nano-silica can be reduced by 62 percent by Ostwald ripening in 22 hours. This reduction corresponds to a 80 percent drop of the micropore surface area and a 57 percent drop of the external surface area. The different hydrothermal conditions did not affect the final specific surface area at the equilibrium. However, the use of a high energy mixer reduced the specific surface area by 52 percent in only five minutes. Despite the reduction in specific surface area, the aggregates of the original olivine nano-silica are not dissolved during the ripening process.
|Title of host publication||Proceedings of the international conference nanomaterials: applications and properties (NAP2012), september 17 2012 - september 22 2012, Crimea, Ukraine|
|Publisher||Sumy State University|
|Publication status||Published - 2012|
|Event||conference; nanomaterials: applications and properties (NAP2012); 2012-09-17; 2012-09-22 - |
Duration: 17 Sep 2012 → 22 Sep 2012
|Conference||conference; nanomaterials: applications and properties (NAP2012); 2012-09-17; 2012-09-22|
|Period||17/09/12 → 22/09/12|
|Other||nanomaterials: applications and properties (NAP2012)|
Griend, van de, M. C., Lazaro, A., & Brouwers, H. J. H. (2012). The Effect of Hydrothermal Treatment on Olivine Nano-Silica. In Proceedings of the international conference nanomaterials: applications and properties (NAP2012), september 17 2012 - september 22 2012, Crimea, Ukraine (pp. 01PCN31-1/3). Sumy State University.