1. Properties of Ternary Cement Pastes with Nanosilica and Rice Husk Ash
- Author
-
Moisés Frías Rojas, Paulo C. Morais, Daniel da Silva Andrade, Anne Neiry de Mendonça Lopes, João Henrique da Silva Rêgo, and Maria José de Souza Serafim
- Subjects
Cement ,Portland cement ,Materials science ,Silica fume ,law ,Metallurgy ,General Materials Science ,Building and Construction ,Ternary operation ,Husk ,Civil and Structural Engineering ,law.invention - Abstract
The present study reports on the pioneering addition of rice husk ash (RHA) and silica fume (SF) into portland cement-based (PC-based) materials, combined with nanosilica (NS), aiming to assess the impact of the RHA on the mechanical and microstructure properties of ternary mixtures. Pastes were prepared to perform compressive strength tests, thermal analysis (DTA/TG), infrared spectroscopy, and mercury porosimetry. The highest reduction in the calcium hydroxide index (CH.I) and the highest calciumsilicate- hydrate (C-S-H) formation are found in the PC-based ternary mixture containing NS plus SF and NS plus RHA after 91 days of hydration. In line with the aforementioned trends, the ternary mixtures containing NS show the highest compressive strength values and reduction of mean diameter of porous. Indeed, we found strong evidence of synergistic effect in ternary mixtures incorporating NS plus RHA or SF, thus supporting their use in fabrication of cementitious materials.
- Published
- 2020
- Full Text
- View/download PDF