Thermal behaviour of concretes with micro silica addition
Abstract
A comparative study of several concrete composites with different quantities of micro silica was conducted. The effect that micro silica addition has on the behavior of concrete was discussed. The experimental program implied production of "referent" concrete composite based on Portland cement and river sand, and concretes with 5, 10, and 15 wt.% addition of micro silica. Micro silica was used as micro filler in the concrete mass. The influence of this additive on the concrete mechanical properties and on its thermal behavior was investigated. This research highlighted the role that fine micro silica particles have in improvement of composite microstructure packing, the decrease of the porosities values and enhancement in the compressive strength due to the decrease in pore size. The thermal behavior of the concretes was studied at temperatures ranging from ambient to 1100°C as adopted maximum. Mechanisms of thermally induced processes were observed by differential thermal analysis, at... 10°C min-1 heating rates, and by thermo gravimetric analysis. The variations in concretes performances were discussed with support of scanning electron
microscope imagining and X-ray diffraction results. The composites with addition of micro silica exhibited properties that met the requirements for the concretes suitable for use in severe conditions and environments.
Keywords:
concrete composites / silica / Portland cement / thermal behaviourSource:
3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry 25-28 August 2015, Ljubljana, Slovenia: Book of Abstracts, 2015, 271-271Publisher:
- Ljubljana : Central and Eastern European Committee for Thermal Analysis and Calorimetry
Funding / projects:
Institution/Community
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - CONF AU - Terzić, Anja AU - Obradović, Nina AU - Miličić, Ljiljana AU - Radojević, Zagorka PY - 2015 UR - https://dais.sanu.ac.rs/123456789/760 AB - A comparative study of several concrete composites with different quantities of micro silica was conducted. The effect that micro silica addition has on the behavior of concrete was discussed. The experimental program implied production of "referent" concrete composite based on Portland cement and river sand, and concretes with 5, 10, and 15 wt.% addition of micro silica. Micro silica was used as micro filler in the concrete mass. The influence of this additive on the concrete mechanical properties and on its thermal behavior was investigated. This research highlighted the role that fine micro silica particles have in improvement of composite microstructure packing, the decrease of the porosities values and enhancement in the compressive strength due to the decrease in pore size. The thermal behavior of the concretes was studied at temperatures ranging from ambient to 1100°C as adopted maximum. Mechanisms of thermally induced processes were observed by differential thermal analysis, at 10°C min-1 heating rates, and by thermo gravimetric analysis. The variations in concretes performances were discussed with support of scanning electron microscope imagining and X-ray diffraction results. The composites with addition of micro silica exhibited properties that met the requirements for the concretes suitable for use in severe conditions and environments. PB - Ljubljana : Central and Eastern European Committee for Thermal Analysis and Calorimetry C3 - 3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry 25-28 August 2015, Ljubljana, Slovenia: Book of Abstracts T1 - Thermal behaviour of concretes with micro silica addition SP - 271 EP - 271 UR - https://hdl.handle.net/21.15107/rcub_dais_760 ER -
@conference{ author = "Terzić, Anja and Obradović, Nina and Miličić, Ljiljana and Radojević, Zagorka", year = "2015", abstract = "A comparative study of several concrete composites with different quantities of micro silica was conducted. The effect that micro silica addition has on the behavior of concrete was discussed. The experimental program implied production of "referent" concrete composite based on Portland cement and river sand, and concretes with 5, 10, and 15 wt.% addition of micro silica. Micro silica was used as micro filler in the concrete mass. The influence of this additive on the concrete mechanical properties and on its thermal behavior was investigated. This research highlighted the role that fine micro silica particles have in improvement of composite microstructure packing, the decrease of the porosities values and enhancement in the compressive strength due to the decrease in pore size. The thermal behavior of the concretes was studied at temperatures ranging from ambient to 1100°C as adopted maximum. Mechanisms of thermally induced processes were observed by differential thermal analysis, at 10°C min-1 heating rates, and by thermo gravimetric analysis. The variations in concretes performances were discussed with support of scanning electron microscope imagining and X-ray diffraction results. The composites with addition of micro silica exhibited properties that met the requirements for the concretes suitable for use in severe conditions and environments.", publisher = "Ljubljana : Central and Eastern European Committee for Thermal Analysis and Calorimetry", journal = "3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry 25-28 August 2015, Ljubljana, Slovenia: Book of Abstracts", title = "Thermal behaviour of concretes with micro silica addition", pages = "271-271", url = "https://hdl.handle.net/21.15107/rcub_dais_760" }
Terzić, A., Obradović, N., Miličić, L.,& Radojević, Z.. (2015). Thermal behaviour of concretes with micro silica addition. in 3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry 25-28 August 2015, Ljubljana, Slovenia: Book of Abstracts Ljubljana : Central and Eastern European Committee for Thermal Analysis and Calorimetry., 271-271. https://hdl.handle.net/21.15107/rcub_dais_760
Terzić A, Obradović N, Miličić L, Radojević Z. Thermal behaviour of concretes with micro silica addition. in 3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry 25-28 August 2015, Ljubljana, Slovenia: Book of Abstracts. 2015;:271-271. https://hdl.handle.net/21.15107/rcub_dais_760 .
Terzić, Anja, Obradović, Nina, Miličić, Ljiljana, Radojević, Zagorka, "Thermal behaviour of concretes with micro silica addition" in 3rd Central and Eastern European Conference on Thermal Analysis and Calorimetry 25-28 August 2015, Ljubljana, Slovenia: Book of Abstracts (2015):271-271, https://hdl.handle.net/21.15107/rcub_dais_760 .