The design of cementitious composites with advanced thermal properties
Апстракт
The phyllosilicate mineral pyrophyllite can be utilized in cementitious composites design to replace quartz powder and boost workability, early strengths, and refractoriness. Employed as a mineral additive or microfiller, pyrophyllite is stable at high temperatures owing to its thermal conversion into mullite.
In this study, mortar samples were prepared using andalusite as aggregate, high-alumina cement as a binder, and pyrophyllite as an additive (15%, 25%, and 35%). Compressive and flexural strengths, both at normal and elevated temperatures (samples were thermally treated at 1000°C) were tested on the samples, along with the refractoriness. The effects of pyrophyllite addition on the mineral composition, microstructure, and bonding and sintering mechanisms were studied using instrumental analytical techniques. Pyrophyllite acted as additional pozzolana during cement hydration as it formed microreinforcement
in the shape of crystalline folia within the microstructure, which improve...d the
compressive strengths of mortars. The differential thermal analysis highlighted that pyrophyllite did not negatively interfere with the cement hydration route; moreover, this mineral additive behaved as pozzolana. The investigation demonstrated that pyrophyllite additions of up to 25% can be used in cementitious composites without affecting their performance.
Кључне речи:
Sustainable raw materials / Mineral additives / Instrumental analyses / Mechanical strengthsИзвор:
Proceedings of the 20th International symposium of MASE, Skopje, Republic of North Macedonia, 2023, 1183-1188Институција/група
Institut za ispitivanje materijalaTY - CONF AU - Terzić, Anja AU - Janković, Ksenija PY - 2023 UR - http://rims.institutims.rs/handle/123456789/588 AB - The phyllosilicate mineral pyrophyllite can be utilized in cementitious composites design to replace quartz powder and boost workability, early strengths, and refractoriness. Employed as a mineral additive or microfiller, pyrophyllite is stable at high temperatures owing to its thermal conversion into mullite. In this study, mortar samples were prepared using andalusite as aggregate, high-alumina cement as a binder, and pyrophyllite as an additive (15%, 25%, and 35%). Compressive and flexural strengths, both at normal and elevated temperatures (samples were thermally treated at 1000°C) were tested on the samples, along with the refractoriness. The effects of pyrophyllite addition on the mineral composition, microstructure, and bonding and sintering mechanisms were studied using instrumental analytical techniques. Pyrophyllite acted as additional pozzolana during cement hydration as it formed microreinforcement in the shape of crystalline folia within the microstructure, which improved the compressive strengths of mortars. The differential thermal analysis highlighted that pyrophyllite did not negatively interfere with the cement hydration route; moreover, this mineral additive behaved as pozzolana. The investigation demonstrated that pyrophyllite additions of up to 25% can be used in cementitious composites without affecting their performance. C3 - Proceedings of the 20th International symposium of MASE, Skopje, Republic of North Macedonia T1 - The design of cementitious composites with advanced thermal properties EP - 1188 SP - 1183 UR - https://hdl.handle.net/21.15107/rcub_rims_588 ER -
@conference{ author = "Terzić, Anja and Janković, Ksenija", year = "2023", abstract = "The phyllosilicate mineral pyrophyllite can be utilized in cementitious composites design to replace quartz powder and boost workability, early strengths, and refractoriness. Employed as a mineral additive or microfiller, pyrophyllite is stable at high temperatures owing to its thermal conversion into mullite. In this study, mortar samples were prepared using andalusite as aggregate, high-alumina cement as a binder, and pyrophyllite as an additive (15%, 25%, and 35%). Compressive and flexural strengths, both at normal and elevated temperatures (samples were thermally treated at 1000°C) were tested on the samples, along with the refractoriness. The effects of pyrophyllite addition on the mineral composition, microstructure, and bonding and sintering mechanisms were studied using instrumental analytical techniques. Pyrophyllite acted as additional pozzolana during cement hydration as it formed microreinforcement in the shape of crystalline folia within the microstructure, which improved the compressive strengths of mortars. The differential thermal analysis highlighted that pyrophyllite did not negatively interfere with the cement hydration route; moreover, this mineral additive behaved as pozzolana. The investigation demonstrated that pyrophyllite additions of up to 25% can be used in cementitious composites without affecting their performance.", journal = "Proceedings of the 20th International symposium of MASE, Skopje, Republic of North Macedonia", title = "The design of cementitious composites with advanced thermal properties", pages = "1188-1183", url = "https://hdl.handle.net/21.15107/rcub_rims_588" }
Terzić, A.,& Janković, K.. (2023). The design of cementitious composites with advanced thermal properties. in Proceedings of the 20th International symposium of MASE, Skopje, Republic of North Macedonia, 1183-1188. https://hdl.handle.net/21.15107/rcub_rims_588
Terzić A, Janković K. The design of cementitious composites with advanced thermal properties. in Proceedings of the 20th International symposium of MASE, Skopje, Republic of North Macedonia. 2023;:1183-1188. https://hdl.handle.net/21.15107/rcub_rims_588 .
Terzić, Anja, Janković, Ksenija, "The design of cementitious composites with advanced thermal properties" in Proceedings of the 20th International symposium of MASE, Skopje, Republic of North Macedonia (2023):1183-1188, https://hdl.handle.net/21.15107/rcub_rims_588 .