Evaluation of rheological properties of mortar with TiO2 addition
Adding TiO2 to coating mortars is carried out to promote self-cleaning through photocatalytic activity. However, this addition influences the workability of the mortar and, consequently, the application stage as the TiO2 used can present a large number of fine particles and a high surface area, incr...
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| Formato: | Online |
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ANTAC - Associação Nacional de Tecnologia do Ambiente Construído
2021
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| Acceso en línea: | https://seer.ufrgs.br/ambienteconstruido/article/view/105816 |
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ojs-article-1058162021-08-09T14:42:54Z Evaluation of rheological properties of mortar with TiO2 addition Dantas, Sérgio Roberto Andrade Lima, Francisco Jordão Nunes de Romano, Roberto Cesar de Oliveira Pileggi, Rafael Loh, Kai Photocatalytic mortar; TiO2; squeeze flow; rheology; yield. Adding TiO2 to coating mortars is carried out to promote self-cleaning through photocatalytic activity. However, this addition influences the workability of the mortar and, consequently, the application stage as the TiO2 used can present a large number of fine particles and a high surface area, increasing the demand for mixing water, requiring consistency adjustments before coating. In this work, three mortars (two with the addition of different types of TiO2 and one reference) were developed on a laboratory scale to maintain similar workability, using the flow table test. The amount of kneading water was changed to maintain a spread of 220 ± 10 mm and the content of air-entrained was kept constant, around 25%. The mortars were evaluated using the squeeze flow method. Then, a blind test was performed to assess the mason sensitivity during handling and application of the coating, and all mortars were considered similar. However, the yield of the compositions with TiO2 addition was lower compared to the reference composition, making it possible to explain the results based on the physical parameters of the formulations and with a more in-depth analysis of the rheological indices obtained by the squeeze flow test. ANTAC - Associação Nacional de Tecnologia do Ambiente Construído FIPT (IPT) and CAPES 2021-08-09 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://seer.ufrgs.br/ambienteconstruido/article/view/105816 Ambiente Construído; v. 21, n. 4 (2021); 7-21 Ambiente Construído; v. 21, n. 4 (2021); 7-21 Ambiente Construído; v. 21, n. 4 (2021); 7-21 1678-8621 1415-8876 eng https://seer.ufrgs.br/ambienteconstruido/article/view/105816/63996 Direitos autorais 2021 Ambiente Construído https://creativecommons.org/licenses/by/4.0 |
| institution |
Universidade Federal do Rio Grande do Sul |
| collection |
OJS |
| language |
eng |
| format |
Online |
| author |
Dantas, Sérgio Roberto Andrade Lima, Francisco Jordão Nunes de Romano, Roberto Cesar de Oliveira Pileggi, Rafael Loh, Kai |
| spellingShingle |
Dantas, Sérgio Roberto Andrade Lima, Francisco Jordão Nunes de Romano, Roberto Cesar de Oliveira Pileggi, Rafael Loh, Kai Evaluation of rheological properties of mortar with TiO2 addition |
| author_facet |
Dantas, Sérgio Roberto Andrade Lima, Francisco Jordão Nunes de Romano, Roberto Cesar de Oliveira Pileggi, Rafael Loh, Kai |
| author_sort |
Dantas, Sérgio Roberto Andrade |
| title |
Evaluation of rheological properties of mortar with TiO2 addition |
| title_short |
Evaluation of rheological properties of mortar with TiO2 addition |
| title_full |
Evaluation of rheological properties of mortar with TiO2 addition |
| title_fullStr |
Evaluation of rheological properties of mortar with TiO2 addition |
| title_full_unstemmed |
Evaluation of rheological properties of mortar with TiO2 addition |
| title_sort |
evaluation of rheological properties of mortar with tio2 addition |
| description |
Adding TiO2 to coating mortars is carried out to promote self-cleaning through photocatalytic activity. However, this addition influences the workability of the mortar and, consequently, the application stage as the TiO2 used can present a large number of fine particles and a high surface area, increasing the demand for mixing water, requiring consistency adjustments before coating. In this work, three mortars (two with the addition of different types of TiO2 and one reference) were developed on a laboratory scale to maintain similar workability, using the flow table test. The amount of kneading water was changed to maintain a spread of 220 ± 10 mm and the content of air-entrained was kept constant, around 25%. The mortars were evaluated using the squeeze flow method. Then, a blind test was performed to assess the mason sensitivity during handling and application of the coating, and all mortars were considered similar. However, the yield of the compositions with TiO2 addition was lower compared to the reference composition, making it possible to explain the results based on the physical parameters of the formulations and with a more in-depth analysis of the rheological indices obtained by the squeeze flow test. |
| publisher |
ANTAC - Associação Nacional de Tecnologia do Ambiente Construído |
| publishDate |
2021 |
| url |
https://seer.ufrgs.br/ambienteconstruido/article/view/105816 |
| work_keys_str_mv |
AT dantassergiorobertoandrade evaluationofrheologicalpropertiesofmortarwithtio2addition AT limafranciscojordaonunesde evaluationofrheologicalpropertiesofmortarwithtio2addition AT romanorobertocesardeoliveira evaluationofrheologicalpropertiesofmortarwithtio2addition AT pileggirafael evaluationofrheologicalpropertiesofmortarwithtio2addition AT lohkai evaluationofrheologicalpropertiesofmortarwithtio2addition |
| _version_ |
1709370610990186496 |