About the authors
| First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address. | Stroganov V.F. – doctor of chemical sciences, professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Sagadeev E.V. – doctor of chemical sciences, professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Vahitov B.R. – post-graduate student E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Kazan State University of Architecture and Engineering The organization address: 420043, Russia, Kazan, Zelenaya st., 1 |
| Title of the article | The investigation of stability of cement-sand mortar during the exposure in the carboxylic acids medium: citric and oxalic acids |
| Abstract. | Conducted a research of the stability of a series of samples of cement-sand mortar (based on Portland cement М400 ЦЕМ II/А-П 32,5 Н and М500 ЦЕМ I 42,5 Н and with the addition of modifying agent of little functionalized carbon nanotubes «Taunit») in oxalic and citric acids modeling mediums at a temperature of 40 oС. Based on the analysis of the experimental data of comparative test of cement-sand mortar stability in modeling mediums concluded that the most destructive capability to cement-sand mortar exhibits citric acid due its chemical reactivity. It is shown the inexpediency use of individual solution of oxalic acid in the modeling processes of biodeterioration of cement-sand mortar because the formation of insoluble calcium oxalates impending the research. Obtain results allow to choose the citric acid as the component of model mixtures of carboxylic acids for further researches of processes of biodeterioration of cement-sand mortar. It is found that the introduction of the cement-sand mortar little functionalized carbon nanotubes «Taunit» does not improve the strength characteristics of cement-sand mortar. |
| Keywords. | cement-sand mortar, model tests, citric acid, oxalic acid. |
| For citations: | Stroganov V.F., Sagadeev E.V., Vahitov B.R. The investigation of stability of cement-sand mortar during the exposure in the carboxylic acids medium: citric and oxalic acids // Izvestiya KGASU. 2015. №3(33) P.153-158. |
