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. | Borovskikh I.V. – candidate of technical sciences, senior lecturer E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Morozov N.M. – candidate of technical sciences, associate professor 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 | Increase of durability of basalt fiber cement concretes |
| Abstract. | The application of the cement concretes fibers of different types allows you to significantly increase their physical-mechanical characteristics. Basalt fiber exceeds steel on the strength and due to the small diameter of a fiber has a much greater specific surface adhesion of the cement stone, than steel having chemical affinity with him. However, the possibility of the use of basalt fiber in cement systems in many respects depends on the resistance of fibers to the action of the products of the cement hydration. The destruction of the fiber surface occurs when interacting with its face in the process of hardening of hydrated lime. Therefore it is suggested to reduce the number of CaO in the cement system and, consequently, increase resistance of basalt fiber. When you add in cement 10 % micro silica untied lime stays in the system of not more than 7 days in the amount of up to 5 g per 100 g of the source of Portland cement. The introduction of micro silica in the cement system reduces the pH of aqueous extract concerning the composition without micro silica to 3 %, which says about decreasing in the system of the content of the CaO, and better preservation of basalt fiber. This is confirmed by the absence of changes in the pH of the aqueous extracts of compounds with fibers and without fiber in formulations that contain MK-85 in all periods of hardening of cement stone. |
| Keywords. | Basalt fiber, cement, concrete, alkaline resistance, micro silica. |
| For citations: | Borovskikh I.V., Morozov N.M. Increase of durability of basalt fiber cement concretes // Izvestiya KGASU. 2012. №2(20) P.160-165. |
