Archive - Известия Казанского государственного архитектурно-строительного университета.

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First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address.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 Morozova N.N. – 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 articleModified concrete durability research for monolithic construction
Abstract.The durability of concrete depends on its composition and operating conditions of concrete and reinforced concrete structures. Resistance of concrete penetration of aggressive substances, depending on the density, is important in the operation of various types of concrete. Superplasticizers, can not only significantly reduce the water-cement ratio, which reduces the capillary porosity of the concrete, but also reduce the shrinkage strain. After one day of hardening cement paste with superplasticizers based on polycarboxylate contraction is smaller in 3 times, and after 7 days in 2 times. Reduction of the contraction reduces shrinkage deformation occurring in the cement stone and increase its strength, which ultimately increases durability of concrete. Furthermore, the use of such supplements significantly reduces water absorption and increases water resistance and frost resistance of concrete. One of the important and the «hidden» causes of decline in durable concrete is their internal (alkaline) corrosion. Studies have shown that the use of the type series of modifiers can significantly slow down the concrete manifestation of alkaline corrosion. Durability of the modified concrete depends not only on the type of additives, but also on the type of cement and quality aggregates. Choosing modifiers must be justified as regards their impact on the performance of concrete in the vintage age, and in the later stages of hardening in actual use.
Keywords.Durability of concrete, alkaline corrosion, air entrainment, superplasticizers, frost resistance.
For citations:Morozov N.M., Morozova N.N. Modified concrete durability research for monolithic construction // Izvestiya KGASU. 2012. №4(22) P.312-318.

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