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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.Faizrakhmanov I.I. – post-graduate student E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Khaliullin M.I. – 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 Leklou A.-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 Amiri O. – doctor of technical science, professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Polytech Nantes The organization address: BP 50609, France, Nantes, Christian Pauc st., 1
Title of the articleThe influence of the fine screenings of concrete waste on the deformation and fracture toughness of mortar
Abstract.Problem statement. The aim of this work was to study the influence of additives of fine screenings of concrete waste on the shrinkage deformation and crack resistance of mortars based on Portland cement when hardening. Results. Using standard and original methods of research studied the influence of additives of fine screenings of concrete waste: on the kinetics of heat-curing cement compositions, the nature of which is associated with the shrinkage deformations of cement stone at early stages of hardening; for cracking of the mortar shrinkage in the constrained conditions, the change of the modulus of elasticity of hardened mortar. Conclusions. The possibility of obtaining a mortar with replacement of up to 15 % of Portland cement in the binder for fine screening of concrete waste without significantly reducing the strength of the solution. It is shown that with increasing content of additives fine screenings of concrete waste in the composition of the cement compositions, a decrease in heat when hardening. It is established that the joint introduction of the additive of fine screenings of concrete waste and plasticizer provides increased fracture toughness of mortars shrinkage in cramped conditions to levels that significantly exceeds the fracture toughness of mortars without additive injection. It is shown that the introduction of a complex additive does not lead to a significant reduction in the modulus of elasticity of the mortar compared to the cement with no composition.
Keywords.screening of concrete waste, mortar, portland cement, cracking, modulus of elasticity.
For citations:Faizrakhmanov I.I., Khaliullin M.I., Leklou A.-N., Amiri O. The influence of the fine screenings of concrete waste on the deformation and fracture toughness of mortar // Izvestiya KGASU. 2017. №2(40) P.241-248.


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