Цвет: C C C
Изображения Вкл. Выкл.
Обычная версия сайта

Преподаватели и сотрудники

Кривобородов Юрий Романович

Кривобородов Юрий Романович

Занимаемые должности

Профессор (Кафедра химической технологии композиционных и вяжущих материалов)





Сайт https://muctr.ru
Уровень образования Высшее


Преподаваемые дисциплины

Специальные технологии производства вяжущих материалов

Современные проблемы химической технологии вяжущих материалов

Химическое сопротивление неметаллических материалов

Учёная степень

Доктор технических наук

Учёное звание Профессор
Наименование направления подготовки и (или) специальности

Химическая технология вяжущих материалов

Общий стаж работы 40 лет (с 15.08.1978)
Стаж работы по специальности 25 лет (с 01.09.1993)


Krivoborodov Y. R., Samchenko S. V., Kouznetsova T. V. Chemistry composition and properties of sulfated cements // Proceedings 2nd International Workshop Durability and Sustainability of Concrete Structures (DSCS-2018). — SP-326. — American Concrete Institute Michigan, USA, 2018. — P. 27.1–27.6. The paper presents the compositions and properties of sulfated clinkers; and, the cements based upon them. The conditions of formation of sulfated minerals such as calcium sulfoaluminate, sulfoferrite and sulfoalu-mioferrite are considered. The main physical and chemical characteristics of sulfated minerals are presented. Technological peculiarities of production of clinkers, which have sulfated minerals, are studied. The proper-ties of cements that are based on various sulfated clinkers are shown. Consideration is given to the possibili-ties of using these clinkers for production of expanding, self-stressing, rapid-setting, fast hardening, corrosion-resistant, and oil-well cements. Examples of their usage both in construction and in other industries is discussed.

Effective ecological building materials based on activated ash-cement mixtures / E. Potapova, Y. Krivoborodov, S. Samchenko, T. Kouznetsova // 18 International Multidisciplinary scientific Geoconference SGEM 2018, 2 July – 8 July 2018, Albena, Bulgaria. — Vol. 18 of 26. SECTION GREEN BUILDINGS TECHNOLOGIES AND MATERIALS . — "Alexander Malinov" Sofia, Bulgaria,, 2018. — P. 135–142. [ DOI ]

Krivoborodov Y. R., Samchenko S. V. Minerals of expansive and non-shrinkage sulphomineral cements // 20. Internationale Baustofftagung. — Tagungsband 2. — F.A. Finger - Institut für Baustoffkunde Weimar, Bundesrepublik Deutschland, 2018. — P. 2–443–2–449. Usually to obtain expansive cements sulphoaluminate clinker or mix aluminate clinker with calcium sulphates (gypsum, hemihydrate, anhydrate) are used. For these cements ettringite is an important hydration product and reaction kinetics of this phase plays an important role in determinаting performance. The alternative aluminate phases may be ferrite containing ones. This paper deals with the composition and properties of solid solution of calcium sulphoaluminate, sulphoferrite and sulphoaluminoferrite cements. It was studied an influence of calcium sulphate on structure and properties of calcium aluminate and ferrite phases, and their stability under high temperatures. Beside that the properties of cements containing these phases were studied. The investigation of hydration and properties of sulphomineral cements shows that ettringite and its analogies are formed thus providing expansion and compression of cement stone. Degree of expansion and self-stressing of cement stone depends not only on composition of sulphated minerals but on ratio and types of clinkers. The higher expansion is reached by the use of high alite containing Portland cement clinker together with sulphoaluminate or sulphoalumoferrite one, the lower expansion is reached by addition of sulphoalumoferrite and sulphoferrite clinkers. These cements are classified as selfstressing, expansive or shrinkage-compensating ones de-pend on the degree of their expansion after 28 days of curring.

Samchenko S. V., Krivoborodov Y. R. Properties of aluminate cement based on alumina-containing slag // 20. Internationale Baustofftagung. — Tagungsband 2. — F.A. Finger - Institut für Baustoffkunde Weimar, Bundesrepublik Deutschland, 2018. — P. 2–461–2–468. Nowadays there is paid a lot of attention to factory waste comprising aluminium oxide because of their usage allows to reduce the influence on the environment. Carbon dioxide emissions can be decrease by using aluminothermic slag and used catalysts for purification sulfur from oil products. Ratio of aluminothermic slag and used catalysts for purification sulfur from oil products in raw stock was researched for different compositions of aluminate clinkers. As a result, in row stocks containing aluminium dioxide varies from 85% to 30% for obtaining high and low aluminate clinkers. Clinkers were making by electric-arc melting at temperature 1600 оС. There was found a difference in mineral composition under conditions fast and slow cooling aluminate melts. In case of fast cooling main phase was calcium bialuminate and high glass-like phase content. In other side, clear crystallization of all minerals calcium monoaluminate and calcium bialuminate, magnesia spinel was observed, and the main phase was calcium monoaluminate.

Krivoborodov Y. R., Samchenko S. V., Kuznetsova T. V. Structural changes in refractory calcium aluminate cement concrete // Refractories and Industrial Ceramics . — 2018. — Vol. 59, no. 2. — P. 151–155. The influence of both organic and inorganic additives to calcium aluminate cement on the processes of hydration and structure formation of concrete both at normal and elevated temperatures is investigated here. The results of investigating phase transformations in hardened calcium aluminate samples during heating from 20 to 900oC are given. The structure change mechanism and the reasons for the reduction of the strength of concrete under the influence of high temperatures are described. [ DOI ]