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Alexandr Vladimirovich Usherov-Marshak

Alexandr Vladimirovich Usherov-Marshak
Kharkiv national university of civil engeniring and architecture · Department of Physical and Chemical Mechanics and Technologies of Building Materials and Products

Doctor of Engineering

About

57
Publications
5,666
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70
Citations

Publications

Publications (57)
Article
This paper considers the key ideas and results of temperature-time monitoring of cement hardening in the presence of admixtures. We demonstrate that the proposed method is highly informative for quantitatively assessing the effectiveness of admixtures in the technologies of cement and concrete.
Article
Using concrete science as an example, we discuss priority issues in and principles and methodology of creating information terminological systems for inorganic materials science. The development of such systems builds on a typological approach, terminological field indexing methods, etc.
Article
Based on thermokinetic data on the hydration of mono- and polymineral binders in the presence of chemical admixtures, the conclusion is made that the admixtures have a selective effect on adsorption, wetting, nucleation, crystallization, and other stages of the hardening process. A correlation is revealed between the thermokinetic characteristics o...
Article
This paper discusses the problems of ensuring compatibility and functionality of admixtures with cements. We analyze the methodology—developed on the principles of continuity and superpositions—of functional kinetic analysis of the effect of admixtures on the hardening of cement systems using calorimetric monitoring of early hardening stages and il...
Article
Full-text available
The paper presents the results of research on the infl uence of granulated blast furnace slag, natural pozzolana [superzeolite], and limestone powder on the performance of multi-component cements. It was found that the synergistic combination of mineral additives of different genesis, taking into account the infl uence of the particle size dist...
Chapter
The results of mechanical activation effect using vibro-milling on the properties of hardened Portland cement were presented. Comprehensive assessment of particle size distribution by volume and surface area of ordinary and activated Portland cement was carried out. The heat of hydration, initial and final setting times of the cement pastes, rheolo...
Article
Full-text available
The foundations of wind farms are massive structures that require temperature control of concrete hardening during their construction. This is due to the need to ensure crack resistance and specific operating conditions of engineering networks located in the body of the structure. The work describes a comprehensive study of the foundations construc...
Article
Full-text available
Розглядається проблема забезпечення ефективності рецептурно-технологічних рішень у сучасних бетонах. Констатується експоненціальний характер розвитку технології бетону, обумовлений зростанням числа компонентів, особливо в цементах і добавках. Обґрунтована доцільність вирішення задач оцінювання ефективності добавок у багатокомпонентних цементних сис...
Book
Full-text available
Наукоемкость, многокомпонентность, функциональность, совместимость, технологичность, эффективность, информативность — признаки бетоноведения и технологии бетона нашего времени. Методология обеспечения заданных параметров, температурно-временной мониторинг твердения бетона с добавками, адекватный понятийно-терминологический аппарат — объекты внимани...
Presentation
Full-text available
ИС ТВМ это удобная система для мониторинга ранних стадий твердения цементных систем с добавками. Является эффективным инструментом в различных исследованиях, который дает возможность наблюдать за интенсивностью реакций и регулировать их. Ускоряет поиск эффективных добавок при подборе составов бетонов, растворов и сухих строительных смесей. Незамени...
Conference Paper
Full-text available
Development of calorimetric method of time-temperature monitoring of hardening cement with admixtures, which may allow evaluating the effectiveness of their use in various technologies of concrete, is discussed.
Book
Full-text available
Приводятся результаты разработки температурно-временного мониторинга параметров твердения цементов, строительных растворов и бетонов методами калориметрии. На примере количественной оценки эффективности влияния добавок на процессы твердения показаны возможности применения разработанного метода с целью принятия или корректировки технологических реше...
Article
Full-text available
The review of literary data on the possibilities given by the method of Differential Scanning Calo-rimetry (DSC) in studying of building materials has been cited. The specialities featured by parameters of cement hydration (thermodynamic characteristics) in analysis and prediction of the cement stone and concrete properties has been emphasised. Cem...
Book
Full-text available
Содержание книги построено на автобиографических «Записках» – вос- поминаниях о более чем полувековом развитии бетона – главного строитель- ного материала человечества – на фоне событий отечественной истории. Автор, представитель международно известной Харьковской научной школы строительного материаловедения, – непосредственный участник многих фун-...
Article
This paper examines the main principles of a phenomenological approach to building materials development in terms of the conceptual—cognitive system property—composition—structure—process based on Kurnakov’s physicochemical analysis.
Book
Full-text available
В обзорной информации приведены основные положения и требования интегрированных европейских норм на бетон, его компоненты, методы испытаний и т. д., вводимых в действие в Украине и других странах СНГ в настоящее время. Сведения из европейских норм представлены в виде таблиц и некоторых комментариев.
Article
Full-text available
In the paper importance of isothermal calorimetry in chemistry and technology of cement and concrete is presented. Other methods of cement heat of hydration measurements were standarized earlier and in 2003 in the European standard EN 196-8, 9. The isothermal calorimetry enables to determine the kinetic parameters of cement hydration using thermoki...
Book
Full-text available
В настоящее издание включены статьи и доклады как оригинальные, так и обзорного характера, подготовленные известными специалистами по добавкам в бетон из Украины, России и Польши – участниками VII Международной научно-практической конференции «Дни современного бетона».
Article
A procedure is proposed for evaluating the efficiency of chemical and mineral admixtures in early cement hydration with the use of calorimetric data and with allowance made for the selective effect of admixtures on the hardening process. The concepts of admixture efficiency and admixture–cement compatibility are formulated and are shown to be of pr...
Book
Full-text available
Building material science, as the applied science uses an arsenal of exploratory means and methods of fundamental sciences at the decision of chemical­technological problems of regulation of compositions, of structure, processes and properties of cements and concrete. Calorimetric methods of studying of heat ef­fects as a result of reactions, struc...
Article
This report deals with practical and experimental studies of the effects of frost attack on hardening cement stone and concrete. The basic component of concrete, cement stone, is a typical capillary-porous material formed from solid, liquid and gaseous phases. The level of knowledge on the effects of frost attack on cement stone and concrete harden...
Article
The specific features of ice formation during freezing of hardening binders are considered as dependent on the structural characteristics. The theoretical grounds for the relationship between the crystallization point of the pore-confined liquid and the pore size are discussed. The possible mechanisms of frost-caused cement stone destruction and th...
Article
The capillary porosity of clinker phases, i.e. 3CaOSiO2, β2CaOSiO2, 3CaOAl2O3 and 4CaOAl2O3Fe2O3, at the early stages of hydration has been studied by the methods of Differential Scanning Calorimetry and nitrogen adsorption (BET). It was established that pores of 3–70 nm were formed during the hydration of 3CaOSiO2 and the maximum of their distrib...
Article
Heat release in the course of curing is correlated with the strength of the concrete for cements ranging in basicity from 1.34 to 3.16. During hydration of cements, heat release is proportional and the strength of the concrete is related inversely to cement basicity.
Article
This paper presents results of thermochemical and thermokinetic studies of the hydration of portland cement, alkaline cements with mineral additives and slag alkaline binder. The influence of the modulus of basicity of the binders on the thermochemical and thermokinetic characteristics of hydration was estimated.
Article
This paper deals with effect of solid phase basicity on heat evolution of different cementitious materials varying in basicity between 3.16 and 1.34. A differential microcalorimeter was used for thermokinetic analysis, and the heat evolution was examined with regard to non-isothermal conditions. The experimental results allowed us to conclude that,...
Article
The specific features of ice formation were studied upon the freezing of the hardening cement stone. The phase transitions of water were analyzed during the variation of some parameters, such as the type and concentration of chemical additives, cooling rate, moisture content, and type of the binder used.
Article
The first attempt to classify the structure of a typical capillary-porous material (cement stone) with allowance made for specific physicochemical features of the solid-liquid-gas phase interactions is described. The development of the porous structure in the 2-1000-nm range during the hardening of cement and its minerals is analyzed with the use o...
Article
To reveal the efficiency of additions intensifying the setting of alkaline binders, the early stages of the hydration of slag-alkaline cements were studied using thermokinetic analysis. Two types of the cements were taken: those based on alkali metal compounds creating an alkaline reaction in an aqueous medium (hydroxides) and practically not givin...
Article
A multiple approach to studying heterogeneous interactions in disperse systems, as exemplified by binders, is developed in terms of composition-process-structure-property relations. An exposition is given of the theoretical and experimental foundations for thermokinetic investigation of the rate and heat of hydration reactions, as well as for therm...
Article
Thermokinetic analysis of cements hydration under nonisothermal conditions was performed. The influence of the application moment, intensity and duration of heat effect on the velocity and completeness of the character of hydration was estimated.
Article
This paper presents results of thermokinetic studies on the early stages of hydration of some slag minerals, slag alkaline binders of traditional and new-generation compounds. A possibility of adjustment and control of hardening processes through thermokinetic indices of hydration (intensity and completeness of heat evolution) for various compounds...
Article
A new conceptual approach is proposed for evaluation of the most important properties of cement-containing composites on the basis of the rate and degree off completeness of hardening processes and study of the porous structure during material formation, within the limits of the system “composition-structure-process-property”.
Article
Possibility of quantitative estimation of porous structure parameters of capillary-porous materials (for example, cement stone) on the basis of thermodynamic analysis of pore liquid crystallization during the freezing was shown. Gibbs-Duhem equation for an equilibrium phase transition was found to describe the dependence of the crystallization temp...
Article
The influence of polymethylenepolynaphthalenesulfonates (PNSs) of various molecular weight on the early states of the hydration and structure-making of the principal mineral of cement clinker, viz., 3CaO·SiO2, has been studied. The relationship of the composition and structure of this type of surfactant to the adsorption activity and thermokinetic...
Article
A self-consistent mathematical model is proposed to describe the heat evolution during the hydration of inorganic binders. Such an approach reflects the sufficient role of the feedbacks in the systems under discussion. The principal physico-chemical reasons for the self-consistent description of the hydration kinetics are argued. To complete the ph...
Article
The use of surface active substances as superplasticizers of the cement mixture and concrete manufacture is discussed with some research results presented. The experimental results indicate, that by selective use of the surface active substances it is possible to improve the quality of hardened products. For best results the hardening temperature s...
Article
Reduction of the length of the induction period during the hydration of 3CaO multiplied by (times) SiO//2 is related to the introduction of ions forming insoluble hydroxides. The presence in the 3CaO multiplied by (times) SiO//2 structure of ions capable of large deformation of the crystal lattice, in particular, ions with a large ionic radius, int...
Article
The chemistry of binders has no general system of laws governing the reactions in dispersed systems undergoing a hardening process in spite of attempts to develop them. Successful attempts to analyze the kinetics of hydration usually employ calorimetry. Two types of trends are distinguishable in the early stages of hydration: fast and slow hydratio...
Article
Beim Auftragen der pro Zeiteinheit abgegebenen Reaktionswärme gegen die Zeit lassen sich zwei Typen abbindender Stoffe unterscheiden.

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Projects

Projects (2)
Project
Development of instruments and methods for calorimetric monitoring of the early stages of hardening of cement systems with chemical and mineral additives, including evaluation of the effectiveness of technological solutions. The methods of isothermal, semi-adiabatic (thermos) and adiabatic calorimetry are used to obtain data on the hardening of cement pastes, mortars and concretes with additives, heat of cements hedratation and temperature difference of mass concrete
Project
Thermoporometry of cement stone, formation pore structure, differential scanning calorimetry