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• DSc Prof
• Head of Department at Ukrainian State University of Railway Transport

Досліджено вплив карбонізації захисного шару бетону, що спричиняє втрату бетоном захисних властивостей до сталевої арматури, на довговічність опор. Виконано аналіз впливу конструктивних особливостей і технологічних факторів на характеристики захисного шару бетону опор контактної мережі, термодинамічний аналіз реакції нейтралізації продуктів гідрата...

Purpose. During operation on electrified direct current railways, reinforced concrete contact network pole of railways are damaged by electrical corrosion. Therefore, the development of alternative support structures, in particular, concrete with composite reinforcement, and the assessment of their bearing capacity is an urgent task. The purpose of...

The object of this study is fine-grained concrete from the waste of mining and processing plants. These wastes are fine-grained dusty sands of polymineral composition. Their use as an aggregate for concrete is restrained by high water consumption, which does not make it possible to obtain sufficient strength for concrete. Therefore, the problem to...

The paths of electric currents flowing through sleepers and traditional methods of corrosion under the influence of leakage currents are analysed. Based on the results of this analysis, a new method of studying the processes occurring in concrete under the influence of electrical potentials is proposed for comparative studies of the electro-corrosi...

The theoretical substantiation of the production of especially fine-grained concrete (EFC) from the waste of the Poltava Mining Concentration Plant as a fine-grained aggregate has been performed. Its structure is substantiated taking into account the contacts between the angular aggregate grains, the possibility of increasing strength by introducin...

A comprehensive study of the technical condition, corrosion processes, damage and load-bearing capacity of the reinforced concrete chimney pipe, which removes the gas-smoke mixture formed in the technological processes of coke-chemical production and is an aggressive environment, was performed. A methodology for predicting the remaining resource of...

Виконано комплексне дослідження корозійних процесів, пошкоджень інесучої здатності металевої димової труби, що відводить газодимову суміш, утворювану в технологічних процесах кольорової металургії, і розроблено методику прогнозування її остаточного ресурсу. Виконано аналіз складу і температурно-вологісного режиму зазначеноїсуміші, встановлено ступі...

Проведено експериментальні дослідження впливу електричних потенціалів на інтенсивність корозійних процесів у залізобетонних конструкціях підрейкових основ.Розроблено методику досліджень, яка передбачає створення цих впливів на моделі, та оцінювання їхніх наслідків. Створено впливи капілярного підняття, випаровування, дифузії, кристалізації солей, е...

Розроблено цементний композит із підвищеними гідрофізичними та радіаційно-захисними властивостями, для забезпечення яких було, по-перше, модифіковано цементе в’яжуче хімічними добавками, що сприяли синтезу кристалогідратів із великим вмістом води; по-друге, до складу додано полідисперсні системи у вигляді залізистих кварцитів, у яких мікронні части...

Робота присвячена дослідженням впливу усадкової контактної напруги на міцність зчеплення гідроізоляційного складу дрібнозернистого цементного бетону і «старого» бетону. У результаті проведених у роботі досліджень встановлено, що ущільнення гідроізоляційного складу, яке сприяє зменшенню внутрішніх напруг при твердінні і, отже, збільшує величину зчеп...

Для сполучення залізобетонних плит безбаластного мостового полотна з металевими балками залізничних мостів традиційно застосовується зручний для укладання і сприятливий за фізико-механічними характеристиками гумодерев’яний прокладний шар, що має недостатню довговічність через гниття деревини. Виконано аналіз напружено-деформованого стану залізобето...

Conductive silicate compositions and compositions based on Portland cement for screen protection against electrical corrosion of reinforced concrete structures and buildings on electrified direct current railways are theoretically and experimentally substantiated. The compositions are used as putty or plaster on structures to be protected. The resu...

Composites based on mineral binders are highly concentrated polydisperse systems. These systems consist of a dispersed phase in the form of particles of filler and binder, hydration products, as well as a dispersion medium in the form of a porous electrolyte (mixing water). The properties of such systems are determined by the action of forces that...

To eliminate significant wear of building structures, increase the bearing capacity when operating conditions change, it may be necessary to restore / increase the bearing capacity of structures. One of the most common methods of strengthening is to increase the section of the structure by installing duplicate elements. For reinforced concrete stru...

Research is devoted to the development of ideas about the mechanism of the flow of corrosion currents through the structures of railway tracks and buildings and the justification of methods of their protection against electrical corrosion. As a result of theoretical studies and field tests, the electric circuits of the leakage currents from the pul...

This article presents the results of a study on the development of an anti-corrosion plaster composite based on water glass with increased electrical conductivity. Known acid-resistant quartz-fluorosilicate composites containing liquid sodium silicate, sodium fluorosilicate and acid-resistant high-silica filler in the form of quartz, andesite or di...

An analysis of the structure of the reinforced concrete ballastless bridge decks BBD of metal railway bridges has been carried out. The traditional element of the interconnection of BBD slabs with steel bridge trusses is a rubber-wooden fabric layer, which has the advantage of being simple and technologically advanced. However, it has low durabilit...

The field studies of reinforced-concrete sleepers were carried out on direct current (DC) electrified railway sections that house the sleepers exposed to the most intensive corrosion damage. The statistical analysis of data made it possible to establish the propagation of the different types of damages. It was demonstrated that the defects that dem...

This work is devoted to the problems of preserving the existing metal stock of Ukraine, ensuring the corrosion and functional stability of metal-intensive objects of critical infrastructure and potentially dangerous objects in the event of their destruction. The results of fundamental studies of the mechanisms of various types of corrosion, the eff...

The influence of superplasticizers-polycarboxylates and their complex additives withaccelerants - electrolytes and dispersion of calcium hydroxylates on the early strength of concretefor concrete of concrete sleepers has been studied. It was found that the use of superplasticizerspolycarboxylates can improve the early strength of the concrete after...

Purpose. On the railways of Ukraine in some areas there is an intensive premature exit sleepers due to the formation of defects that can affect the safety of trains and cause significant material losses due to a single replacement of a significant number of sleepers. The purpose of the study is to establish the causes of damage reinforced concrete...

The article analyses the causes of cracks and other damage in reinforced concretesleepers. The effect of concrete corrosion, which is caused by the interaction of cement alkalis withreactive aggregates, on damage to sleepers has been established. The significance of each of thereasons has been established. Corrosion of concrete sleepers, which is c...

The natural and technological factors influencing on the depth of injection cement mortars penetration into the cracked rocks and emptiness under the lining of mountain tunnels have been studied. There are the width of cracks in rocks and groundwater pressure in them, the dynamic viscosity of the solution, which is determined by the content of addi...

The purpose of the article is to further develop our new theory of Submicro- and Macrocolloidal chemistry and the PCM of the Earth (Physicochemical mechanics of the Earth). It is shown that all Global processes in the Universe and on the Earth are generated by excess negative and posi-tive charges (ENC and EPC) at all levels of the Universe. It was...

According to official documents, HIV / AIDS began in 1981 in the United States, quickly turning into a pandemic. Until now, it has not been stopped, as we believe, due to the lack of disclosure of its real cause and mechanism of its origin. It has been established that the main reason for the onset and massive growth of diseases is the beginning of...

The article is devoted to the study of the causes and mechanisms of the Covid-19 Coronavirus in the world. It arose in late 2019 in China, turned into a pandemic in early 2020, and has not stopped by the end of this year. It has been established that the main factor in the emergence and elimination of a pandemic is the accumulation of a very high s...

This paper reports a study into the effect of mineral fillers such as ground granulated blast furnace slag, microsilica, and nano dispersed alumina on the structure formation and water resistance of gypsum. The theoretical models of gypsum stone structure with mineral fillers have been built and described, taking into consideration the sign of the...

З метою встановлення впливу різних чинників на пошкодження залізобетонних шпал з проміжними рейковими скріпленнями безпідкладкового типу та підвищення їхньої тріщиностійкості виконано експериментальні дослідження, які включали натурні обстеження та випробування статичними і динамічними навантаженнями. У результаті випробувань шпал статичним наванта...

Blast furnace slags are subdivided into granular and dump. Granulated slag is widely used in the construction industry to production of Portland cement, Portland slag cement, slagalkaline cements, and concretes based on these cements. Dump slag is of less use, because it has low activity. The phase composition of granular and waste slag was investi...

The coatings formed by water-proofing compositions of a penetrating action are characterized by high physical and mechanical properties and good adhesion to the substrates used for their deposition. The experimental investigations of the influence multicomponent chemical additive that provide waterproofness on the formation of the hydration product...

The influence of mineral additive, i.e. ground granulated blast-furnace slag on artificial gypsum stone humidity strains has been studied. The slag content was varied in the range from 0 to 0.33 by weight based on the total amount of the mixture. The measurements were carried out on prism samples with dimensions of 160x40x40 mm. The samples were pl...

The article presents the main results of complex experimental and theoretical research into the crack resistance and the limit state of reinforced-concrete sleepers with elastic rail fastening systems without base-plate. The objective of this study is to uncover reasons for the cracks and other breakages during operation, demonstrate their importan...

The article presents the studies of the processes of structure formation in the system "cement-plasticizer - crude carbon nanotubes", established the relationship with the parameters of the structure, physical-mechanical and operational properties of composite materials from the standpoint of physicochemical mechanics of dispersed systems and shows...

The article presents the studies of the processes of structure formation in the system “cement-plasticizer - crude carbon nanotubes”, established the relationship with the parameters of the structure, physical-mechanical and operational properties of composite materials from the standpoint of physico-chemical mechanics of dispersed systems and show...

The paper is concerned with dealing with an urgent problem of present-day construction materials science and engineering such as increasing the strength of cement stone when using finely dispersed fillers. It has been found that the physical and mechanical properties of Portland cement-based materials largely depend on the strength of the cement ma...

In the article the diagnostic and regulation problems are considered for the rheological characteristics of mortars which are used for pumping into the interpipe gaps or cracks during repairing the pipelines, tunnels, and other objects. It is important to obtain the necessary mortar viscosity which allows providing a complete hole filling. For this...

Theoretical and experimental investigations of the influence of the molecular structure of polyurethane on its vibro- and electroinsulation properties have been carried out. It was established that the rheological model of polyurethane and rubber corresponds to the Kelvin resilient-&-elastic solid. However, due to the lateral electrostatic repulsio...

Global Warming is officially recognized as one of the aspects to the Earth’s climate change; and its major factor is a sharp anthropogenic increase in concentration of greenhouse gases, especially carbon dioxide (CO2). However many scientists do not agree with this view and do not consider the anthropogenic factor as its basic reason, thus regardin...

The issue of wastes reclaiming in large cities is really a pressing problem today. First of all, the wastes which occupy wide areas of land need to be reclaimed. The metal production slag and waste water sediments are typical examples of such waste products. They create a wide area of ecological and social discomfort when collected and accumulated...

Many types of the corrosion of Portland cement stone immersed into inorganic liquid media are conditioned by chemical exchange reactions between the substances dissolved in them and cement hydration products. To prevent the corrosion formation in corrosive media it is necessary to form cement clinker hydration products that do not enter into ion ex...

The article deals with theoretical and experimental research into dependency of crack resistance of concrete under dynamic effects on coefficients of grain separation of coarse and fine aggregates. It was established that these dependencies were of extreme nature. The research yielded the optimal values of coefficients of grain separation of coarse...

Theoretical and experimental investigations of the influence of concrete moisture, its age, holding conditions after its thermal moisture treatment and other factors on the specific electric resistance of the concrete of a C32/40 grade used for reinforced concrete sleepers have been carried out. The obtained research data allowed us to specify hold...

Theoretical and experimental investigations of the studies of the mechanism of a penetrative action of waterproofing compositions have been carried out. It was theoretically justified that the mechanism of penetration of the salts of the complex chemical additive of analyzed mixture into the concrete (mortar) of the structure carried out according...

Розроблено оригінальний метод дослідження деформативних властивостей ґрунтополімерного композита, утвореного внаслідок ін'єктування у глинистий ґрунт поліуретанового матеріалу SPT®. Згідно з цим методом ґрунт поміщують у силову циліндричну ємкість, ущільнюють, закривають силовою кришкою та через ін’єкційну трубку нагнітають у нього матеріал SPT®. П...

A thermodynamic analysis of the reactions of calcium chloride and calcium nitrate with tricalcium aluminate when used as a hardening accelerator for portland cement, as well as decomposition reactions of calcium hydrochloraluminate (CHChA) and calcium hydronitroalyuminate (CHNA) formed during the hardening was performed. The conditions of stable ex...

The monograph presents the results of research on the development and improvement of waterproofing cement composites of penetrating action, the development of ideas about the mechanisms of their hydration, hardening, diffusion penetration, colmatage action, etc. The effectiveness of research is due to their fundamental foundation - the application...

Progress in modern engineering devices favours the development of independent computer systems of intelligent change management of operational characteristics of construction facilities. The article deals with the continuous control system (monitoring) of the soil moisture. The capillary sensor applied provides a far higher accuracy in determining...

The results of the study of the effect of the structure and properties of the components to the electrophysical properties of portland cement compositions are given in this article. The compositions are designed to protect against electrocorrosion. Dependences for the determination of the specific electrical resistance and the specific electric con...

The theoretical basis of reduction of thermal deformations of the ballastless continuous welded track has been developed. The design of the track with integrated rails has been improved by using a special concrete liner of optimal composition with quartz fillers and aggregates and two-component polyurethane. The method of calculating the concrete c...

The influence of the alkaline component on the physico-mechanical properties and the structure of the clinkerless waterproof composition on the basis of Kryvyi Rih blast furnace slag and an alkaline component – sodium hydroxide – have been investigated. High and very high correlation between the compressive strength f of the composition and the alk...

The paper presents a computer modelling technique for modernization of bridgework operations by building-up a mounted reinforced concrete slab. It implements the technique of the evolutionary transformation of a model in one calculation cycle with redistribution of forces between the elements of the built-up section, and consideration of the impact...

The monograph is devoted to a theoretical study of the possibility of the alleged death of the United States by breaking in this place of the continent, huge super earthquakes in faults, eruptions in the supercalder. The theoretical basis is a new scientific discipline - "Submicro- and Macrocolloid Chemistry and Physical and Chemical Mechanics of t...

Досліджували застосування заземлених екранів-покрить із композицій з графітовим наповнювачем на основі портландцементу і на основі силікату натрію як засобу захисту споруд від електрокорозії струмами витоку. Була розроблена оригінальна методика, що полягає у порівнянні сили струму крізь арматуру і бетон моделей споруди без захисту та із захистом за...

Стаття присвячена дослідженню впливу мінеральних добавок на водостійкість будівельного гіпсу. Наведено результати експериментальних досліджень впливу добавок шлаку та нанодисперсного глинозему на міцність та водостійкість гіпсового каменю. Виконано електронно-мікроскопічні дослідження особливостей структури отриманого матеріалу. Установлено, що спі...

The ecological problem of utilization of metallurgical slags is shown.As a result of the analytical review of literature sources, there are varieties and tonnage of slags in Ukraine, their chemical composition, data on the hydraulic activity of slags of various types. The most active are granulated slags, which contain the largest amount of glass p...

The article is devoted to the substantiation of the non-cement composition of penetrating action on the basis of blast furnace granulated slag and sodium silicate. The results of the investigation of the influence of the content of sodium hydroxide and the complex chemical additive that provides penetrating action on the physical and mechanical pro...

Physicochemical studies of interaction of the hydration products of Portland cement with the complex chemical additives, which ensure the penetrating action of moisture-proof cement compositions with the borosilicate fiberglass, have been executed. It is established that the fiberglass tightly outgrows by such products of hydration as crystal hydra...

Cement-based penetrating waterproof compounds compact the concrete structure due to penetration into the microcracks, pores and capillaries of slightly soluble crystalline hydrates. The coatings made from them do have some drawbacks such as low tensile strength and shrinkage, which may lead to cracks and reduce impermeability. Dispersed fiber reinf...

The present-day situation is such that industrial production, municipal economy, traffic, etc consume a continuously increasing amount of energy. As a result, the range of propagation of electric stray currents, including their appropriate potentials and leakage currents that affect building structures and facilities is expanded and this is of impo...

The ways of composites’ directed structuring are covered in this work. The qualitative and quantitative assessment of the role of liquid phase is made. The regime of the effective vibro vacuumizing processof cement composite mixture, which makes it possible to extract free water is developed. Thin-walled articles obtained in this case possess high...

The monograph is devoted to the development of a fundamentally new theory of the origin of the Earth and the disclosure of the real mechanisms of global phenomena, processes, and catastrophes occurring on it. A critical analysis of the Earth Science is given. A new scientific discipline has been developed - Submicro- and Macrocolloid Chemistry and...

The monograph is devoted to the development of a fundamentally new theory of the origin of the Earth and the disclosure of the real mechanisms of global phenomena, processes, and catastrophes occurring on it. A critical analysis of the Earth Science is given. A new scientific discipline has been developed - Submicro- and Macrocolloid Chemistry and...

The monograph is devoted to the development of a fundamentally new theory of the origin of the Earth and the disclosure of the real mechanisms of global phenomena, processes, and catastrophes occurring on it. A critical analysis of the Earth Science is given. A new scientific discipline has been developed - Submicro- and Macrocolloid Chemistry and...

The monograph is devoted to the development of a new theory of the structure of the space vacuum and criticism of modern theories of the origin of the Universe. It is a synthesis in popular science form of relevant sections from the recently released three-volume monograph by LAP Lambert Academic Publishing “Threat and prevention of mass loss of li...

This article discusses of structures and facilities of railway station complexes and the reasons for their injuries leakage currents on the electrified sections. The intensity of damage electric corrosion exposed notonly to design with loose concrete of low strength but good dense concrete. These measures for the protection of structures and facili...

Because of experimental studies, we found the kinetics of the cement brick and concrete strength gaining with additions of superplasticizer and the hardening accelerators at different temperatures. We found that hardening accelerator additions, including chlorides, when loaded in a limited quantity in especially dense concretes, completely fix to c...

The work is devoted to the creation of theoretical, experimental and methodological foundations of modern building materials and structural systems for the construction of affordable housing and infrastructure. The monograph develops the physical-chemical and thermodynamic bases for the synthesis of minerals and their hydration to produce artificia...

Досліджено вплив добавок суперпластифікаторів та прискорювачів твердіння на кінетику тверднення бездобавочного портландцементу і важкого бетону з нього за різних температур. Встановлено закономірності такого впливу, продукти гідратації, що забезпечують швидкий набір міцності. Встановлено, що добавки прискорювачі, у т.ч. хлориди, уведені в особливо...

Розроблено нові принципи і технологічні аспекти використання дисперсних речовин, у тому числі техногенного походження, при отриманні будівельних композиційних матеріалів з покращеними експлуатаційними властивостями, зокрема: розроблено фізико-хімічні основи композиційної побудови малоклінкерних золо- та шлакоцементних в’яжучих систем, які не поступ...

Розроблені основні положення колоїдної хімії та фізико-хімічної механіки мінеральних в’яжучих речовин і композиційних матеріалів на їх основі, зокрема, класифіковано їх як дисперсні системи і матеріали, встановлено поверхневі заряди і електроповерхневі потенціали їх часток, умови виникнення електрогетерогенних контактів між ними, розроблено основи...

Встановлено основні характеристики матеріалів, які застосовують для виготовлення залізобетонних шпал. Рекомендовано: застосовувати портландцемент ПЦ І-500Н з активністю, не меншою 3639 МПа після пропарювання і 3843 МПа у віці 2 діб; щебінь суміші фракцій 520 мм, виключивши застосування щебеню суміші фракцій 525 мм; продовжити дослідження із розділь...

Проведено аналіз напружено-деформованого стану плит безбаластного мостового і прокладного шару під ними з урахуванням різного модуля пружності прокладного шару, а також різного зусилля натяжіння високоміцних шпильок

Выполнен анализ влияния волокнистых наполнителей – стеклянного, хризотилового, полиэфирного, полипропиленового на физико-механические свойства цементных композитов. Установлены закономерности влияния вида и модуля упругости волокон на модуль деформации, прочность и трещиностойкость композитов.

Наведено результати аналізу конструкції найбільш розповсюджених рейкових скріплень на залізобетонних шпалах, їх недоліків, розробки оригінальної конструкції пружного рейкового скріплення і технології виготовлення залізобетонних шпал для них, а також 12-річного досвіду дослідної експлуатації шпал і скріплень

Проведено аналіз придатності сучасних сухих будівельних сумішей промислового виробництва для улаштування прокладного шару безбаластного мостового полотна металевих залізничних мостів. Розроблено склади цементних і полімерцементних розчинів і дрібнозернистих бетонів для прокладного шару.

На основе развиваемого авторами нового научного направления «Субмикро- и макроколлоидная химия и Физико-химическая механика Земли» выявлены новые ранее неизвестные ученым разрушительные силы электрической природы, лежащие в основе глобальных разрушений и изменения свойств материалов. Раскрыты механизмы возникновения этих сил, а также механизмы их в...

Разработан рулонный композиционный материал для ремонта и гидроизоляции бетонных, железобетонных и каменных конструкций и сооружений. Материал состоит из нетканого материала объемной структуры, насыщенного сухой смесью портландцемента и комплекса химических добавок. При использовании насыщается водой и прижимается к защищаемой поверхности. Отвердев...

Предложено использование отсева доломита и отходов обогащения угля для получения доломитового цемента. Выполнены физико-химические исследования и физико-механические испытания образцов цемента. Показано, что в отличие от существующих доломитовых вяжущих, предложенный цемент обладает способностью набирать прочность при затворении водой

Установлено, что одной из основных причин повреждений и преждевременного снижения долговечности бетонных и железобетонных конструкций сооружений, эксплуатируемых на железных дорогах Украины, элекрифицированных постоянным током, является несовершенство теории электрокоррозии бетона и железобетона и конструкций из них. В рамках развития новых теорети...

New notions of the mechanism of strength and water resistance of gypsum were de-veloped. These notions are based on the improved understanding of the structure of gypsum. It is shown that low strength and water resistance of gypsum caused by the presence of hydrogen bonds in the contacts between the blocks of crystalline hy-drates Keywords: . The s...

The calcium sulfate dihydrate is a hydration product of hemihydrate gypsum. It is a highly disperse system with aqueous dispersion media. Due to that fact, strength and water resistance are determined primarily in depends on nature and water resistance ability of the contacts between the structural elements and then in depends on structural element...

В данной статье приводятся результаты исследований трещинообразования в обводненном бетоне при воздействии пульсирующего однонаправленного электрического потенциала путем прямых наблюдений за развитием трещин с помощью оптико-микроскопического анализа, а также путем анализа возникновения электрических потенциалов и их распределения по высоте образц...

Викладені основоположні первинні положення колоїдної хімії та фізико-хімічної механіки цементів, бетонів і конструкцій із них. Наведені рівняння електроповерхневого потенціалу дисперсної фази, міцності електрогетерогенного контакту і цементного каменю.

The monograph presents a critical analysis of the traditional provisions and theories of the resistance of materials, fracture mechanics, concrete science about the structure, strength, deformation, destruction of solids. A new quantitative theory of strength, destruction, durability of portlandcement stone and concrete, based on the authors' devel...

Notions of strength of materials as different theories were developed in different sciences – about strength of materials, mechanics of solid, mechanics of destruction, theory of strength of metals and concrete and others. Among the theories of strength of materials, developed in these sciences, it can be emphasized the classic ones (phenomenologic...

A modern tendency of expansion of raw material, using additions and waste in cements, and also creations of new types of cement and concretes requires to develop the existing and create the new theoretical notions and theories of clinker formation. Developed by the authors of the article with reference to cements Colloidal chemistry and its section...

The suggested additional additive term in the Einstein equation for viscosity allows to take into account influence of electro-surface potential of the solid phase on the orienta-tion and structuring of the molecules of dispersion medium. Such interaction causes non-linear relationship between viscosity and particles concentration. Besides, this al...

The monograph outlines the fundamentals of the theory of electroheterogeneous hardening of portlandcement, which is a further development and deepening of the theory of hydration structure formation of P.A. Rehbinder. Instead of phase contacts that affect the strength of hardening cement stone, based on the theory of electroheterogeneous hardening,...

The monograph examines the provisions, theories and laws of colloid chemistry, physical-chemical mechanics of disperse systems and materials as applied to cement concretes and the structures of them. It is known that the properties of cement stone, concrete and structures made of it are determined by the highly dispersed component of cement stone -...

The article was published in the Bulletin of the National Technical University "Kharkiv Polytechnic Institute", 50 (2011) 97-103 in Russian. The effect of a complex organic-mineral additive, including fine calcite and fiberglass, on the properties of cement stone of waterproofing dry mixes was investigated

In order to provide water resistance for increasing strength of the gypsum binding materials, it is necessary to introduce admixtures into their composition. This will ensure a disperse phase with a negative equilibrium electro-surface potential. This is confirmed by a high strength and water resistance of gypsum-cement-puzzolane, gypsum-cement-sla...

The theoretical and experimental researches of dependence of gypsum water resistance from mineral additives have been done. Dependence of water resistance from electric surface properties of additives, their quantity and coefficient of grains expansion of additive by the gypsum test was determined. The calculated and experimental method of water re...

Heavy concretes of high class on strength, which are used for bridges and other constructions, are often characterized by the promoted deformation of long-term creep. A long-term creep develops during the tens of years and results in impermissible deformations of constructions, which are exceeding norms. Such deformations were detected in Europe in...