Study of the Properties of Water-Hardened Cement Stone Depending on the Water-Cement Ratio and Age

Maksimova, I. N.; Makridin, N I; Erofeev, Vladimir; Barabanov, D N

doi:10.1007/978-3-030-72404-7_20

Cited by 2 publications

(4 citation statements)

References 7 publications

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“…In this case, the key factor is the chemical composition of the formed substances, which affects the strength of an individual bond in the structure. [6,7]. The task of establishing the relationship between the number of crystallization centers, the chemical composition of the composite, the rate of formation of bonds between individual elements and the strength of the composite is of interest for mineral systems.…”

Section: Introductionmentioning

confidence: 99%

Study of the kinetics structure formation of cement dispersed systems. Part II

Korolev¹,

Grishina²,

Inozemtcev³

et al. 2022

Nanobuild

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Introduction. The study of the kinetics structure formation is rarely the subject of a careful study. Although it is important for materials used to create elements of building structures, energy elements, thermoelements and materials for other purposes. The article proposes refinements of the methodology for determining the parameters of the kinetics structure formation of cement composites, including modified compositions. Methods and materials. The structure formation of cement systems with plasticizers, microsized mineral additives (hydrosilicates of barium, copper, iron and zinc) and nanosized particles of zinc hydrosilicates has been studied. Results and discussion. It is proposed to single out two stages of initial structure formation: the stage of setting the cement paste and the stage of hardening. It was found that the strength of the material at the stage of hardening should be influenced by an additional factor, depending on the type of the introduced substance. A strong negative relationship between the parameters α and n of the equation) at the hardening stage was confirmed. The trends identified at the setting stage also demonstrated, namely: an increase in the rate of structure formation leading to the formation of a less dense structure. Conclusions. An analysis of the change in the value of the internal dimension of the system during the transition from the stage of setting to the stage of hardening made it possible to identify two trajectories of the system development. The first trajectory appears only by combining the elements of the structure (trajectory No. 1). Preservation of the characteristic dimensions of structural elements, but an increase in the proportion of elements with small dimensions (when the conditions that prevent the combination of elements of the structure are realized) describes the second trajectory (trajectory No. 2). The implementation of trajectory No. 2 is typical for compositions which the structure formation of cement stone is carried out in the presence of Melment F15G plasticizer or microsized particles of copper or zinc. For other studied compositions, structure formation is proceeding with the enlargement of structural elements.

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Section: Introductionmentioning

confidence: 99%

Study of the kinetics structure formation of cement dispersed systems. Part II

Korolev¹,

Grishina²,

Inozemtcev³

et al. 2022

Nanobuild

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“…Бетон считается главным строительным материалом, который используется во всем мире и ресурсы его применения до конца не израсходованы. Он применяется уже многие столетия, развивается и улучшается [1][2][3][4].Технология бетона на сегодняшний день проделала длительный путь в области получения материалов с уникальными свойствами, которые расширили сферу применения бетонов, их номенклатуру. В XXI веке строительная отрасль представляет огромный диапазон по усовершенствованию физико-механических характеристик изделий и конструкций.…”

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“…особо плотной структуры, которые характеризуются высокими физико-механическими свойствами и в первую очередь прочностными показателями. Прочностные характеристики бетона и других цементных композитов обуславливают долговечность и надёжность бетонных, ж/б изделий и конструкций [3,6]. Прочность цементного композита имеет прямую зависимость от его состава, например, при снижении количественного содержания вяжущего происходит падение прочности материала.…”

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Study of the Influence of Modified Additives on the Properties of Concrete

Ledyaykina,

Ledyaykin

2024

Bulletin of Belgorod State Technological University Named After. V. G. Shukhov

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The problem of improving the efficiency of the quality of concrete and reinforced concrete is a promising direction that cannot be fully realized without the use of chemical additives. Additives are considered a simple way to improve the performance of a cement composite; they allows to reduce the amount of binder and regulate the technological characteristics of the concrete mixture and the physical and mechanical properties of the material, as well as increase the durability of buildings and structures. Currently, a large number of additives are used, introduced into concrete mixtures, which are classified according to their mechanism of action, chemical composition and other characteristics. The purpose of this research was to optimize the compositions of concrete with additives in terms of strength and deformability. The object of the study is fine-grained concrete produced on a cement binder using various modifying additives, for which modifiers such as «Advance Ultra», «Superplast Prima», «Superplast Standard» have been studied. The studied parameters were the compressive strength and elastic modulus of fine-grained concrete. It was revealed that the introduction of modifying additives helped to increase the studied indicators. At the same time, the greatest increase in strength and elastic modulus is achieved when using the Advance Ultra plasticizer

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Study of the Properties of Water-Hardened Cement Stone Depending on the Water-Cement Ratio and Age

Cited by 2 publications

References 7 publications

Study of the kinetics structure formation of cement dispersed systems. Part II

Study of the kinetics structure formation of cement dispersed systems. Part II

Study of the Influence of Modified Additives on the Properties of Concrete

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