Improving the Efficiency of Large-Pore Concrete Through the Use of Composite Binders From Technogenic Raw Materials of Different Nature

Lesovik, R. V.; Sopin, Mihail; Lesovik, G. A.; Bogusevich, Galina; Ageeva, Marina; Shapovalov, S. M.

doi:10.12737/22545

Cited by 4 publications

(3 citation statements)

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“…Modern research in Russia and abroad shows that the most promising solution to problems related to environmental issues and rational use of natural resources in the production of highquality concretes is the transition from traditional mono binders to composite (multi-component) binders (CB) systems consisting of a basic binder and mineral components, which can be used as mechanically activated raw materials of technogenic origin [1][2][3][4][5]. In addition, there is no doubt that increasing the efficiency of binders as the basis of a construction composite in terms of reducing its content in the production technology of the product will significantly increase the technical and economic component of the production of concrete composites.…”

Section: Introductionmentioning

confidence: 99%

Effectiveness Evaluation Criteria of Using Fine Powders of Secondary Concrete as a Component of Composite Binder

Drozdyuk

Ayzenshtadt

Aksenov

2021

MSF

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The paper considers the possibility of using energy criteria (surface activity, free surface energy) to quantify the efficiency of a highly dispersed system consisting of fine particles of secondary concrete as a component of composite binder of the hydration type of hardening. Using the G.A. Zisman method, the value of the critical surface tension was determined for secondary concrete fractions with different degrees of dispersion, which gives an idea of the free surface energy of a surface area unit. Based on the experimental data for determining the specific surface area and critical surface tension, the free surface energy and surface activity of the studied concrete powder were calculated, which can serve as criteria for quantitative energy characteristics of raw materials for the production of composite binders. Calorimetric studies related to measurements of the thermal effects of the hydration reaction of highly dispersed samples of secondary concrete have shown that this process is exothermic, the enthalpy of hydration of which is comparable to a similar parameter for cement. It was experimentally shown that fine powders of secondary concrete are effective as components of a composite binder, but they need to be pre-activated to optimal parameters, one of which is surface activity. In addition, the symbasis of changes in surface activity, the specific heat of the hydration reaction of highly dispersed concrete fractions and the compressive strength of fine-grained concrete samples made by using a composite binder containing a highly dispersed fraction of secondary concrete was established.

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Section: Introductionmentioning

confidence: 99%

Effectiveness Evaluation Criteria of Using Fine Powders of Secondary Concrete as a Component of Composite Binder

Drozdyuk

Ayzenshtadt

Aksenov

2021

MSF

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“…From a technological point of view, the transition to porous structural materials is more realistic, allowing for the design, reinforcement and structures manufacture by traditional methods, albeit with certain changes, allowing to take into account the work nature particularities of such composites. This determines the relevance of non-autoclave varieties of cellular concretes, as well as structural materials [6,7].…”

Section: Introductionmentioning

confidence: 99%

Structure Formation Features of Non-Autoclaved Gas Concrete Matrix on the Basis of Composite Binders with Various Mineral Additives

Absimetov

Elistratkin

Ageeva

2019

MSF

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One of the effective ways to reduce the material consumption of structures, to save all types of resources due to this, is the transition to porous constructional materials instead of traditional dense materials. In this regard, non-autoclaved gas concrete is of great interest. This material has a high manufacturability and has a good potential for improving the strength properties due to the replacement of traditional portland cement by special composite binders. Available publications confirm the effectiveness and prospects of this direction. An important disadvantage of such works is the fact that the binder indicators and the final cellular concrete characteristics are considered mainly independently. In our opinion, it is more correct to consider at least two structure-forming processes proceeding in parallel and sequentially at different scale levels. Micro level is a stone structure formation based on the composite binder; macro-level is a gas porization of cellular mass concrete. These processes have a great mutual influence on each other, and therefore this article attempts to observe the gassing products effect on the stone hardening based on composite binders, as well as the composite binder makeup on the viscosity change of the molding compound, as an important condition for the formation of high-quality less defective pore structure of cellular concrete.

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“…Smart concrete is among of the innovative construction materials. It can work in extreme climate and service conditions [10] considering social and aesthetic aspects [11].…”

Section: Introductionmentioning

confidence: 99%

The improvement of thermal characteristics of autoclave aerated concrete for energy efficient high-rise buildings application

2018

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Abstract. Nowadays, the problem of energy saving is very relevant. One of the ways to reduction energy consumption in construction materials production and construction of civil and industrial high-rise buildings is the application of claddings with heat-insulating performance. The concept of energy efficiency of high-rise buildings is closely related to environmental aspect and sustainability of applied construction materials; reducing service costs; energy saving and microclimate comfortability. A complexity of architectural and structural design as well as aesthetic characteristics of construction materials are also should be considered. The high interest focused on materials with combined properties. This work is oriented on the study of energy efficiency of buildings by improving heat-insulation and strength performance of autoclave aerated concrete. The applied method of sulfate activation of lime allows monitoring phase and structure formation in aerated concrete. The optimal mix design of aerated concrete with the compressive strength up to 8.5 МPа and decreased density up to 760 kg/m 3 was proposed. Analysis of structure at macro-and microscale was performed as well as the criteria of an optimal porosity formation was considered a number, size, shape of pore and density of interior partition. SEM analysis and BET method were performed in this research work. The research results demonstrated the correlation between structure and vapor permeability resistance, also it was found that the increase of strength can lead to reduction of thermal conductivity.

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Improving the Efficiency of Large-Pore Concrete Through the Use of Composite Binders From Technogenic Raw Materials of Different Nature

Cited by 4 publications

References 0 publications

Effectiveness Evaluation Criteria of Using Fine Powders of Secondary Concrete as a Component of Composite Binder

Effectiveness Evaluation Criteria of Using Fine Powders of Secondary Concrete as a Component of Composite Binder

Structure Formation Features of Non-Autoclaved Gas Concrete Matrix on the Basis of Composite Binders with Various Mineral Additives

The improvement of thermal characteristics of autoclave aerated concrete for energy efficient high-rise buildings application

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