Porous fillers for light concrete from technogenic raw materials

Tkach, Evgeniya; RAKHIMOV, Askhat

doi:10.1088/1757-899x/365/3/032014

Cited by 5 publications

(7 citation statements)

References 4 publications

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“…The theoretical and practical possibility of using ash waste from the burning of coalwater slurry, as well as other man-made waste, in the production of concrete has already been considered by some authors [15][16][17][18][19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Disposal of fly ash in the production of ash-concrete within the coal-watercoal cluster

et al. 2021

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Technologies for the disposal of industrial waste in the production of building materials are becoming particularly relevant in connection with the global trend of systematic reduction of the negative anthropogenic impact on the environment. Therefore, one of the goals of the pilot project of the innovative coal-watercoal cluster of housing and communal services is the utilization of ash waste from the combustion of coal-water fuel suspension in the production of building materials. The methodology of ash waste disposal consists in the modification of Portland cement with fine fly ash additives in the production of heavy concrete. As a result of the experiments, the authors proposed a recipe for a concrete mixture with ash waste additives. Tests of control samples of concrete and proposed samples of ash concrete with the addition of ash from the combustion of coal-water slurry were carried out. The brand of the proposed ash concrete in terms of compressive strength, corresponding to the design brand, is determined. Thus, we save the consumption of Portland cement as a binder, which is the most expensive component of concrete. At the same time, we dispose of man-made waste as a safe additive in the production of concrete with specified performance characteristics. The result obtained with the utilization of ash waste as an effective and safe aggregate for heavy concrete can be used in the implementation of a pilot project of an innovative coal-watercoal cluster of housing and communal services. Ash concrete with the addition of ash from the combustion of coal-water slurry can be recommended for use in industrial and civil construction.

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Section: Introductionmentioning

confidence: 99%

Disposal of fly ash in the production of ash-concrete within the coal-watercoal cluster

et al. 2021

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“…To ensure energy-efficient construction, durable materials are required that combine high heat-shielding properties with structural stability. Numerous developments in recent years have been devoted to the development of porous concrete technology, which is represented by cellular concrete and lightweight concrete based on porous aggregates [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Aerated concrete compares favorably with an extensive raw material base, a variety of products, and economical operation.…”

Section: Introductionmentioning

confidence: 99%

“…Development of efficient lightweight concrete technology depends on the quality of porous aggregates. Relevant is a research aimed at reducing density and increasing strength of aggregates, reducing energy intensity of production [1,7,[10][11][12][13][14][15][16][17][18][19]. Porous aggregates with a density of 300 -900 kg/m 3 for heatinsulating and structural concrete have been developed [6,8,9].…”

Section: Introductionmentioning

confidence: 99%

“…Porous aggregates with a density of 300 -900 kg/m 3 for heatinsulating and structural concrete have been developed [6,8,9]. To obtain aggregates, they recommend granular wastes of various industries [9][10][11][12][13][14][15][16][17][18][19][20], ashes from coal combustion [13,15,16], associated materials of extraction and processing of ores and fuels [10,14,[21][22][23]. The technology of granular foam glass is actively developing [17,18].…”

Section: Introductionmentioning

confidence: 99%

“…The technology of granular foam glass is actively developing [17,18]. Recent developments have focused on the study of structure formation and hardening of concrete with the participation of a porous aggregate [15,19,20].…”

Section: Introductionmentioning

confidence: 99%

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Porous aggregate development for lightweight concrete

Miryuk

2020

E3S Web Conf.

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The article presents the results of studies of a porous aggregate and lightweight concrete obtained using liquid glass and man-made materials (glass cullet, magnetite ore dressing waste, substandard rocks). Feasibility of a multicomponent feed mixture for pyroplastic swelling of granules is substantiated. Optimization of raw mix composition provided the possibility of combining various formation mechanisms of porous granules. A set of technological solutions has been developed aimed at improving the conditions of molding and hardening of raw granules. A method for preparing a raw material mass is proposed that minimizes structural defects of porous granules. Possibility of capacity reaction of a raw mixture due to mechanical activation of solid components and introduction of sodium additives is proved. Technological conditions for low-temperature expansion of a multicomponent mixture and production of porous granules with a density of not more than 300 kg/m3 are determined. The formula of molding mixture for obtaining lightweight concrete using a porous aggregate is proposed. The use of liquid glass as a binder in a concrete mixture is preferred. The temperature of concrete hardening is recommended. The technology of porous concrete developed implements multifunctional properties of liquid glass, provides the use of technogenic materials, saving of energy resources.

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Liquid-glass concrete of variable density

Miryuk

2020

IOP Conf. Ser.: Mater. Sci. Eng.

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Research results of porous compositions based on sodium liquid glass and fillers of various origins are presented. Materials, regulating rheological properties and thermal transformations of liquid glass compositions were used as the fillers. Feasibility of multicomponent fillers introduction into thermal expansion compositions was substantiated. Combined fillers matching a gel-forming component and thermosetting materials that emit a gas phase are preferred for improving molding properties of compositions and forming a highly porous polymodal material. A porous aggregate with a density of 250 – 300 kg/m3 was synthesized, providing high thermal resistance of the building envelope. Advantages of a liquid-glass matrix for producing lightweight concrete with a porous silicate aggregate are shown. Genetic commonality of an aggregate and a matrix contributes to the formation of durable concrete of a porous structure. Variants of the structure of variastropic liquid glass concrete, consisting of layers of various densities were proposed. Lightweight concrete of variatropic structure with a density of 800 kg/m3 and compressive strength of 10 MPa has been developed. The integrated use of liquid glass to obtain aggregate and concrete will ensure a compact technological scheme. The research is aimed at creating a technology of heat-insulating materials that combine high porosity with shape stability.

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Porous fillers for light concrete from technogenic raw materials

Cited by 5 publications

References 4 publications

Disposal of fly ash in the production of ash-concrete within the coal-watercoal cluster

Disposal of fly ash in the production of ash-concrete within the coal-watercoal cluster

Porous aggregate development for lightweight concrete

Liquid-glass concrete of variable density

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