Porous Magnesia Compositions with Various Fillers

Miryuk, Olga

doi:10.1007/978-3-030-68984-1_50

Cited by 5 publications

(6 citation statements)

References 9 publications

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“…Magnesia binders are distinguished by intense hardening, high strength properties, and expressive adhesion to various materials [ [21], [22], [23]].…”

Section: Discussion Of the Resultsmentioning

confidence: 99%

Granular materials based on expanded sands and their production waste

Miryuk¹,

Zagorodnuk²

2022

KIMS/CUMR/MShKP

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The article presents the results of studies of granular materials obtained by non-firing technology. For the formation of granules, composite cement and magnesia binders containing waste products of expanded perlite and expanded clay are proposed. Mechanical activation of composite binders intensifies the processes of hydration and structure formation, contributes to increasing the strength of materials. The combination of a binder with a filler in the form of waste from the production of porous aggregates ensures a decrease in the density of the binder, the formation of a finely dispersed porous structure of the composite material, the formation of stable hydrates. The porous structure of the granules is provided by the use of porous sand to form the core of the granules. Studies of the structure of granules by electron microscopy revealed that the reliable adhesion of particles of porous sand with a composite binder stone provides high strength of porous granular materials. Cement granules based on expanded perlite sand are characterized by a density of 300 – 400 kg/m3 and a compressive strength of 1.8 – 2.6 MPa. Magnesia granules based on expanded clay sand have a density of 450 – 500 kg/m3 and compressive strength of 3.5 – 5.7 MPa. The work is aimed at creating effective building materials using resource-saving technology, at the rational use of production waste.

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“…Magnesia binders are distinguished by intense hardening, high strength properties, and expressive adhesion to various materials [ [21], [22], [23]].…”

Section: Discussion Of the Resultsmentioning

confidence: 99%

Granular materials based on expanded sands and their production waste

Miryuk¹,

Zagorodnuk²

2022

KIMS/CUMR/MShKP

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“…For mixing the compositions a "MgO-micro stuff agent" used the magnesium chloride solution with density of 1.2 g/cm 3 . The ratio of MgO: MgCl2: H2O in the test was taken such that the normal density (NG) of the test was approximately the same and equal to 48-52%, which corresponds to the synthesis of stable hydroxochloride magnesium.…”

Section: Resultsmentioning

confidence: 99%

“…To provide high efficiency of mineral microfillers are important not only their properties, but and enter their number and dispersion. It should be noted that the amount of mineral additives in many cases are chosen rather arbitrarily and varies from fractions of percent to several tens percent by weight of binder (cement, magnesium oxide, gypsum) [3,4,5,6,10,12,13,15]. Dispersion additives are not always analyzed and in some cases in publications are not specified.…”

Section: Theoretical Evaluation Of the Influence The Quality And Disp...mentioning

confidence: 99%

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Improving Water Resistance of Magnesium Binding Substances by the Introduction of Mineral Fillers

Zyryanova

Lytkina

Ochur-Ool

2021

DDF

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Magnesia binders provide strength to the stone, but have one drawback-low resistance and salt resistance. Increasing water and salinity tolerance, mechanical strength of the hardening magnesia binders can be achieved by introducing the system of micro-aggregates. The quality criteria that determine the activity of the micro filler are: high chemical resistance to water, aggressive media, high mechanical strength. Among the effective microfillers composite magnesia binders include diopside, wollastonite. It is shown that the introduction of 60-80 wt%. wollastonite or diopside with a specific surface of 2000-3500 cm2/g provides significant improvement in strength and water resistance that allows you to lengthen the lifespan and maintain the required quality of products based on composite of magnesia binders.

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“…Technologies of unfired fillers provide for the production of composite granules in which filler particles are bonded with an astringent. Particles forming porosity are used as fillers [25]. Increasing requirements for the construction and technical properties of lightweight concrete necessitates the expansion of the raw material base due to available sources.…”

Section: Granular Materialsmentioning

confidence: 99%

Magnesia Composites Formation as a Result of Furniture Production Wood Waste Processing

Miryuk

2022

Environmental and Climate Technologies

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The article outlines the problem of accumulation of short-fibered waste generated during chipboard sawing. Intense impact on the material determines a high level of technological availability of wood waste. The research objective is to create magnesia composite materials for various purposes based on chipboard processing waste. Moulding sands containing caustic magnesite, fly ash, aluminosilicate ash microsphere, wood waste and magnesium chloride solution have been studied. Change in the ratio of moulding sands’ components provided production of finely dispersed composite material, and granules of cylindrical and spherical shapes. Composite materials of coarse-pored structure have been developed on the basis of magnesia granules and hybrid magnesia-ash binder. Combination of layers of finely dispersed and coarse-pored materials has been proposed to form composites of variotropic structure with density 780–840 kg/m3 and strength 9.7–11.9 MPa. Combined structures’ stability is achieved due to the high adhesive ability of magnesia binders and genetic commonality of various layers.

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Porous Magnesia Compositions with Various Fillers

Cited by 5 publications

References 9 publications

Granular materials based on expanded sands and their production waste

Granular materials based on expanded sands and their production waste

Improving Water Resistance of Magnesium Binding Substances by the Introduction of Mineral Fillers

Magnesia Composites Formation as a Result of Furniture Production Wood Waste Processing

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