Optimization of Technological Modes of Obtaining the Sol-Gel Method, High-Purity Silica With Particles of Nanoscale Level

Selyaev, V.P.; Sedova, Anna Alekseevna; Kupriyashkina, L. I.; Osipov, Anatoliy Konstantinovich

doi:10.32683/0536-1052-2018-710-2-5-12

Cited by 2 publications

(3 citation statements)

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“…This section explores patented technical solutions for producing oxide system products by incorporating waste from metallurgical production. The aim is to understand the structure formation mechanism in samples and mass transfer conditions during heating or physical impact [36,38,[40][41][42][43][131][132][133][134][135][136][137][138][139][140][141][142]. In a patent by the authors of [131], microsilica was added to the concrete mix as an aqueous suspension, comprising 40%-70% of the total volume.…”

Section: Patent Research Into Methods Of Recycling Waste and Its Use ...mentioning

confidence: 99%

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Analysis of Experience in the Use of Micro- and Nanoadditives from Silicon Production Waste in Concrete Technologies

Karlina,

Gladkikh

2023

Minerals

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The integration of nanotechnology across various industries has significantly enhanced product quality and manufacturing technologies for diverse materials. Within the construction sector, the adoption of nanomaterials has sparked the advent of innovative construction methods. Extensive studies have been conducted on various nanomaterials, particularly micro- and nanosilica, exploring their use as partial substitutes for cement in concrete formulations. This study aimed to furnish a comprehensive overview of silica’s impact on concrete properties in civil engineering and road construction. Environmental concerns and potential hazards necessitate the development of strategies for managing industrial by-products. Metallurgical processes generate several such by-products, among which is silica fume—a residue from smelting in the silicon and ferrosilicon industries. Waste silica dust and slurries have proven highly effective in creating high-strength, high-performance concrete. The study presents a literature review focusing on micro- and nanosilica derived from production waste at ferroalloy and silicon plants. It includes a comparative analysis of the primary characteristics of microsilica from various sources and examines the extensive use of microsilica as a modifying additive in building materials. Analyzing different concrete compositions with and without fumed silica determined the ranges of results for each indicator. The incorporation of micro- and nanosilica into the concrete mix demonstrated its efficacy. The morphology of waste silica particles, characterized by the smooth and spherical surfaces of micro- and nanosilica particles, significantly influences the workability properties of the concrete.

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Section: Patent Research Into Methods Of Recycling Waste and Its Use ...mentioning

confidence: 99%

“…This process yields microsilica with high purity and a dispersion ranging between 0.062 and 0.097 microns. Patent [140] describes a production process for finely dispersed amorphous microsilica using the sol-gel method involving diatomaceous earth and sodium hydroxide.…”

Section: Patent Research Into Methods Of Recycling Waste and Its Use ...mentioning

confidence: 99%

Analysis of Experience in the Use of Micro- and Nanoadditives from Silicon Production Waste in Concrete Technologies

Karlina,

Gladkikh

2023

Minerals

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“…There are some research dedicated to mineral content control in hardened cement paste [5], the result of which define the decrease of thermal conductivity coefficient of interpore partitions in foamed concrete by 6.5-24 % with the maximum allowable content of calcium aluminate (C 3 A) and calcium alumoferrite (C 4 AF) in Portland cement and with the minimum allowable content of alite (C 3 S). Natural and artificial microsilica [6] is widely used to improve thermal insulation properties of materials, investigations are conducted on the use of carbon nanotubes [7] and geopolymers [8]; however, such technological methods can considerably raise the price of the end product. Thermal conductivity was found to decrease with addition of silica sol (up to 35%) and wood fiber (up to 30%) [9].…”

Section: Introductionmentioning

confidence: 99%

Naturally cured foamed concrete with improved thermal insulation properties

2018

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The paper is dedicated to investigation on improvement of thermal insulation properties of non-autoclaved concrete by increasing aggregate stability of foamed concrete mixture. The study demonstrates influence of mineral admixtures on the foam stability index in the mortar mixture and on decrease of foamed concrete density and thermal conductivity. The effect of mineral admixtures on thermal conductivity properties of non-autoclaved concrete was assessed through different ways of their addition: to the foam and to the mortar mixture. The admixtures were milled up to the specific surface area of 300 and 600 m2/kg using an AГO-9 centrifugal attrition mill with continuous operation mode (Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences, Novosibirsk). Laboratory turbulent foam concrete mixer was used to prepare foamed concrete. Thermal conductivity coefficient was defined by a quick method using “ИTП-MГ 4 “Zond” thermal conductivity meter in accordance with the regulatory documents. The impact of modifiers on the foam structure stability was defined using the foam stability index for the mortar mixture. The research demonstrated the increase in stability of porous structure of non-autoclaved concrete when adding wollastonite and diopside. Improvement of thermal and physical properties was demonstrated, the decrease of thermal conductivity coefficient reaches 0.069 W/(m×°C)

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Optimization of Technological Modes of Obtaining the Sol-Gel Method, High-Purity Silica With Particles of Nanoscale Level

Cited by 2 publications

References 0 publications

Analysis of Experience in the Use of Micro- and Nanoadditives from Silicon Production Waste in Concrete Technologies

Analysis of Experience in the Use of Micro- and Nanoadditives from Silicon Production Waste in Concrete Technologies

Naturally cured foamed concrete with improved thermal insulation properties

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