Effect of Mechanically Activated Nepheline-Syenite Additive on the Physical–Mechanical Properties and Frost Resistance of Ceramic Materials Composed of Illite Clay and Mineral Wool Waste

Pranckevičienė, Jolanta; Pundienė, Ina

doi:10.3390/ma16144943

Cited by 3 publications

(1 citation statement)

References 62 publications

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“…For the production of ceramic bricks, mineral wool waste, glass waste, high alumina fly ash, and ceramic tile polishing waste are often chosen as a leaning agent [1][2]. Mineral wool waste is used as an additive to Portland cement [3], in the development of ceramic building materials [2], [3], [4], in the production of masonry mortar [5].…”

Section: Introductionmentioning

confidence: 99%

Study of clay raw materials with Korolek technogenic waste for the production of ceramic bricks

Kashetova,

Kozhas

2023

tbus

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The use of industrial waste in the production of building materials is an urgent task at present. Studies on the use of mineral wool waste in the manufacture of ceramic bricks have been carried out. For the preparation of experimental samples of ceramic bricks used clay deposit, as heaters and intensifiers of sintering – waste production of mineral wool. Chemical composition of investigated components is given. The study of mineralogical and phase composition of raw materials was carried out by petrographic, X-ray phase, IR-spectroscopic, electron-microscopic methods of analysis and DTA. During the experiment such properties of samples as cracking temperature; end shrinkage moisture; relative shrinkage; drying time to residual moisture content of 8%; mechanical strength in compression were tested. As a result of the tests, the influence of Korolek on the drying properties of ceramic samples was established. Thus, an increase in the content of Korolek in the samples, improved the crack resistance, relative shrinkage, drying time to residual moisture. The results of the research showed a non-linear dependence of physical and mechanical properties of the samples on the content of Korolek. The best values of mechanical strength were achieved when the Korolek content was 40% of the total mass of the manufactured sample. The proposed composition corresponds to the properties of ceramic bricks above grade M150-175.

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Section: Introductionmentioning

confidence: 99%

Study of clay raw materials with Korolek technogenic waste for the production of ceramic bricks

Kashetova,

Kozhas

2023

tbus

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Analysis of Modern Designs of Centrifugal Mixers for Bulk Materials

Федорова,

Капранова

2024

Южно-Сибирский Научный Вестник

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Процесс смешения сыпучих материалов актуален для многих производственных отраслей, в частности, строительной, пищевой, химической. Решение двоякой проблемы практически одновременного обеспечения эффективности и интенсивности данной технологической операции, обычно осложненной проявлением сегрегации, связано с поиском целесообразных направлений совершенствования смесительного оборудования. С учетом традиционного деления данных устройств по способу смешения (пневматическому, гравитационному, механическому) выполнен анализ современных конструкций аппаратов центробежного типа для смешения сыпучих компонентов на примере песчаных составов разной истинной плотности вещества. Опираясь на классическую схему сортировки центробежных устройств (по принципу действия, режиму работы, назначению/совмещению этапов, расположению рабочих органов, форме смесительной камеры и т.п.), предложена спецификация данных конструкций по четырем критериям (типу смесительных элементов, форме смесительной насадки, типу смешиваемых компонентов, форме направляющего элемента). Приведены примеры соответствующего центробежного оборудования, имеющие выраженные конструктивные особенности. Более подробно рассмотрены конструкциях аппаратов, разделяемых по форме рабочего органа в виде смесительной насадки (конические и цилиндрические). Равномерность разбрасывания материалов компонентов по объему аппарата с цилиндрической формой рабочего органа определяется дополнительным оснащением рабочей зоны смесительными элементами. Согласно предложенной спецификации конструкций центробежных аппаратов выполнен анализ их отличительных признаков в зависимости от типа смесительных элементов (лопастных и канальных). Показано, что для проектируемого смесителя песчаных компонентов целесообразно использовать центробежный тип устройств с цилиндрическими насадками при установке дополнительных радиальных элементов (каналов, лопаток и т.п.) для обеспечения наиболее равномерного распределения компонентов в зоне их смешения. The process of mixing bulk materials is relevant for many manufacturing industries, in particular, construction, food, and chemicals. The solution to the double problem of almost simultaneously ensuring the efficiency and intensity of a given technological operation, usually complicated by the manifestation of segregation, is associated with the search for appropriate directions for improving mixing equipment. Taking into account the traditional division of these devices according to the mixing method (pneumatic, gravitational, mechanical), an analysis of modern designs of centrifugal-type devices for mixing bulk components was carried out using the example of sand compositions of different true densities of the substance. Based on the classical scheme for sorting centrifugal devices (according to the principle of operation, mode of operation, purpose/combination of stages, location of working parts, shape of the mixing chamber, etc.), a specification of these structures is proposed according to four criteria (type of mixing elements, shape of the mixing nozzle, type of components to be mixed, shape of the guide element). Examples of corresponding centrifugal equipment with pronounced design features are given. The designs of devices divided according to the shape of the working body in the form of a mixing nozzle (conical and cylindrical) are considered in more detail. The uniformity of the dispersion of component materials throughout the volume of an apparatus with a cylindrical working body is determined by the additional equipment of the working area with mixing elements. According to the proposed specification for the designs of centrifugal devices, an analysis of their distinctive features was carried out depending on the type of mixing elements (blade and channel). It is shown that for the designed mixer of sand components it is advisable to use a centrifugal type of device with cylindrical nozzles when installing additional radial elements (channels, blades, etc.) to ensure the most uniform distribution of components in the mixing zone.

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Study of mechanical properties of building ceramics with the addition of non-traditional raw materials

Khudyakova,

Kotova,

Garkusheva

et al. 2024

Construction Materials

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The current economic situation and increased attention to environmental protection encourage manufacturers of building materials, in particular ceramic bricks, to look for alternative types of raw materials that make it possible to reduce its cost with good quality of finished products. Mining waste is especially promising, among which peridotites stand out, which have huge reserves and are practically not used. The purpose of the work is to obtain building ceramics with the addition of peridotite and study its mechanical properties.The chemical and mineralogical compositions of raw materials have been determined. Silicon and aluminum oxides account for 78.5% in clay and 61% in peridotites.The latter are characterized by a high content of calcium, magnesium and iron oxides (34.65%). Clay is composed of clay minerals, as well as quartz and feldspar. Tremolite, enstatite and olivine are present in peridotites. The dependence of the mechanical strength of ceramic samples on their firing temperature, the content of the additive and the degree of its grinding has been established. The optimal amount of peridotite is 10%, at which the compressive strength has the maximum value over the entire grinding range of the additive. With an increase in the firing temperature to 1050оC, a slow increase in the strength of the samples occurs. At 1100оC, there is a sharp jump in strength parameters, which increase by 3.6–4.7 times, depending on the granulometric composition of the additive.The main properties of the obtained ceramics were determined. It has been established that peridotites are a promising additive for the production of ordinary bricks with a compressive strength of up to 60 MPa and an average density of up to 2400 kg/m3.

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Effect of Mechanically Activated Nepheline-Syenite Additive on the Physical–Mechanical Properties and Frost Resistance of Ceramic Materials Composed of Illite Clay and Mineral Wool Waste

Cited by 3 publications

References 62 publications

Study of clay raw materials with Korolek technogenic waste for the production of ceramic bricks

Study of clay raw materials with Korolek technogenic waste for the production of ceramic bricks

Analysis of Modern Designs of Centrifugal Mixers for Bulk Materials

Study of mechanical properties of building ceramics with the addition of non-traditional raw materials

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