scholarly journals INVESTIGATION OF PROPERTIES OF MODIFIED BASALT FIBERS

2018 ◽  
Vol 4 ◽  
pp. 43-48
Author(s):  
Volodymyr Gots ◽  
Petr Palchyk ◽  
Oksana Berdnyk
Keyword(s):  
Thermal Insulation ◽  
Operating Temperature ◽  
Structural Characteristics ◽  
Basalt Fiber ◽  
Acoustic Properties ◽  
Sound Insulation ◽  
Porous System ◽  
Basalt Fibers ◽  
Insulation Materials ◽  
Continuous Basalt Fiber

Thermophysical, physical-mechanical and acoustic characteristics of a rough continuous basalt fiber under the influence of operating factors and a corrosive environment are studied. It is shown that the production of protective materials with high thermophysical and acoustic properties is possible when creating a porous system with a known texture characteristic of pores of different classes, purposes and connections. An influence of the porous system of rough continuous basalt fiber on the operational properties of flexible heat and sound insulation products and materials is studied. The requirements of normative documents on thermal protection of buildings and structures have caused a constant tendency from the creation of new materials that ensure reliable operation of structures and equipment in the conditions of intensive influence of destructive factors of external influence. This led to an increase in requirements for walling wall materials that are used to fill openings in frame construction, or as an independent structural and thermal insulation material when building buildings with load-bearing walls. They are presented with a set of requirements that combines: physical and mechanical, chemical, hygienic, thermophysical, decorative and finishing, and other properties of the material. In this connection, there is a need to create materials that, having a small average density and high strength, are able to withstand the temperature loads, and the influence of an aggressive environment. It is determined that the performance characteristics of flexible heat and sound insulation materials are directly proportional to the degree of porosity of the composite materials and their structural characteristics. It is shown that the increase in the operating temperature of these materials, sound and thermal resistance is determined by the chemical and mineralogical composition of the initial materials and their structural characteristics. The influence of the mechanism of selective leaching of coarse continuous basalt fibers on their texture characteristics and the operating temperature zone is studied. The resulting material is produced from environmentally friendly raw materials using a one-stage technology without harmful effects on the environment and, unlike thermal insulation materials based on polymers or asbestos, has no harmful effect on the human body, meets the requirements of the European Union for the protection of the environment and sanitary and hygienic standards.

Review of research on basalt fibers and basalt fiber-reinforced composites in China (I): Physicochemical and mechanical properties

2020 ◽  
pp. 096739112097739
Author(s):  
Li Yan ◽  
Faliang Chu ◽  
Wanyong Tuo ◽  
Xiaobo Zhao ◽  
Yan Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Insulation ◽  
Sound Absorption ◽  
Acid Corrosion ◽  
Glass Fibers ◽  
Basalt Fiber ◽  
Research Progress ◽  
Sound Insulation ◽  
Basalt Fibers ◽  
Hygroscopic Properties

This paper reviewed the research progress in China on the durability, acid and alkali corrosion resistances, thermal insulation, sound insulation, and hygroscopic properties of basalt fibers (BFs) as well as the physicochemical and mechanical properties of BF-reinforced resin composites. The acidity coefficient and pH value of BFs and glass fibers (GFs) were tested, which showed that BFs had better chemical stability. Scanning electron microscopy observations showed that the acid corrosion of BFs gradually occurred from the outside to the inside, whereas the alkali corrosion of BFs occurred nearly simultaneously both inside and outside. Moreover, the reasons for these results were analyzed from a chemical reaction perspective. BFs met the thermal conductivity and sound absorption coefficient requirements of building thermal insulation and sound absorption materials. The hygroscopicity of BFs was 1/8–1/6 that of GFs, and BFs also had a smaller dielectric loss angle. Tests confirmed that BFRC exhibited great high-temperature resistance. As the short BF content increased, the flexural strength, splitting tensile strength and impermeability of BFRC significantly improved, and an optimal fiber length and content were proposed. A comparison showed that the mechanical properties of BF-reinforced resin were generally better than those of GF-reinforced resin. Finally, this review identified some concepts to be studied in this field and prospects for possible future research directions. [Formula: see text]

scholarly journals Foundation Research on Physicochemical Properties of Mine Insulation Materials

Coatings ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 355
Author(s):  
Chuanbin Hou ◽  
Song Xin ◽  
Long Zhang ◽  
Shangxiao Liu ◽  
Xiao Zhang
Keyword(s):  
Compressive Strength ◽  
Thermal Insulation ◽  
Test Specimen ◽  
Heat Insulation ◽  
Mining Industry ◽  
Basalt Fiber ◽  
High Strength ◽  
Superior Performance ◽  
Insulation Materials ◽  
Insulation Effect

The known cooling methods for the high-temperature operating environment of a mine mainly include ventilation, refrigeration, heat insulation, and individual protection. Among them, the superior performance and wide application of the heat insulation materials have attracted the attention of the coal mining industry. In this paper, three types of mineral insulation materials were prepared using basalt fiber, glass fiber, vitrified microbeads in combination with cement, sand, high-strength ceramsite, water, etc. In addition, the thermal conductivity and compressive strength of the prepared specimens were assessed. The results show that the test specimen containing basalt fiber had a great thermal insulation effect and achieved the required compressive strength. Furthermore, according to the COMSOL simulation results, the test specimen containing basalt fiber had a better thermal insulation effect than the ordinary concrete materials. Therefore, the research results of this article have guiding significance to search for new mine thermal insulation materials.

scholarly journals Basalt fibers: the green material of the XXI-century, for a sustainable restoration of historical buildings

2016 ◽  
Vol 1 (2) ◽  
pp. 25
Author(s):  
Giacomo Di Ruocco
Keyword(s):  
New Technologies ◽  
Basalt Fiber ◽  
Acoustic Properties ◽  
Basalt Fibers ◽  
National Agency ◽  
Synthetic Fibers ◽  
Energy Impact ◽  
Acoustic Insulation ◽  
Composites Materials ◽  
High Degree

<p>In recent decades in the construction industry, the need to experience consolidation techniques with non-corroding materials is being developed. Studies and tests have been led about integration of basalt fibers in concrete structures: they have shown improvements both in terms of mechanical strength and in terms of intervention of consolidation durability<strong> (</strong>Ólafsson<strong>,</strong><strong> </strong>Thorhallsson, 2009). The basalt rock can be used to produce not only basalt bars, but also fabrics, paddings, continuous filaments and basalt network. Some applications of these basalt-composites materials concern the consolidation of civil construction structures, thermal and acoustic insulation, security clothing, etc. Some years ago the Italian company ENEA (National Agency for New Technologies, Energy and Sustainable Economic Development) has signed an agreement with HG GBF (one of the world's leading companies in the production of basalt fibers), for the verification of possible applications of this material in the construction field but also in the nautical and automotive ones. The use of basalt fiber in construction could present a series of advantages: natural origin, a cycle of production to lower energy impact compared to other fibers, a high chemical inertia and thus a high degree of durability, low thermal conductivity, good mechanical and thermo-acoustic properties, high fire resistance, a competitive cost and, in general, more environmental compatibility and sustainability than other synthetic fibers.</p>

scholarly journals MINERAL WOOL COMPOSITE WITH THE USE OF SAPONITE-CONTAINING MINING INDUSTRY WASTE

2020 ◽  
Vol 3 (3) ◽  
pp. 21-27 ◽  
Author(s):  
T. Drozdyuk ◽  
Arkadiy Ayzenshtadt ◽  
M. Frolova ◽  
Rama Shanker Rama Shanker Verma
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Thermal Insulation ◽  
Mining Industry ◽  
Basalt Fiber ◽  
Linear Increase ◽  
Mineral Wool ◽  
Basalt Fibers ◽  
Thermal Insulating ◽  
Coefficient Of Thermal Conductivity

the paper shows the possibility of producing a thermal insulating composite based on basalt fibers and sapo-nite-containing mining waste. A method for manufacturing thermal insulating composites from hydro-mass with different contents of the mixture components is proposed. Basalt fibers were used as a filler, and pre-mechanoactivated saponite-containing material (SCM) was used as a binder. It was found experimentally that depending on the composition of composites, the coefficient of thermal conductivity varies from 0.1109 to 0.1342 W/(m•K), and the compressive strength – from 0.45 to 0.93 MPa. In addition, it was found that thermal modification of composites at temperatures up to 1200°C significantly (up to 3 times) increases the compressive strength of composites, while not affecting the coefficient of thermal conductivity. The ex-periments to determine the conductivity of the composite “basalt fiber – SСM” depending on its moisture content showed that the obtained composite is characterized by intense and linear increase in the values of conductivity when the humidity of the sample to 12% and further increase in humidity practically does not change the values of the coefficient of thermal conductivity. Comparison of the studied thermal insulation composite with known structural thermal insulation materials in terms of its thermal insulation and strength characteristics showed that it is comparable to gas and foam blocks. It should also be noted that this material is environmentally safe and can withstand high temperatures without collapsing.

Utilisation of Polyurethane (PUR) Granulate in Development of New Insulating Materials

2014 ◽  
Vol 1000 ◽  
pp. 133-136
Author(s):  
Jiri Zach ◽  
Vítězslav Novák ◽  
Jitka Peterková
Keyword(s):  
Human Health ◽  
Thermal Insulation ◽  
Industrial Waste ◽  
Raw Materials ◽  
Acoustic Properties ◽  
Added Value ◽  
Insulating Materials ◽  
Insulation Materials ◽  
Secondary Raw Materials ◽  
New Perspective

At present we can often see a development of new perspective materials using waste raw materials and not only in building industries. Still growing industrial waste amount together with not utilizable substances whose recycling is quite energy and finance demanding are the reasons. In addition it also brings a notable stress for the environment which further influences human health. The paper deals with a development of insulating materials based on waste PUR granulate generated as waste during PUR foam panel shaping. The aim was to develop insulating materials with good thermal insulation and eventually acoustic properties as suitable alternatives to present commonly used insulation materials in the market. Cement and subsequently PUR foams were selected as binders for waste granulate. Utilization of secondary raw materials in order to get new insulating materials with high added value is contribution of such a development.

scholarly journals Study of thermal conductivity coefficient of basalt fiber insulation at various temperature conditions

Vestnik IGEU ◽  
2021 ◽  
pp. 15-24
Author(s):  
E.R. Bazukova ◽  
Yu.V. Vankov ◽  
S.O. Gaponenko ◽  
N.N. Smirnov
Keyword(s):  
Thermal Conductivity ◽  
Thermal Insulation ◽  
Thermophysical Properties ◽  
Thermal Conductivity Coefficient ◽  
Thermal Protection ◽  
Operating Temperature ◽  
Basalt Fiber ◽  
Electric Heater ◽  
Insulating Materials ◽  
Temperature Conditions

Industrial thermal insulation fibrous materials (mineral wool and fiberglass products) are mainly used for thermal protection of the systems transporting high-temperature heat carriers. The data known in the scientific literature about the effect of insulation density and operating temperature conditions on the thermophysical properties of materials made of basalt fiber differ significantly. Taking these data into account let us improve the accuracy of thermal calculations and the validity of design solutions for thermal protection of industrial networks up to 60 %. The aim of the study is to obtain data on the change of the heat-shielding properties of insulating materials made of basalt fiber of various densities, depending on the temperature conditions of operation. An experimental study of the thermophysical properties of several samples of basalt fiber insulation has been carried out on a laboratory bench. The density of a constant heat flux passing through the sample has been determined by the additional wall method. The experimental unit consists of a cylindrical metal tube with a built-in electric heater, on the top of which a heat-insulating basalt fiber of various densities is placed. The temperature on the pipe surface is changed in the range from 50 to 350 оC. The dependence of the thermal conductivity coefficient of thermal insulation basalt fiber samples on its density and operating temperature of the material is obtained. The research results show that thermal conductivity coefficient of basalt fiber insulation increases with temperature increase of the pipeline surface. The lower the value of the material density is, the higher the increment of the thermal conductivity coefficient is. The obtained results enrich the data about the dependence of the thermal conductivity of fibrous heat-insulating materials on density and temperature (for cases of operation at high temperatures). Considering the density of the examined materials made of basalt fiber when determining the thermal conductivity makes it possible to increase the accuracy of calculations up to 20 % and temperature modes of operation up to 60 %. The results obtained can be applied to find the thickness of the thermal insulation of pipelines and heat losses in the networks.

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