scholarly journals Concretes Made of Magnesium–Silicate Rocks

Minerals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 441
Author(s):  
Lyudmila I. Khudyakova ◽  
Evgeniy V. Kislov ◽  
Irina Yu. Kotova ◽  
Pavel L. Paleev
Keyword(s):  
Environmental Protection ◽  
Building Materials ◽  
Concrete Strength ◽  
Control Sample ◽  
Mining Industry ◽  
Magnesium Silicate ◽  
National Standards ◽  
Complete Replacement ◽  
Concrete Production ◽  
Silicate Rocks

At present, there is a shortage of high-quality feedstock to produce widely used building materials—concretes. Depletion of natural resources and growing restrictions on their extraction, in connection with environmental protection, necessitate the search for an equivalent replacement for conventional raw materials. Magnesium–silicate rocks are a waste of the mining industry. We researched the possibility of using these rocks as coarse and fine aggregates in heavy concrete production. Following the requirements of the national standards, we studied the physical and mechanical characteristics of the obtained material. It was found that the strength of concrete, made of magnesium–silicate rock coarse aggregate, at the age of 28 days of hardening is within 28 MPa, while the strength of the control sample is 27.3 MPa. Replacing quartz sand with dunite sand also leads to an increase in concrete strength (~4%). Complete replacement of aggregates facilitates an increase in strength by 15–20% than the control sample. At the same time, the density of the obtained materials becomes higher. Concretes have a dense structure that affects their quality. Concrete water absorption is within 6%. The fluxing coefficient is 0.85–0.87. The application of magnesium–silicate rocks in concrete production enables the complete replacement of conventional aggregates with mining waste without reducing the quality of the obtained materials. Furthermore, the issues of environmental protection in mineral deposit development are being addressed.

Legal framework for improvement of agroecology by cultivating jerusalem artichoke

2020 ◽  
pp. 59-66
Author(s):  
Mykhailo Kosmii ◽  
Vasyl. Kasiianchuk ◽  
Ruslan Zhyrak ◽  
Ivan Krykhovetskyi
Keyword(s):  
Environmental Protection ◽  
Organic Farming ◽  
Alternative Energy ◽  
Building Materials ◽  
Environmental Law ◽  
Jerusalem Artichoke ◽  
Legal Framework ◽  
Legal Regulation ◽  
Practical Application ◽  
Scientific Cognition

The purpose of this paper is to analyze and research the legal mechanisms which make it possible to improve agroecology through the organization of cultivation of Jerusalem artichoke.Methodology. The methodology includes comprehensive analysis and generalization of available scientific, theoretical, practical and applied material and development of relevant conclusions and recommendations. During the research, the following methods of scientific cognition were used: dialectical, terminological, historical and legal, logical and normative, systemic and structural, functional, normative and dogmatic, generalization methods. Results. The process of analysis and research highlighted the possibilities of cultivating Jerusalem artichoke for improving agroecology, namely improving the ecological state of the atmosphere air and soil, preparing them for organic farming. The article contains examples of practical application of tubers of Jerusalem artichoke and herbage for the production of therapeutic and prophylactic products, alternative energy and highly efficient building materials. Scientific novelty. The study found that the authors summarized and systematized the levels of legal regulation in the field of using Jerusalem artichoke for improving agroecology, preparing soil for organic farming, in particular: the inter-sectoral level which covers the interaction of agricultural and environmental law in terms of cultivation and use of Jerusalem artichoke; the level of integrated environmental and legal regulation; level of individual resource (floristic) legal regulation; the level of environmental protection (anthropoprotection) legislation.Practical importance. The results of the study can be used in law-making and environmental protection activities related to issues of cultivating and using the Jerusalem artichoke as a means of improving agroecology.

Increase of Efficiency of Operation of Autoclaved Gas Concrete Production by the Shock Technology at Egorievsky Building Materials Factory

2018 ◽  
Vol 759 (5) ◽  
pp. 16-19
Author(s):  
A.Yu. SMIRNOV ◽  
◽  
A.M. RUBLEV ◽  
A.A. BARANOV ◽  
M.V. AKULOVA ◽  
...  
Keyword(s):  
Building Materials ◽  
Concrete Production

Application of High Ti-Bearing Blast Furnace Slag in Field of Building Materials

2014 ◽  
Vol 1052 ◽  
pp. 392-395 ◽  
Author(s):  
Li Xia He
Keyword(s):  
Sustainable Development ◽  
Blast Furnace ◽  
Environmental Protection ◽  
Blast Furnace Slag ◽  
Building Materials ◽  
Waste Material ◽  
Great Production ◽  
Bf Slag ◽  
Furnace Slag

High Ti-bearing blast furnace (BF) slag is the smelting waste of vanadium titano-magnetite. It has great production but low utilization. The high Ti-bearing BF slag is used in building materials industry, which recycles waste material, saves resources and energy, benefiting environmental protection and achieving sustainable development of resources. Study on the recycling of high Ti-bearing BF slag will be an important subject of our researches in future.

scholarly journals Use of Non-Traditional Types of Flour in the Flour Culinary Production (Pancakes)

Food Industry ◽  
2020 ◽  
Vol 5 (4) ◽  
pp. 33-37
Author(s):  
Vladislav Tiunov ◽  
Olga Chugunova ◽  
Aleksandr Arisov
Keyword(s):  
Wheat Flour ◽  
Raw Materials ◽  
Food Additives ◽  
Control Sample ◽  
Food Products ◽  
Biologically Active ◽  
Optimal Dosage ◽  
Soya Flour ◽  
Complete Replacement ◽  
Biological Value

Currently, Strategy for Improving the Food Products Quality in the Russian Federation until 2030 identifies the need to develop new food products as one of the important state tasks; the quality improvement of raw materials used, the nutritional and biological value of finished products and expanding its range are an urgent area of scientific research. Flour culinary products are no exception. These products made from traditional wheat flour of the highest grade have low nutritional value, high calorie, lack of vitamins and minerals. In order to increase the biological value of flour culinary products, a man adds food additives and biologically active substances; uses non-traditional raw materials for the production. The article considers the possibility of using non-traditional flour types mixtures instead of wheat flour of the highest grade in the production of flour culinary products (pancakes). The researchers developed the optimal dosage for adding mixtures of rice and corn, rice and amaranth, rice and soya flour to the product formulations. They studied comprehensively the regulated indicators of product quality and safety: organoleptic, physical and chemical, microbiological; run the comparative analysis of samples from non-traditional types of flour with a control sample. The authors developed the pancakes technology in the form of baking it in a convection steamer with a complete replacement of wheat flour with a mixture of rice and corn, rice and amaranth, rice and soya flour. They compiled technological maps and formulated a technical document package on the products range.

scholarly journals Using scanned images to estimate salt formation on the surface of cement composites

Vestnik MGSU ◽  
2020 ◽  
pp. 1523-1533
Author(s):  
Vladimir T. Erofeev ◽  
Victor V. Afonin ◽  
Tatiana F. Elchishcheva ◽  
Marina M. Zotkina ◽  
Irina V. Erofeeva
Keyword(s):  
Building Materials ◽  
Control Sample ◽  
Cement Composite ◽  
Operating Conditions ◽  
Cement Composites ◽  
High Humidity ◽  
Grayscale Image ◽  
Salt Formation ◽  
Scanned Images ◽  
Composite Samples

Introduction. An engineering method is proposed for assessing salt formation on the surface of cement composites exposed to adverse operating conditions. The technique is based on the histogram method used to determine the dominant brightness of the half-tone image of scanned cement composites. The criterion for ranking composites is a relative dimensionless value –– a metric obtained by comparing the brightness of a grayscale image with the brightness level of white. Materials and methods. We selected three types of compositions of composites in the amount of 21 items; each of them contains three samples –– a control sample and samples exposed to high humidity and positive temperatures for 15 and 45 days. Each composition is represented by a scanned raster image of the sample surface. The images are further subjected to digital processing using a software program written in the C++ programming language and the OpenCV technical vision library. This allows you to use the available methods and classes to develop algorithms to solve the problem in question and to convert a full-color RGB image to a grayscale image. Such images are used to analyze histograms, which determine the dominant level of brightness to determine the numerical metric for quantifying the salt formation on the surface of cement composite samples on the basis of their scanned images. Results. A description of the software algorithm, used to detect salt formation on the surface of cement composite specimens that have passed performance tests under high humidity conditions at positive temperatures, is presented. The method of ranking cement composite samples using the values of their dominant brightness relative to the brightness of control samples is shown. The comparative analysis of the study is presented in the form of numerical data and explanatory diagrams. Conclusions. Software modeling is employed to demonstrate the expediency of the methodology for the assessment of salt formation on the surface of cement composites and other building materials prone to salt formation.

scholarly journals Study on evaluating the effectiveness of compost fertilizer from jackfruit peel and fiber with various local agricultural materials on Green Mustard (Brassica juncea)

2021 ◽  
Vol 332 ◽  
pp. 07001
Author(s):  
Thanh Tran ◽  
Van Thi ◽  
Tran Thi Bich Phuong ◽  
Loc Huu Ho ◽  
Le Thi Anh Hong
Keyword(s):  
Germination Rate ◽  
Organic Fertilizer ◽  
Control Sample ◽  
Organic Substrate ◽  
National Standards ◽  
Organic Carbon Content ◽  
Organic Substrates ◽  
Coconut Fiber ◽  
Three Samples ◽  
Agricultural Materials

In recent years, jackfruit production in Vietnam has been growing very strongly in both quantity and quality. However, most of the jackfruit is harvested and processed for meat, the rest is the jackfruit peels, and fibers are discarded, which will affect environmental sanitation. The study aims to enhance the value of jackfruit by taking advantage of nutrient ingredients in the peel and fiber of jackfruit to blend into organic fertilizer. Initial results show that the compost substrate samples mixed with rice husk ash and coir and the organic substrate sample mixed with coconut fiber had the best quality. Tested nutritional ingredients include including humidity is 76.1%, total organic carbon content is 27.3%, fulvic acid is 0.9%, humid acid is 0.9%, total nitrogen is 0.85%, total phosphorus is 0.57% after 35 days of incubation. Their quality meets the national standards of QCVN 01-189: 2019/BNNPTNT on fertilizer quality. After testing all three samples of organic substrates on the green mustard with germination rate (%), a number of branches, and total fresh weight (g), the results showed that test plants are grown with the compost from the shell - jackfruit fiber mixed with coconut fiber developed better than the control sample.

scholarly journals IMPROVING THE EFFICIENCY OF FIBRE CONCRETE PRODUCTION

2020 ◽  
pp. 4-9
Author(s):  
V. Nelyubova ◽  
V. Babaev ◽  
Nataliya Alfimova ◽  
S. Usikov ◽  
O. Masanin
Keyword(s):  
Building Materials ◽  
Production Efficiency ◽  
Raw Materials ◽  
Basalt Fiber ◽  
Operational Reliability ◽  
Fiber Reinforced Concrete ◽  
Technological Parameters ◽  
Optimal Method ◽  
Physicomechanical Characteristics ◽  
Concrete Production

fiber concrete is one of the types of effective building materials that ensure the operational reliability of structures due to a set of unique properties. However, the maximum physicomechanical characteristics of this type of products are achieved only if the fiber is evenly distributed in the concrete matrix and the optimum ratio of raw materials is reached. In this connection, the aim of the work was to increase the production efficiency of fiber-reinforced concrete by optimizing the formulation and technological parameters of its manufacture. The optimal method of introducing the fiber into the concrete mix and the type of superplasticizer were previously determined, which allowed ensuring the maximum physicomechanical characteristics of the products. Optimization of prescription parameters was carried out using the method of mathematical planning of the experiment, where the amount of cement, superplasticizer and basalt fiber were varied. After processing the results, the dependences of the compressive strength on variable factors were obtained, which would allow to select the optimal dosages of raw materials for given mechanical characteristics of the products.

scholarly journals Sepiolite: A domestic mineral raw material for small and medium enterprises and environmental protection

2002 ◽  
Vol 56 (1) ◽  
pp. 30-34
Author(s):  
Miroslava Dojcinovic ◽  
Dana Simic ◽  
Miljenko Martic
Keyword(s):  
Physical Chemistry ◽  
Environmental Protection ◽  
Small And Medium Enterprises ◽  
Magnesium Silicate ◽  
Raw Material ◽  
Rubber Industry ◽  
Active Filler ◽  
Industrial Enterprises ◽  
Transformer Oils ◽  
Medium Enterprises

The paper presents the phases in the research of sepiolite - hydrated in fibrous magnesium silicate, and in the development of different products based on sepiolite, at the Institute of General and Physical Chemistry (IGPC). Also, a review on sepiolite world deposits, general properties and practical uses is given in the paper. An the IGPC sepiolite from the mine Golesh was investigated, concerning its uses in paints, as a pigment and rheological aditive; in the rubber industry, as an active filler; in sepiolite, papers, for purifying, waste gases in industry and homes and as a powder combined with sepiolite paper, to purify old transformer oils. It was concluded that a number of technologies based on sepiolite could be developed in small or medium industrial enterprises, which are of the strategic interest for Serbia, especially since domestic sepiolite deposites can be further developed and that some of these technologies are important in environment all protection.

Research on Mixing Ratio of Waste Mud Brick

2013 ◽  
Vol 368-370 ◽  
pp. 1103-1106
Author(s):  
Hai Long Wu ◽  
Bing Zhang Huang ◽  
Bang Biao Huang ◽  
Ji Zhen Zhu ◽  
Xi Qiang Li ◽  
...  
Keyword(s):  
Building Materials ◽  
Heat Insulation ◽  
Raw Materials ◽  
Mineral Resources ◽  
Green Building ◽  
National Standards ◽  
Mixing Ratio ◽  
Waste Reuse ◽  
Green Building Materials ◽  
The Relationship

In order to achieve green building materials, energy conservation, waste reuse purposes. Use city sewage sludge as part of the raw materials for production of shale brick is studied by experiments adopted the different mixing ratio, find matching and the relationship between the compressive strength. Experimental results show that the shale powder to add quality percentage is 40% of dry sludge, formed a burning brick, brick of various performance accord with national standards, not only can save coal and mineral resources, improve the heat insulation brick, but also a lot of recycling of utilization of sludge.

Development of Sustainable Alternative Building Materials from Quarry Dust

2018 ◽  
Vol 761 ◽  
pp. 181-188
Author(s):  
Ehud Cohen ◽  
Gabriela Bar Nes ◽  
Alva Peled
Keyword(s):  
Fly Ash ◽  
Building Material ◽  
Building Materials ◽  
Waste Product ◽  
Mining Industry ◽  
Chemical Properties ◽  
High Volume ◽  
Waste Products ◽  
Quarry Dust ◽  
And Chemical Properties

The main goal of our work is to develop an alternative building material based on “zero waste” objective, thus creating commercially valuable products from materials that are otherwise high-volume waste products. Fine dolomitic quarry dust is a waste product manufactured in several millions of cubic tons each year in the mining industry of Israel. Our study examines a sustainable and useful solution to use this quarry dust (QD) as a part of fly ash based geopolymeric systems. Mechanical, thermal and chemical properties were examined and analyzed.

Sign in / Sign up

Export Citation Format

Share Document