scholarly journals Revisión bibliométrica del panorama investigativo en concretos verdes

Author(s):  
Valentina Escobar Dávila ◽  
Carlos Andrés Aristizábal Torres ◽  
Alejandro Alzate Buitrago

The manufacture and use of concrete are significant environmental pollutants due to its high CO2 emissions. Contrary to the current postulates of sustainable development and global pacts for the reduction of greenhouse gases, which is why during the last 20 Years have been developing new techniques and use of alternative materials, as raw material for the manufacture of concrete, with satisfactory results in terms of durability and resistance. The search was advanced in the Scopus database, using the search equation “green concretes”, filtering by title. Using bibliometric and network visualization tools, such as RStudio and VOSviewer, the information corresponding to 201 documents was processed and evaluated. The most significant findings indicate that China and India are leading the research on new technologies to use recyclable raw materials in the manufacture of green concrete, causing the global environmental impact in the construction sector to decrease. Additionally, it was found...

Author(s):  
М.В. СЕМЧЕНКО ◽  
Л.С. ЖУНЕВА ◽  
И.С. МИЛЕНТЬЕВА

Рассмотрены инновационные технологии продуктов на основе меда. Установлено, что мед как сырье достаточно востребован в пищевой промышленности, а разработка новых технологий с использованием этого ценного продукта требует увеличения объема его производства. Проанализированы динамика производства меда в Российской Федерации в 2007–2017 гг., объемы экспорта и импорта меда в нашей стране за период 2014–2018 гг., а также указаны основные проблемы пчеловодства как одной из важнейшей отрасли сельского хозяйства, поставляющей ценное сырье для пищевой промышленности. Innovative technologies of products on base of honey were considered. It is established that honey as a raw material is in demand in the food industry, and the development of new technologies with using this valuable product requires an increase of it production. Dynamics of honey production in the Russian Federation in 2007–2017, volumes of export and import of honey in our country for the period 2014–2018 are analyzed, and also the main problems of beekeeping as one of the most important branch of agriculture supplying valuable raw materials for the food industry are specified.


2019 ◽  
Vol 13 (3) ◽  
pp. 433
Author(s):  
Fahrur Rozi ◽  
Quartina Pudjiastuti

Potential and opportunities for cassava development are still very broad along with development of companies in livestock, processed food, and other industries. Added value of cassava commodities resulting from development of downstream industries (processed products) is far higher than upstream industries (primary products), so that development paradigm in agriculture sector in future should be directed towards product expansion including its waste. This study aims to examine the economic value of cassava as a future crop from direct as well as by-products and their development strategies. Data was collected from small-scale tapioca flour farmers, ranchers and entrepreneurs. SWOT analysis was used to determine relevant development strategies. Analysis shows that cassava has an potential, especially as a raw material for food and feed industry. In short term, developing cassava strategy as an industrial raw material is to use new technologies i.e. varieties and cultivation techniques for planting arrangements. Cassava potential economic value is relatively high in terms of farming aspects, food raw materials, feed and industry. This potential, apart from main product, is also by-product that has been neglected at 29.7% of cassava main value. By-products potensial has not been used optimally and a bioeconomic value of biomass that can support integrated agriculture in the future.


Author(s):  
О.Я. МЕЗЕНОВА ◽  
А. ХЕЛИНГ ◽  
Т. МЕРЗЕЛЬ

Показано, что вторичное рыбное сырье (ВРС) является источником полноценных пептидов, жиров, богатых полиненасыщенными жирными кислотами, ценных минеральных веществ – кальция, фосфора, магния, серы, калия, натрия. Использование биопотенциала данного сырья рационально путем его молекулярного разделения на фракции – белковую, липидную и минерально-белковую. Рассмотрена инновационная технология переработки ВРС – его гидротермальная обработка под давлением с предварительным ферментированием или без него. Представлены аминокислотные составы белков продуктов, полученных из чешуи сардины и голов нерки. Показаны преимущества переработка ВРС по новой технологии. Дан обзор разработанных на основе новой технологии биопродуктов для школьников и студентов, спортивного и геродиетического питания. It is shown that secondary fish raw materials (SFRM) is a source of complete peptides, fats, rich in polyunsaturated fatty acids, valuable minerals – calcium, phosphorus, magnesium, sulfur, potassium, sodium. The using the action potential of the raw material is rationally by molecular separation into fractions of protein, lipid and mineral-protein. Innovative processing technology VRS – its hydrothermal treatment under pressure with a pre-fermentation or without it was considered. The amino acid compositions of protein products derived from the scales of sardines and heads of salmon were presented. The benefits SFRM of processing for new technology are shown. Overview developed on the basis of new technologies of bio-products for pupils and students, sports and elderly persons nutrition is given.


Minerals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 940
Author(s):  
Daniel Saramak

This paper concerns problems related to the mechanical processing of mineral raw materials. The aspects explored were limited to the analysis of comminution technologies in terms of their effectiveness and energy consumption, modeling and simulation approaches, the assessment of crushing results, and environmental aspects. This article includes investigation of new technologies of comminution, comparing HPGR, high-voltage pulses, and electromagnetic mills. In the area of modeling and optimization, special attention was paid to the approximation of the particle size distribution of crushing products by means of Weibull, log-normal, and logistic functions. Crushing products with an increased content of fines were well characterized by Weibull’s distribution, while log-normal function adequately described HPGR products with a relatively low content of fines.


2021 ◽  
Vol 21 (4) ◽  
pp. 174-191
Author(s):  
Anastasiya Sevastyanova ◽  
Victor Yatsenko

Numerous studies demonstrate that the goals of economic growth frequently take precedence over addressing social problems and problems of environmental degradation. The manifestations of this imbalance differ from country to country depending on the stage of development of the productive forces, and institutional framework that ensures the creation and adoption of new practices and approaches to exploitation of natural resources. This problem is entirely inherent into the economies of resource regions. The paper aims to examine the impact of the extraction of raw materials demanded by the national economy on the problems and prospects of the long-term sustainable development of northern Russian localities. Methodologically, the research rests on the theory of inclusive development and evolutionary economic geography. The comparative analysis of the formation of local budgets and dynamics of the Okrug in Russia reveals that the degree of their financial sufficiency depends insignificantly on the scales and dynamics of raw material production. The legislation on assigning revenues to local budgets takes into account the specifics of the northern oiland gas-producing territories rather poorly. The financial capabilities of local communities do not allow handling existing ecological problems. The growth in hydrocarbon production in current institutional conditions does not guarantee sustainable long-term development for such territories. Addressing environmental issues requires instituting serious changes at federal and regional levels, including making the alterations to the articles of the Tax Code of the Russian Federation. It is also crucially important to give financial incentives to introduce new technologies, provide research grants, lower labour taxes, and raise taxes on the use of natural resources.


2020 ◽  
Vol 13 (1) ◽  
pp. 148-159
Author(s):  
N.L. Orlova ◽  

The author considers the factors and difficulties of involving raw materials in international trade at the present stage. The necessity of developing new approaches to assessing the possibilities and effects of including resources in the global turnover against the backdrop of globalization challenges is shown. It is noted that the transformation of the model of world economic development reinforces attention to the resource supply factor of the modern world economy and helps to increase its role in the field of interaction of economic and political power vectors. It is determined that the technology of resource management in the global economy provides for the optimization of the processes of forming the resource base and improving the management of resource flows. It has been revealed that the problem of finding new approaches to improving the management of resource 159 МИРОВАЯ ЭКОНОМИКА И МЕЖДУНАРОДНЫЙ ОПЫТ flows, especially raw materials, in the modern world economy is becoming particularly relevant against the background of the emergence of new technologies in resource extraction, the introduction of innovations in organizing the delivery of resources to their places of consumption and reducing the efficiency of existing business models. Some aspects of the application of soft calculations and measurements in the management of raw resource flows are presented. The characteristic is given to the system of socio-economic ratings of countries. The ratings that evaluate the raw material resource flows are considered. Combined ratings are proposed for use in the management of raw material resource flows. It is noted that the competitive advantages of the economies of countries, integration associations, individual areas of production in modern conditions largely depend on their involvement in the processes of international specialization. It is posed the problem of effective countries supplying raw materials for participation in value chains. Particular attention is paid to identifying opportunities for improving the activities of Russian companies in world commodity markets.


2020 ◽  
Vol 1 (1) ◽  
pp. 34-49 ◽  
Author(s):  
Maria Laura Böhm

Extractive industries often cause serious environmental harm, and even social harm, to the local populations of the commodity regions, especially in the Global South. The increasing demand and extraction of raw materials needed for the production of new technologies in the Global North is a specific case of this, which emphasizes asymmetrical global economic conditions. This article describes these harmful commodity relationships and presents the meaning behind the increase in the demand for and production of raw materials. The case of lithium is offered as an example of this development. Further, in the article, it is suggested that the lack of regulation and control promotes a series of deviant and criminal practices which can be systematically organized for criminological analysis. The harm caused by this industry, by its part, is presented as well, as well as a first categorization of its impact on the local population even in terms of human rights violations. Instead of a conclusion, an invitation to the study of these renewed forms of exploitation and victimization is made to criminologists, and especially, to criminologists from the particular regions that benefit from the development of new, innovative “clean” technologies.


2012 ◽  
Vol 727-728 ◽  
pp. 1422-1427
Author(s):  
Suélen Silva Figueiredo ◽  
Cibelle Guimarães Silva ◽  
Izabelle Marie Trindade Bezerra ◽  
Suellen Lisboa Dias ◽  
Gelmires Araújo Neves ◽  
...  

The construction industry in addition to being considered one of the biggest natural resources consumers is still responsible for generating large quantities of residues. The impacts caused by these residues have motivated research aimed at developing new techniques for reuse and recycling this material by using as raw material to make alternative materials. The introduction of demolition residues (DR) in soil-lime bricks replacing part of the pozzolan becomes possible due to the cementing properties that these residues may present when finely grounded. This study aims to evaluate the durability of soil-lime blocks embedded with demolition residues. For this study the raw materials were characterized by particle size distribution analysis, X-ray diffraction and chemical analysis. Then test specimens were prepared using mixes in a 1:10 ratio of lime:soil and embedded with residue in partial replacement of lime, in the proportions of 25%, 50% and 75% with curing period of 90 days. Later, the test specimens were evaluated for durability. The results showed that soil-lime bricks embedded with contents above 50% of residues had their durability affected.


Jurnal CIVILA ◽  
2017 ◽  
Vol 2 (2) ◽  
pp. 9
Author(s):  
Adytia Eko Sutrisno ◽  
Dwi Kartikasari

Cement is one of the main ingredients in the manufacture of concrete. The raw material is used in the manufacture of cement are limestone, silica sand, clay and iron sand. Cement is a material made of material that belong to natural resources that cannot be renewed, so that the raw material inventory of cement in nature is getting less. Continuous mining of cement raw materials has an impact on natural damage. It encourages the discovery of alternative materials as an additive to the manufacture of concrete. The method of data analysis begins with the investigation of cement material, coarse aggregate, fine aggregats and rice straw ash. Concrete is added with rice straw ash with variations of 0%, 5%, 10%, and 15% additions. The test specimen are cylinders with size ø 15 cm x 30 cm and the planned compressive strength is 14.5 MPa. After going through the treatment period for 7 days, the value of compressive strength is then correlated to the age of 28 days. Based on research that has been done at Civil Engineering Laboratory of Islamic University of Lamongan, it is found that there is a decrease of strength on each addition of ash straw content of paddy. Use of rice straw ash in concrete mix with variation of 0%, 5%, 10%, and 15% addition of The weight of cement has an impact on the decrease of concrete strength value. The compressive strength values obtained at the age of 28 days are 18,440 Mpa, 15,366 Mpa, 13,948 Mpa, and 12,530 Mpa.


Characteristic changes in the constitution of hard coals (such as the nature and abundance of functional groups, the degree of order and the development of capillary structure) that occur in coalification and carbonization processes have a profound bearing on the rational utilization of coal in the coke and carbon industries. For blastfurnace coke manufacture the selection of blend components and their influence on the development of coke structure are very important. Modification of coke structure by additions of bituminous substances of coal and petroleum origin to blends opens up the possibility of preparing synthetic coking coal. In formed coke production, the nature of coal and binder and their distribution within the mixture are significant. The use of hard coals and their extracts and pitch as raw materials for improved carbon manufacture are discussed in terms of graphitizability. The adsorptive and mechanical properties of active carbons are dependent upon coal constitution and rank. It is concluded that the rapidly developing new technologies of coal utilization require a more elaborate classification system that would include the more important structural parameters of coal constitution.


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