scholarly journals Study of the properties of chemically resistant repair mortar with the use of secondary raw materials

2021 ◽  
Vol 1209 (1) ◽  
pp. 012037
Author(s):  
P Figala ◽  
R Drochytka ◽  
R Hermann
Keyword(s):  
Sulfuric Acid ◽  
Mechanical Characteristics ◽  
Chemical Resistance ◽  
Raw Materials ◽  
Resistant Material ◽  
Aggressive Environment ◽  
Secondary Raw Materials ◽  
Laboratory Conditions ◽  
Repair Mortar ◽  
Suitable Modification

Abstract This paper deals with the research of a new silicate-based repair mortar modified with selected secondary raw materials. The aim of this work is to develop a chemically resistant material suitable for use in an extremely aggressive environment of sewers. The monitored parameters include key physical-mechanical characteristics, resistance to sulphate ions and to the attack of aggressive biogenic sulfuric acid. Chemical resistance was tested by simulating the exposure environment in laboratory conditions, according to the methodology of DIN 19573. The obtained results show that by suitable modification of the reference mortar it is possible to maintain the values of physical-mechanical characteristics and improve the chemical resistance of test samples.

The New Chemically Resistant Material for the Invert Grouting Optimized by Secondary Raw Material

2021 ◽  
Vol 325 ◽  
pp. 200-208
Author(s):  
Petr Figala ◽  
Rostislav Drochytka ◽  
Vit Černý
Keyword(s):  
Mechanical Characteristics ◽  
Chemical Resistance ◽  
Raw Materials ◽  
Sulfate Solution ◽  
Raw Material ◽  
Material System ◽  
Resistant Material ◽  
Secondary Raw Materials ◽  
Secondary Raw Material

This paper deals with the development of a new mortar, for cement-based inverse grouting, with an increased degree of chemical resistance. The aim of this work is to verify new mixtures optimized by suitable secondary raw materials. The studied parameters include selected physical-mechanical characteristics and chemical resistance of individual raw material variants is characterized by resistance to sulfate solution. The results of this work show that it is possible to increase the chemical resistance by optimizing the grouting mortar mixture with suitable secondary raw materials. The optimized mixture for the new grout will be part of a comprehensive material system for the remediation of sewers or shafts.

scholarly journals The improvement of composite plates’ indicators from cotton and flax spinning waste by modification of raw materials

2018 ◽  
Vol 239 ◽  
pp. 01009
Author(s):  
Alexander Ibragimov ◽  
Tatyana Vakhnina ◽  
Irina Susoeva
Keyword(s):  
Sulfuric Acid ◽  
Composite Plate ◽  
Mechanical Characteristics ◽  
Raw Materials ◽  
Composite Plates ◽  
Plate Material ◽  
Acid Modification ◽  
Composite Heat ◽  
Soft Acid ◽  
Physical And Mechanical Characteristics

The article is devoted to solve the problem of modification of the non-returnable cotton and flax spinning waste in order to improve the physical and mechanical characteristics of composite heat-insulating plates based on these wastes. The modification of the vegetable filler with a 1% solution of sulfuric acid made it possible to increase the physical and mechanical indicators of plates. The thermal insulation properties of the composite plate material with some soft acid modification of the filler did not change significantly.

Antibacterial Properties, Shore Hardness and Chemical Resistance of Epoxy Coatings Containing Finely Ground Secondary Raw Materials for Hygienic Plants

2018 ◽  
Vol 876 ◽  
pp. 97-102 ◽  
Author(s):  
Jakub Hodul ◽  
Jana Hodná ◽  
Rostislav Drochytka
Keyword(s):  
Chemical Resistance ◽  
Negative Impact ◽  
Raw Materials ◽  
Antibacterial Properties ◽  
Silica Sand ◽  
Shore Hardness ◽  
Economic Point ◽  
Antibacterial Coating ◽  
Secondary Raw Materials

Currently fillers for antibacterial layers in hygienic operations are mainly primary raw materials, whose properties are verified and well-known due to their long-term use. However, the use of proper secondary raw materials appears to be a good option from an environmental and economic point of view. This work assesses the possible adverse effects of specially treated secondary raw materials in relation to antibacterial properties, chemical resistance and Shore hardness of the antibacterial coating on an epoxy base (AC-E) providing no physiological damage. This coating reliably eliminates the widest possible range of bacteria and yeasts, has sustained effectiveness, consistent functionality over time, provides permanent protection and is suitable for use in healthcare facilities and food processing plants. Two kinds of transparent waste glass (NaSX, VLG) and two types of waste foundry sand (FSC, FSB) were tested, and all fillers were treated so that particle size was below 0.063 mm, including the reference filler (Dorsilit sand). On the basis of antibacterial resistance tests, Shore hardness and chemical resistance, it was assessed that the tested fillers may be effectively used for antibacterial coatings while maintaining the properties of the reference coating. Within the rapid testing of chemical resistance, the surface microstructure of the antibacterial coating was also examined after long-term exposure to aggressive organic and inorganic liquid media. When adding 30% and 35% of the selected waste fillers, the hardness and chemical resistance of the cured coating did not change. The treated waste fillers tested had no negative impact on the antibacterial properties of the coating and were judged to be appropriate fillers in place of Dorsilit silica sand or glass flakes.

scholarly journals Analysis of residual biomass of liquid biofuels using gravimetric method and combustion heat

2016 ◽  
Vol 61 (Special Issue) ◽  
pp. S21-S25
Author(s):  
J. Chrastina ◽  
L. Staroňová ◽  
I. Vitázek ◽  
M. Pšenka
Keyword(s):  
Methyl Ester ◽  
Solid Fuel ◽  
Raw Materials ◽  
Gravimetric Method ◽  
Fuel Production ◽  
Combustion Heat ◽  
Residual Biomass ◽  
Secondary Raw Materials ◽  
Laboratory Conditions ◽  
Rapeseed Methyl Ester

The using possibilities of secondary raw materials produced during the liquid biofuels production such as bioethanol and biodiesel, and also those produced during solid fuel production was determined. The study presents combustion of distiller’s dried grain with solubles (DDGS) and pressing refuse of rapeseed methyl ester (RME). The combustion was done in gravimetric oven, according to the standards, under the laboratory conditions. Combustion heat of samples was measured with calorimeter IKA C5000. The results show the average combustion heat of 20.91 MJ/kg for DDGS and 18.996 MJ/kg for RME. Results are chronologically presented in tables and figures.

scholarly journals OPTIMIZATION OF MIX-DESIGN OF CHEMICALLY RESISTANT SPRAYED CONCRETE

2019 ◽  
Vol 22 ◽  
pp. 26-30
Author(s):  
Radek Hermann ◽  
Rostislav Drochytka ◽  
Jiří Kolísko ◽  
Pavel Reiterman
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Fly Ash ◽  
Chemical Resistance ◽  
Raw Materials ◽  
Waste Glass ◽  
Mix Design ◽  
Sprayed Concrete ◽  
Secondary Raw Materials ◽  
Soluble Glass

This paper addresses optimization of mix-design and granulometric curves of aggregate of chemically resistant cementitious sprayed mix. The target of the paper is to improve properties of currently developed mix-design, which has no chemical resistance, and to utilize the secondary raw materials. The mix was optimized by additions improving chemical resistance and binder substituted by secondary raw materials. The binder was substituted by finely ground waste glass and high-temperature fly ash. Filler was substituted with slag from deposit yard and waste sand with soluble glass from steel manufacture. Main observed properties for design of optimized mix were workability time, consistence and physical-mechanical properties. Optimized mix-design successfully replaced all fine parts of filler and up to 30% of binder while the physical-mechanical properties were preserved or even enhanced. Optimized mix-designs show the same consistencies and workability times.

scholarly journals Organizational, technical and economic fundamentals of waste management and monitoring

2020 ◽  
Vol 164 ◽  
pp. 08031
Author(s):  
Evgeniy Velichko ◽  
Edward Tshovrebov ◽  
Ural Niyazgulov
Keyword(s):  
Legal Status ◽  
Raw Materials ◽  
Economic Regulation ◽  
Economic Activities ◽  
Renewable Raw Materials ◽  
Secondary Resources ◽  
Secondary Raw Materials ◽  
Production And Consumption ◽  
Level Of Use ◽  
Goals And Objectives

The article deals with issues of monitoring, planning, organizational and technical support, economic regulation and improving the efficiency of the infrastructure for processing, recycling and disposal of waste, resource conservation and management of secondary resources, their use as secondary raw materials for production, services, work and power generation. The Russian Federation has significant potential for economic growth due to the efficient use of secondary resources from billions of tons of generated production and consumption waste annually. These ecologically unsafe anthropogenic objects can be characterized as a source of valuable renewable raw materials, material and fuel and energy resources. However, the scale and level of use of various types of secondary resources are characterized by considerable unevenness and depend on the demand for secondary raw materials, the resource value of the waste, the environmental situation arising from treating them as environmental polluters, on the real economic conditions that determine the profitability of each specific type. economic activities that use secondary resources for the manufacture of products, works, services, energy production. The methods of monitoring the industry for the treatment, disposal and disposal of waste are: information-analytical, information-statistical, sociological, geo-information. The legal status of the monitoring system of the industry for the treatment, disposal and disposal of waste is determined by the limitations of its functionality within the framework of the goals and objectives facing it.

Preparation of Alternative Hydraulic Binder Based on Secondary Raw Materials

2014 ◽  
Vol 1000 ◽  
pp. 12-15
Author(s):  
Jiří Švec ◽  
Tomáš Opravil ◽  
Jiří Másilko
Keyword(s):  
Portland Cement ◽  
Raw Materials ◽  
Construction Materials ◽  
High Volume ◽  
Point Of View ◽  
Hydraulic Lime ◽  
Combustion Gases ◽  
Secondary Raw Materials ◽  
Hydraulic Binder ◽  
Massive Scale

Reusing and recycling of secondary raw materials from high-volume industrial productions (especially form construction materials and binders fabrications) is very important way of conserving environment and it is also interesting from the economical point of view. The production of common hydraulic binders, especially Portland cement, burdens the environment with considerable amount of combustion gases and consumes energy in massive scale. Alternative (low – energy) binder can be used as Portland cement substitution in applications with lower mechanical properties requirements. Mined limestone wash sediments contain large amount of clay components, but there is also indispensable share of fine calcite. This composition makes these sediments a promising material for the preparation of hydraulic binders as Roman cement or hydraulic lime.

STATE AND PROSPECTS OF PROCESSING OF SECONDARY RAW MATERIALS OF WINE-MAKING IN UKRAINE

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
L. Osipova ◽  
O. Radionova ◽  
L. Tkachenko ◽  
T. Abramova
Keyword(s):  
Agricultural Land ◽  
Animal Feed ◽  
Raw Materials ◽  
Acid Soil ◽  
Biologically Active ◽  
Limiting Factor ◽  
Wine Making ◽  
Secondary Raw Materials ◽  
Use Of Resources ◽  
Wide Range

The analysis of the current state of processing of secondary raw materials of wine-making in Ukraine is given. It is proved that the latter is a rich source of biologically active compounds, including phenolic ones, which makes it possible to use it for the production of a wide range of products (raccoon, polyphenol extracts, tartaric acid, beverages, fertilizers, grape oil, cake, vitamin D, animal feed, food powder, abrasives) with high consumer value for various industries: food, pharmaceutical, perfume and cosmetics, chemical, feed, etc. In the light of modern research, the role of phenolic compounds as essential nutrition factors that cannot remain out of the field of view of physiologists, pharmacologists, and food hygiene specialists is shown. However, currently in Ukraine there are no specialized enterprises for complex processing of secondary raw materials of winemaking; traditional technologies are not effective from a technological, economic and environmental point of view, which indicates not rational use of resources and loss of material resources; there are no systematic studies on physical and chemical, microbiological, Toxicological composition in order to determine the optimal direction of its use. A limiting factor is also the lack of comparative analysis of innovative domestic and foreign technologies for processing secondary raw materials of winemaking. In the vast majority of cases, in particular, combs and pomace are taken out of control to agricultural land without special treatment, which leads to acid soil erosion and pollution of the environment with metabolites of micromycetes, increasing one of the global problems of mankind-environmental. At the present stage of technological development, there are a number of innovative developments in the field of processing secondary raw materials, in particular grape pomace, in order to obtain biologically active additives, the limiting factor for the introduction of which is the lack of domestic and expensive imported equipment. A promising way to solve the existing problems is to create a mechanism that will unite the interests of wineries (producers of secondary raw materials of winemaking), processing enterprises (producers of products from secondary raw materials of winemaking), scientists and potential consumers of innovative products. Consolidation of the above-mentioned institutions and enterprises is possible by creating clusters for the development and implementation of innovative technologies and equipment

BIOPLASTIC MADE OF ORANGE PEELS

10.6036/10212 ◽  
2021 ◽  
Vol DYNA-ACELERADO (0) ◽  
pp. [ 7 pp]-[ 7 pp]
Author(s):  
Julieta Domínguez Soberanes ◽  
PIA BERGER
Keyword(s):  
Organic Waste ◽  
Raw Materials ◽  
Orange Peel ◽  
Main Ingredient ◽  
Resistant Material ◽  
Orange Peels ◽  
Toxic Product ◽  
Orange Peel Waste ◽  
Materials Used ◽  
Environmentally Friendly Process

This study uses orange peel waste to create a biopolymer that can be used for different purposes. In order to achieve this, we evaluated various technologies for the production of the biopolymer, and tried to design the most environmentally friendly process possible. One of the reasons why this bioplastic should be manufactured is to participate in the replacement of common environmental hazardous plastic, which has been banned in many places. On the other hand, using orange peel as the main ingredient is an alternative and gives value to an organic waste that has limited use in circular economy solutions. In this research we present a methodology to create a bioplastic of orange peels. As a result, we obtained a biodegradable, flexible and resistant material to be used in the manufacture of containers, utensils, etc. In addition, it is a material that, given the raw materials used, is considered GRAS (Generally Recognized As Save), implying a non-toxic product that is safe for the consumer.

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