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 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.

Influence of the Secondary Raw Materials on the Mechanical Properties of Multilayer Films

2011 ◽  
Vol 488-489 ◽  
pp. 613-616
Author(s):  
Rimantas Didžiokas ◽  
Jolanta Janutėnienė ◽  
Marius Gintalas ◽  
A. Tadzijevas
Keyword(s):  
Raw Materials ◽  
Middle Layer ◽  
Multilayer Films ◽  
Raw Material ◽  
Original Material ◽  
Secondary Raw Materials ◽  
Secondary Raw Material ◽  
High Level ◽  
Reduce Product Cost ◽  
Recycled Material

Recycling and usage of secondary raw materials in production is one of the most topical issues. Usage of secondary raw materials is one of the most topical issues in both economic and ecological (environmental) sense. Such a layered film on the market has lower price because secondary raw material prices is significant lower compared with the original material, the PET granules. Currently producing a layered film the middle layer composes up to 50 % of recycled material. In today's market in order to maintain a high level of competitiveness usage of 50 % of recycled materials is inadequate, therefore to use more recycled material amount and in such way to reduce product cost further researches are necessary.

Production Waste as a Component of Raw Materials for Construction Ceramics

2020 ◽  
Vol 839 ◽  
pp. 184-188
Author(s):  
Victoria A. Gurieva ◽  
Anastasia A. Ilyina
Keyword(s):  
Mechanical Characteristics ◽  
Raw Materials ◽  
Raw Material ◽  
Material Base ◽  
Technological Properties ◽  
Orenburg Region ◽  
Existing Problems ◽  
Ceramic Mixture ◽  
The Russian Federation

The paper considers the existing problems of the production of ceramic products in the territory of the Russian Federation, presents the priority directions of development of this industry. The study includes the determination of the properties of samples based on the raw material base of the Orenburg region, namely, waste generated during the development of brown coal from the Tyulgansk deposit - white and red clays and nickel slag of OJSC Yuzhuralnickel Combine of the Orenburg region. The study presents data from the study of the technological properties of the raw materials, the development of the composition of the ceramic mixture. The influence of the material composition of the clay / slag mixture on the physic mechanical characteristics of the products of the experimental compositions was determined: compressive strength, fire shrinkage, water absorption and density.

scholarly journals Exploiting of Secondary Raw Materials from Fish Processing Industry as a Source of Bioactive Peptide-Rich Protein Hydrolysates

Marine Drugs ◽  
2021 ◽  
Vol 19 (9) ◽  
pp. 480
Author(s):  
Girija Gajanan Phadke ◽  
Nikheel Bhojraj Rathod ◽  
Fatih Ozogul ◽  
Krishnamoorthy Elavarasan ◽  
Muthusamy Karthikeyan ◽  
...  
Keyword(s):  
Bioactive Peptides ◽  
Raw Materials ◽  
Scientific Information ◽  
Amino Acid Sequences ◽  
Raw Material ◽  
Fish Processing ◽  
Secondary Raw Materials ◽  
Fish And Shellfish

Developing peptide-based drugs are very promising to address many of the lifestyle mediated diseases which are prevalent in a major portion of the global population. As an alternative to synthetic peptide-based drugs, derived peptides from natural sources have gained a greater attention in the last two decades. Aquatic organisms including plants, fish and shellfish are known as a rich reservoir of parent protein molecules which can offer novel sequences of amino acids in peptides, having unique bio-functional properties upon hydrolyzing with proteases from different sources. However, rather than exploiting fish and shellfish stocks which are already under pressure due to overexploitation, the processing discards, regarded as secondary raw material, could be a potential choice for peptide based therapeutic development strategies. In this connection, we have attempted to review the scientific reports in this area of research that deal with some of the well-established bioactive properties, such as antihypertensive, anti-oxidative, anti-coagulative, antibacterial and anticarcinogenic properties, with reference to the type of enzymes, substrate used, degree of particular bio-functionality, mechanism, and wherever possible, the active amino acid sequences in peptides. Many of the studies have been conducted on hydrolysate (crude mixture of peptides) enriched with low molecular bioactive peptides. In vitro and in vivo experiments on the potency of bioactive peptides to modulate the human physiological functions beneficially have demonstrated that these peptides can be used in the prevention and treatment of non-communicable lifestyle mediated diseases. The information synthesized under this review could serve as a point of reference to drive further research on and development of functionally active therapeutic natural peptides. Availability of such scientific information is expected to open up new zones of investigation for adding value to underutilized secondary raw materials, which in turn paves the way for sustainability in fish processing. However, there are significant challenges ahead in exploring the fish waste as a source of bioactive peptides, as it demands more studies on mechanisms and structure–function relationship understanding as well as clearance from regulatory and statutory bodies before reaching the end user in the form of supplement or therapeutics.

scholarly journals The Potential for REE and Associated Critical Metals in Karstic Bauxites and Bauxite Residue of Montenegro

Minerals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 975
Author(s):  
Slobodan Radusinović ◽  
Argyrios Papadopoulos
Keyword(s):  
Raw Materials ◽  
Bauxite Residue ◽  
Raw Material ◽  
Late Triassic ◽  
Critical Metals ◽  
Critical Elements ◽  
Secondary Raw Material ◽  
Increasing Demand ◽  
First Time ◽  
Critical Raw Materials

Research for critical raw materials is of special interest, due to their increasing demand, opulence of applications and shortage of supply. Bauxites, or bauxite residue after alumina extraction can be sources of critical raw materials (CRMs) due to their content of rare earth elements and other critical elements. Montenegrin bauxites and bauxite residue (red mud) are investigated for their mineralogy and geochemistry. The study of the CRM’s potential of the Montenegrin bauxite residue after the application of Bayer process, is performed for the first time. Montenegrin bauxites, (Jurassic bauxites from the Vojnik-Maganik and Prekornica ore regions from the Early Jurassic, Middle Jurassic-Oxfordian and Late Triassic paleorelief) are promising for their REE’s content (around 1000 ppm of ΣREE’s). More specifically, they are especially enriched in LREEs compared to HREEs. Regarding other CRMs and other elements, Ti, V, Zr, Nb, Sr and Ga could also be promising. In bauxite residue, the contents of Zr, Sr, V, Sc, La, Ce, Y, Ti and Nb are higher than those in bauxites. However, raw bauxites and bauxite residue as a secondary raw material can be considered as possible sources of CRMs.

Obtaining low-energy cement from industrial raw material

2020 ◽  
pp. 34-40
Author(s):  
N. N. Zhanikulov ◽  
B. T. Taymasov ◽  
I. N. Borisov ◽  
M. S. Dauletiyarov ◽  
M. Zh. Aitureev ◽  
...  
Keyword(s):  
Mechanical Characteristics ◽  
Raw Materials ◽  
Low Energy ◽  
Raw Material ◽  
Pyrite Cinder ◽  
Clay Component ◽  
Free Cao ◽  
Technogenic Raw Materials ◽  
Physical And Mechanical Characteristics

The results of obtaining Portland cement by lowenergy technology using technogenic raw materials are presented. Coal wastes and tephritobasalt in a ratio of 1: 1 were used as the clay component, instead of scarce pyrite cinder, granular lead slags were used. The regularities of the influence of the compositions of the blends, saturation coefficient, silicate and alumina modules, firing modes on the chemical and mineral composition and quality of clinker and cement are established. The composition of the raw mixes was calculated according to the ROCS program, the content of free CaO in the clinker was determined. The strength of experimental cement was tested after 7 and 28 days of hardening. Its physical and mechanical characteristics and structure were studied.

Alternative Preparation of Sulphated Binders from Secondary Raw-Material Resources

2013 ◽  
Vol 838-841 ◽  
pp. 2338-2341
Author(s):  
Marcela Fridrichová ◽  
Karel Dvořák ◽  
Iveta Hájková
Keyword(s):  
Flue Gas ◽  
Industrial Development ◽  
Raw Materials ◽  
Calcium Sulphate ◽  
Raw Material ◽  
Gas Cleaning ◽  
Material Resources ◽  
Power Stations ◽  
Gypsum Formation ◽  
Secondary Raw Material

The insufficient occurrence of raw material resources on our territory was one of the historical reasons for marginal production of sulphated binders from secondary raw-material resources. Also the unprofitability of material production based on calcium sulphate was related to this fact. This was changed in the end of the last century when formation of waste raw materials increased with industrial development. Secondary gypsums became basic raw material for production of plaster boards, plaster mixtures and anhydrite self-levelling mixtures. Wet flue gas cleaning desulphation process during which the energogypsum is formed is nowadays realised in major part of our power stations. Annual production of the energogypsum produced in this way in particular power stations is about 250 kt. The energogypsum is generally stored in stock piles as a so called stabilisate and partially is delivered to cement works as a solidification regulator. Chemogypsum is produced in chemical works where waste waters with content of SO42- occur, which must be desulphated with lime in water ambient. Further it is formed in citric acid productions where also sulphated waters occur. Last but no least it is also produced in industrial production of phosphates. Production of titanium dioxide is another example of the industry where the possibility of gypsum formation exists.

Effect of Salt in Aqueous Solution on the Swelling and Water-Retention Capacity of Bentonite

2011 ◽  
Vol 194-196 ◽  
pp. 2039-2045 ◽  
Author(s):  
Zhi Ming Sun ◽  
Jian Yu ◽  
Shui Lin Zheng ◽  
Chun Hua Bai
Keyword(s):  
Aqueous Solution ◽  
Water Retention ◽  
Chemical Resistance ◽  
Raw Materials ◽  
Saline Water ◽  
Important Application ◽  
Raw Material ◽  
Water Retention Capacity ◽  
Retention Capacity ◽  
Exchange Properties

The swelling and water-retention capacity of bentonite in saline water are the important application properties of bentonite as the raw material of GCLs. In this paper, the swelling volumes and the filter loss of six kinds of Na-bentonite samples hydrated with different concentrations of NaCl, CaCl2, and MgCl2solutions were investigated. In addition, the ion-exchange properties of raw materials, the morphology and structure analysis of the samples soaked in the salt solution were discussed. The results show that the water-retention capacity of bentonite decreases with the increase of salt concentration in aqueous solution; And at the same mass concentration, the water-retention capacity in MgCl2solution decreases most, followed by CaCl2and the least is NaCl. The water-retention capacity of bentonite in saline water is related with ENa+. The larger the ENa+is, the better the chemical resistance of bentonite is.

scholarly journals Volcanic Tuff as Secondary Raw Material in the Production of Clay Bricks

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6872
Author(s):  
Nicoleta Cobîrzan ◽  
Gyorgy Thalmaier ◽  
Anca-Andreea Balog ◽  
Horia Constantinescu ◽  
Andrei Ceclan ◽  
...  
Keyword(s):  
Raw Materials ◽  
Thermal Analyses ◽  
Raw Material ◽  
Firing Process ◽  
Clay Bricks ◽  
Heat Demand ◽  
Result Show ◽  
Clay Matrix ◽  
Secondary Raw Material ◽  
Points Of View

The present work examines an innovative manufacturing technique for fired clay bricks, using tuff as a secondary raw material. Samples were made of clay and tuff (0–30 wt.%) fired at 900 to 1100 °C. The chemical and mineralogical compositions and physical and thermal analyses of raw materials were investigated by using SEM-EDS, RX and DTA-TG curves. The samples were analysed from the mineralogical, technological and mechanical points of view. The result show that the tuff’s presence in the clay mixtures considerably reduced the shrinkage of the product during the firing process, and the manufactured samples were of excellent quality. The compressive strength of the bricks varied from 5–35.3MPa, being influenced by the tuff content, clay matrix properties and firing temperatures. Finally, the heat demand for increasing the temperature from room to the firing temperature of the sample with 10% tuff content was 22%.

scholarly journals Functional food products with components of secondary raw materials of juice production

2018 ◽  
Vol 80 (3) ◽  
pp. 134-139
Author(s):  
N. V. Droficheva ◽  
T. G. Prichko
Keyword(s):  
Food Industry ◽  
Raw Materials ◽  
Food Products ◽  
Biologically Active ◽  
Raw Material ◽  
Additional Food ◽  
Secondary Raw Materials ◽  
Medical Quality ◽  
Functional Product

Currently, the food industry worldwide tries to adhere to the model of agricultural production, using recycled materials to reduce technology costs and expenses. The development of functional products remains relevant not only in European countries, but also in Russia. This article presents data on technology of powder, as a component of functional product, one part of which is a preliminary removal of seeds that contain glucosides, fats, essential oils, leading to its Rancidity. The resulting fine powder, which contains biologically active substances in easily digested form, flavor, aromaforming compounds, as well as sugar (34.0-48.0%), fibre (20.0–35.1%), pectin (3.7–4.8%), vitamins (С 6.4–3.5 mg/100 g, P 28.9–50.6 mg/100 g) and minerals (potassium, calcium, magnesium), able to complement and reinforce the functional significance of the major components, giving the medical quality of the final product. All analyses for the study of chemical indicators of quality of raw material and canned foods, conducted using titrimetric, photometric, spectrophotometric methods on existing Standards. Each of the developed functional products can meet the daily requirement for vitamins and pectin by 15% or more. Introduction in the food industry of technologies aimed at the integrated use of secondary raw materials of juice production, is a reserve for obtaining additional food products and increasing their nutritional value.

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