Sulfur Binder Research Articles

TECHNOLOGY FOR THE PRODUCTION OF COMPOSITE MATERIAL-SULFUR CONCRETE PRODUCTS FROM MODIFIED SULFUR

Due to the increase in the processing of sulfur-containing hydrocarbon raw materials (oil and gas), sulfur is released as one of the large - tonnage waste. Long-term storage of large sulfur reserves has a negative impact on the environment. Composite material of sulfur modification-characterized by environmental efficiency, economic efficiency in construction. This review examines the sources of sulfur origin, properties, technology for making sulfur concrete from it and the use of sulfur-based concrete in the construction industry today. Experimental evaluation of modified sulfur concrete, other methods of preparation of mixtures were identified, and the importance of adaptation to foreign experience in the development of sulfur concrete production was shown. One of the most promising projects is the production of concrete containing sulfur binder in order to reduce the load on the environment. After all, sulfur concrete has such advantages as resistance to acid and radiation, frost resistance and the ability to recycle. The aim of the work was to study a new composition of sulfur concrete based on a bitumen composition. To conduct the study, samples of sulfur concrete with different percentage contents of the constituent components were prepared.

Reversible Li-ion trade-off in ultrathick sulfur cathodes for practical lean Li–S batteries

The use of low electrolyte volume is beneficial to improve energy density but severely limits access over obscured sulfur, along with sluggish ion kinetics and aggravated polarization, as the ion imbalance across the multicomponent interface of thick sulfur cathodes at a lean electrolyte viciously dominates the sulfur electrokinetics. Herein, we demonstrate that an ion imbalance at the interfaces of a thick electrode with a lean electrolyte can be compensated by the ion trade-off strategy utilizing a cationic ion conductive active binder. It ensures sustained lithium-ion donation/release over the vicinity of slow electrolyte percolation to realize an ion-enriched sulfur–binder–electrolyte interface. The in-situ evolved ionic interface essentially activates the inaccessible sulfur, bringing about additional capacity and low ion and charge transfer resistances. The active binder adopts sulfur cathodes housing 8.1 mg cm–2 with an E/S ratio of 6 µL mg–1 electrochemically utilized 60.89 % sulfur, corresponding to a 1020 mAh g–1 capacity. The lean Li–S pouch cell delivers an energy density of 324 Wh kg–1, demonstrating the efficacy of ion trade-off to ease the interfacial barrier. This study would open up a new paradigm in potentially designing thick electrodes for multiple high energy density batteries.

Expanding the Fields of Use of Concretes Based on Sulfur Binder by Increasing Thermal Characteristics of Them

Expanding the Fields of Use of Concretes Based on Sulfur Binder by Increasing Thermal Characteristics of Them

Study of the possibility of using sulfur asphalt and sulfur concrete in road construction

Abstract The introduction of new effective road construction materials for pavements and foundations of highways is an urgent task, including the development and application of resource-saving technologies aimed at the use of low-demand, large-tonnage mineral materials, semi-finished products, industrial waste, and their by-products. Research on this topic has shown that sulfur and sulfur-containing waste, as well as modified technical sulfur when used as a binder, should be widely used in sulfur structural and road concrete in liquid, granular, or lumpy form. Ferrous cakes from the Pobug Nickel Plant or “tailings” of sulfur ore flotation can be used as fillers for sulfur binder. Having a high specific surface, they will have a positive effect on the structure formation of sulfur during the crystallization of the melt in the direction of strengthening the structure. Their high acid resistance should significantly increase the corrosion resistance of sulfur concretes. Granular slag from a metallurgical plant can be used as a fine aggregate. Overburden rocks in the form of gabbro-dolerites, dolerites, and basalts can be used as acid-resistant large aggregates. To reduce the fragility of the sulfur binder, plasticizing additives such as naphthalene, chlorinated paraffin, and bitumen can be introduced. The results obtained in this study confirm a decrease in the cost in the production of asphalt and cement concrete and the possibility of expanding the range of building materials with new road-building mixtures. Also, the test results showed that when temperature was decreased, the strength characteristics of sulfur concrete in the temperature range 0°C to −60°C increased by 7%. Low water absorption of sulfur concrete (0.1%–0.3%) versus cement concrete (2%–4%), which positively affected the strength and operational characteristics, was revealed.

Martian and lunar sulfur concrete mechanical and chemical properties considering regolith ingredients and sublimation

• Sulfur sublimation rate at vacuum is 8000 times lower at −60 °C than at 20 °C. • Sulfur concrete permeability decreases strongly with higher sulfur content. • Sulfur concrete porosity does not change much with varying sulfur content. • The presence of alumina in sulphur concrete results in higher porosity. • Alumina and iron oxide together in sulphur concrete leads to lower porosity. Space constructions require unique materials suitable for the harsh conditions in space. Sulfur concrete (SC) is one of the most promising materials for such applications. However, the behavior of sulfur concrete in a vacuum, microgravity, and different temperature conditions and its chemical changes has not been well established yet. This study investigated the effect of vacuum, sulfur content, and compaction (trowel effect) on mechanical and hydro-mechanical properties. Moreover, this study assesses the impact of chemical reactions of aluminum and iron oxides with molten sulfur on the sulfur concrete’s mechanical properties via X-ray diffraction analysis (XRD), scanning electron microscopy (SEM-EDS), and Fourier-transform infrared spectroscopy (FTIR). The predictions from this research show that the sublimation rate under vacuum conditions at very low temperature (−60 °C) can be reduced nearly 8000 times compared with that at 20 °C according to the vapor pressure-sublimation rate relationship. In addition, mechanical experimental tests show that a slight increase in sulfur content dramatically reduces the permeability of sulfur concrete. On the other hand, the porosity is not much affected by the sulfur content. Moreover, sample compaction leads to a significant reduction and increment of the hydro-mechanical and mechanical strength, respectively, indicating the trowel's positive effect. Chemically, sulfur dioxide reacts with alumina and iron oxide via chemical adsorption, and then reaction with molecular oxygen produces S O 4 2 - confirmed by SEM-EDS, XRD, and FTIR results. The presence of alumina increases the sample porosity, although, together with iron oxide, another mineral, namely A l 2 F e 2 S O 4 6 ( H 2 O ) 12 . 6 H 2 O (Aluminocoquimbite), is formed resulting in a lower porosity. To conclude, we have shed light on sulfur concrete properties and preparation processes in unconventional environments and we have shown how different unknown parameters affect the mechanical and chemical properties of the sulfur binder.

Oil products for the production of sulfur concrete

At present time, with the development of the industrial complex of the Republic of Belarus, the volume and depth of oil refining at refineries are increasing. In this regard, the amount of by-products produced, in particular sulfur, is increasing. One of the possible ways to expand markets for the use of sulfur is to use it in non-standard industries, in particular in construction, for the production of building materials based on sulfur binder. In this article, authors analyze the world experience in the production of sulfur concrete, as well as the results of experimental studies of the properties of sulfur concrete obtained by the authors on the basis of local raw materials.

Influence of process conditions on the composite construction material properties based on sulfur binder

The construction industry is the most large-capacity industry, where the issue of quality and availability of basic road construction materials is particularly acute. Established resources of high-quality mineral raw materials that could be used for the construction materials production are practically absent in the Yakutia territory and are located extremely unevenly, which significantly reduces the work quality performed, and when delivering conditioned materials to the construction site, leads to a significant increase in cost. In this regard, the issue of using local raw materials, including off-quality ones, as well as industrial waste for the construction composite materials development, including concrete, with high physical, mechanical and operational properties complex is currently acute. Thus, recently there has been an increased interest in sulfur-containing materials, in which sulfur plays a fundamental component role and provides a high technical effect — hydrophobicity, sufficiently high strength, frost resistance, and durability necessary for composite road construction materials operating in Yakutia. This article presents the research results on the development of technology and new sulfur concrete compositions from fine river sands and crushed limestone screenings using technical and modified sulfur as a binder. The possibility of using local raw materials and sulfur binder for sulfur concrete production, which differs from traditional concrete on Portland cement, by a high physical and mechanical properties complex, has been established.

High Strength Construction Material Based on Sulfur Binder Obtained by Physical Modification

In this work, a method for obtaining a high-strength composite material on a sulfur binder without the use of chemical modifiers was proposed. It consists in obtaining a thixotropic casting mixture in the vicinity of the yield point of the system during vibration laying. The compressive strength of the obtained composite was about 97.5–94.0 MPa. Physical and mechanical characteristics remained stable for 7 years. The samples were obtained for a model composition of sulfur/marshalite (finely ground 98% silicon dioxide). The microstructure of the synthesized material was studied by electron microscopy, the results of which showed that shrinkage cavities are characteristic of a material with a low density, and no shrinkage cavities were found for a high-strength material. The phase composition was determined by the methods of XRD analysis, according to the results of which it can be argued that sulfur is in the orthorhombic form (S8). This technique can be proposed for obtaining the high-strength stable building material.

Sulfur concrete made with waste marble and slag powders: 100% recycled and waterless concrete.

In this research, the mechanical properties and durability of sulfur concrete with two different waste aggregates were evaluated. The waste aggregates included ground granulated blast-furnace slag and waste marble powder. The properties of sulfur concrete were also compared with those of the conventional binder concretes (i.e., Portland cement concrete and sulfate-resistant cement concrete). The durability parameters included measuring water absorption capacity and resistance to different harsh chemical environments (5% HCl solution, 5 Molar NaOH solution, and 16% NaCl solution). It was found that sulfur concrete made with slag as aggregate exhibited the maximum strength, i.e., about 2 times higher than that of Portland cement concrete and sulfate-resistant cement concrete. Sulfur concrete made with slag and marble waste powder showed superior mechanical performance compared to that made with river sand. Thus, sulfur binder develops more favorable properties with eco-friendly fillers than it develops with natural sand. In harsh chloride and acidic environment, sulfur concrete with slag powder exhibited about 90-95% lesser mass loss than Portland cement concrete.

The Use of Sulfur Waste to Protect Against Corrosion of Metal Implants

Metal parts of endoprosthesis have a detrimental effect on the bones that come into contact with them and on the entire body of the patient. Coating them with biocompatible layers (hydroxyapatite and bioglass) has not yet brought about permanent results. In this study, the author showed the possibility of using a binder containing sulfur waste for this purpose. The sulfur binder is used industrially in electrical engineering and construction applications. The chemical properties of elemental sulfur indicate that it is a biocompatible material. Previous studies on rats have shown that sulfur binder is a biocompatible material. A steel surgical nail covered with sulfur waste, placed in a sheep's femur, showed excellent stabilization by adhering bone tissue to the composite layer. From the results, it is convinced that the composite made of sulfur waste creates new possibilities in the field of production of biocomposites for surgical applications. The prepared biocomposite composition was sulfur waste-69.5%, mineral quartz dust-30%, and technical soot-0.5%. There is no information on similar studies in the world literature. So far, sulfur waste has been used in the electrical and construction industries. The literature shows that no researcher has used sulfur waste in biocomposites. So, the current study is a pioneering experimental study in this area.

Technology and Properties of Composite Materials with Modifier of Chloride Aluminum

The paper discusses the important issues concerning recycling of industrial sulfur waste and bottom ash. The process flow diagram was designed to form protective coatings on cement concrete by impregnation with molten sulfur, which featured high strength, performance properties and corrosion resistance. The process parameters were specified. The addition of bottom ash slag to cement concrete not only offers a means for recovering waste from thermal power stations, but also increases the material strength. Besides, the impregnation process provides low thermal conductivity for concrete while giving the material high heat insulation. A higher strength of the samples containing bottom ash slag results from a high dispersity and reactive surface of bottom ash slag. The paper investigates the influence of the electrophilic agent (aluminum chloride) on the properties of sulfur binder. It was shown that addition of aluminum chloride encouraged the formation of a more effective protective coating that gave the samples of cement concrete higher strength, density, water resistance. The electrophilic agent stimulated the synthesis process for inorganic sulfides and composite materials based on them. It was found that addition of the electrophilic agent (aluminum chloride) reduced the viscosity of molten sulfur significantly, which was attributed to the formed short-chain sulfur radicals. Such a melt has a relatively high penetration capability to ensure the formation of a high-quality protective coating.

Activation of Sulfur and Opal-Cristobalite-Tridymite Phase in Sulfur Concrete Technology

The paper investigates the influence of the metal chlorides (Al, Zn, Ti, Fe) on the properties of sulfur binder. The addition of Lewis acids stimulated the synthesis process for inorganic sulfides and sulfur concrete based on them. The resulting sulfur concrete has high performance characteristics. It was found that aluminum, titanium and iron chlorides acted as activators for sulfur ring opening, reduced the activation energy in the process and simultaneously encouraged the chemical interaction between sulfur and surface silicon of silica-containing compounds. It was revealed that the reactivity of sulfur modifiers decreased in a series of Zn>Al>Ti>Fe. Chemical modification of the silicate surface with chlorides of Zn, Al, Ti, Fe results in intended change of its chemical properties. The paper shows that modification increases a number of active reaction sites on the silicate surface. The designed technology is environmentally sound and economically feasible: it ensures the efficient use of sulfur waste from the oil and gas industry, and provides durable and corrosion resistant composite materials that have lower production cost than the known analogues. The designed materials can be used in road construction for roadbeds, paving slabs, curbstones, pavestones, gutters.

Modification of Technological Properties of Laboratory Premixes

Sulfur binders belong to the group of airbrushes. They can therefore only harden and harden in the air. The main raw material, gypsum, can be mined in several places in the world. Even in the Czech Republic there is a deposit of natural gypsum in Kobeřice u Opavy. [5] In spite of this fact, we use mostly industrially produced gypsies, because the natural gypsum deposit has only very limited capacity. The Energogypsum, produced in the Czech Republic by ČEZ Energetické Produkty s.r.o., is the waste product of flue gas desulphurization using the wet limestone scrubbing method. Like the chemosynthesis, it is characterized by its high purity (the content of pure CaSO4 2 H2O is at least 90%). The one in the Czech Republic is manufactured by Precheza, a.s. in Přerov. The use of sulphate binders is varied. A better form in the form of alpha plaster is used to produce self-leveling floors and dentistry. Less-quality beta gypsum has a larger application. From it we can produce both gypsum and monolithic partitions. We can also use it for the production of plasterboard and gypsum fiber boards and, last but not least, as internal plasters for its good fire performance. [1] Plasters are being prepared today in two different ways. Firstly, they are still prepared in the original outpatient way directly on the building from individual raw materials, but they are also industrially produced in the form of dry mortar mixtures, which are mixed on the building only with water. The second way is more progressive with the fact that nowadays it is even more widespread. For many builders, however, it remains financially scarce. That is why we have recently begun to find a compromise solution that will satisfy both the technical and the economic ones. This is the development of the so-called binder premixes, ie the industrially produced mixed binder, which is mixed only with sand and water on the site. The situation on our market shows that the recently developed special premix for lime-cement plaster and mortar mixtures is very positive for the building public and therefore the effort is to generalize this mixed mortar in the production raw material base and, in addition, to develop its analogue based on sulphate binder. [2]

Concrete based on sulfur binder being modified with inorganic additives

The sharply continental climate of the Irkutsk region is characterized by wide temperature intervals throughout the year. The repeated cyclicity of freezing and thawing of building materials in the water-saturated state influences the change in technical characteristics and the durability of concrete products and structures. The concrete products’ features in such climatic conditions create the need for the production of concretes with improved indicators of physical and mechanical properties. The effect of modifying additives on the technological characteristics of sulfur concrete is established. The effect of all elements of sulfur concrete on its strength and frost resistance. The composition of sulfuric concrete is obtained, which meets all the requirements and also has high strength and increased frost resistance. Formulations with a certain ratio of structural sulfuric concrete mixtures were developed. As a result of the use of technical sulfur in the composition of concrete products, the problem of utilizing annually accumulating reserves of technical sulfur is partially solved. The strength properties of sulfuric concretes easily compete with high-quality brands of concrete, special types of concretes that have in their composition additives.

Assessment of sulfur concrete properties for use in civil engineering

Sulfur concrete is a material that was introduced to the civil engineering industry as a substitute of a typical concrete in which cement is a binder. Sulfur concrete properties are provided by a sulfur polymer produced in the process of synthesis of the ordinary sulfur with modifiers that prevent a process of crystallization of sulfur what results in stabilizing sulfur polymer structure. The purpose of this investigation was to evaluate characteristics of sulfur concrete, which was designed with combustion products. It was established that mechanical parameters of sulfur concrete should correspond with properties of a cement concrete used in production processes of prefabricated elements of road and construction industry. Accurateness of parameters of a designed mixture was confirmed and rated by a series of tests of hardened concrete – physical, mechanical (compression strength), durability in harsh environment. The test results confirmed low water absorption, high resistance to wear abrasion, high freeze-thaw scaling resistance (surface weathering) in a salty environment and high compressive and tensile strength of individual compositions. However, due to the internal structural damage, the freeze-thaw-attack cube tests did not prove the freeze-thaw resistance of the sulfur concrete specimens. The reason was low freeze-thaw-attack resistance of sulfur binders.

Mitigation of in vitro hydrogen sulfide production using bismuth subsalicylate with and without monensin in beef feedlot diets.

The objective of this study was to determine if a sulfur binder, bismuth subsalicylate (BSS), alone or combined with monensin (MON) could decrease the production of HS by rumen microbes. In Exp. 1, two 24-h batch culture incubations were conducted using a substrate consisting of 50% corn, 40% distillers grains, 9.75% hay, and 0.25% mineral premix, on a DM basis. Five treatments including BSS concentrations of 0% (control), 0.5%, 1%, 2%, and 4% of DM were assigned in 5 replicates to 120-mL serum bottles containing rumen fluid, buffer, and 0.5 g of dietary substrate. Addition of 2% and 4% BSS decreased ( < 0.05) gas production, whereas all concentrations of BSS reduced ( < 0.05) HS production by 18%, 24%, 82%, and 99% for 0.5%, 1%, 2%, and 4% BSS, respectively. Final pH increased ( < 0.05) with 2% and 4% BSS treatments. At 4% of DM, BSS decreased ( < 0.05) total VFA concentration (m) and propionate (mol/100 mol) but increased acetate (mol/100 mol) and acetate to propionate ratio. Concentration of branched-chain VFA increased ( < 0.05) with the addition of 0.5% BSS, compared with the control. On the basis of these results, addition of BSS (1% of DM) and MON (5 mg/kg) were used to assess their effects on metabolism and HS release by rumen microbes in 8 dual flow continuous culture fermenters during two 10-d periods (Exp. 2). Treatments were arranged in a 2 × 2 factorial design. Substrate similar to that used in Exp. 1 was provided at 75 g DM/fermenter daily. Headspace HS concentration was reduced ( < 0.05) by 99% with BSS treatment but was not affected ( = 0.21) by MON. An overall increase ( < 0.05) in fermentation pH was found following addition of BSS. Addition of BSS increased ( < 0.05) digestion of NDF and ADF but decreased ( < 0.05) nonfiber carbohydrate digestion and total VFA concentration. Acetate and propionate (mol/100 mol) increased ( < 0.05) with BSS, whereas butyrate (mol/100 mol) and branched-chain VFA (m) decreased ( < 0.05). Addition of BSS increased ( < 0.05) NH-N concentration and NH-N outflow but decreased ( < 0.05) microbial N outflow. Results from this study showed no response to monensin addition, but BSS markedly reduced HS production and altered microbial fermentation during in vitro rumen fluid incubations.

Anhydrite: An important sulfur binder limiting the climatic impact of subaerial volcanic eruptions

Gaseous sulfur compounds are critical climate active volatile components released by volcanoes. Volcanic eruptions can emit massive amounts of H 2 S and SO 2 into the atmosphere, which react with oxygen and H 2 O to sulfuric acid. Formation of H 2 SO 4 aerosols, which have on a geological timescale short-term residence times of month or years, may have global climatic impact. The phase stability of sulfur-bearing minerals such as anhydrite in erupting magmas may be a key controlling factor limiting SO 2 emission during subaerial volcanic activity (Huang and Keppler, January 2015 issue of American Mineralogist ).

Improving the reliability of road materials based on micronized sulfur composites

The work contains the results of a nano-structural modification of sulfur that prevents polymorphic transformations from influencing the properties of sulfur composites where sulfur is present in a thermodynamic stable condition that precludes destruction when operated. It has been established that the properties of sulfur-based composite materials can be significantly improved by modifying sulfur and structuring sulfur binder by nano-dispersed fiber particles and ultra-dispersed state filler. The paper shows the possibility of modifying Tengiz sulfur by its fragmenting which ensures that the structured sulfur is structurally changed and stabilized through reinforcement by ultra-dispersed fiber particles allowing the phase contact area to be multiplied. Interaction between nano-dispersed fibers of chrysotile asbestos and sulfur ensures the implementation of the mechanical properties of chrysotile asbestos tubes in reinforced composite and its integrity provided that the surface of chrysotile asbestos tubes are highly moistened with molten sulfur and there is high adhesion between the tubes and the matrix that, in addition to sulfur, contains limestone microparticles. Ability to apply materials in severe operation conditions and possibility of exposure in both aggressive medium and mechanical loads makes produced sulfur composites required by the road construction industry.

RETRACTED: The biocorrosion of city sewer collector impregnated special polymer sulfur binder – Polymerized sulfur applied as the industrial waste material

RETRACTED: The biocorrosion of city sewer collector impregnated special polymer sulfur binder – Polymerized sulfur applied as the industrial waste material

RETRACTED: The influence of penetrating special polymer sulfur binder – Polymerized sulfur applied as the industrial waste material on concrete watertightness

RETRACTED: The influence of penetrating special polymer sulfur binder – Polymerized sulfur applied as the industrial waste material on concrete watertightness