scholarly journals A Multifaceted Approach for Cryogenic Waste Tire Recycling

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2494
Author(s):  
Darkhan Yerezhep ◽  
Aliya Tychengulova ◽  
Dmitriy Sokolov ◽  
Abdurakhman Aldiyarov
Keyword(s):  
Cryogenic Treatment ◽  
Glassy State ◽  
Life Quality ◽  
Crumb Rubber ◽  
Waste Recycling ◽  
Industrial Wastes ◽  
Mechanical Shock ◽  
Recycling Process ◽  
Environmental Friendliness ◽  
Numerical Studies

One of the important aspects for degradation of the life quality is the ever increasing volume and range of industrial wastes. Polymer wastes, such as automotive tire rubber, are a source of long-term environmental pollution. This paper presents an approach to simplifying the rubber waste recycling process using cryogenic temperatures. The temperature of cryogenic treatment is ranged from 77 K to 280 K. Liquid nitrogen was used as a cryoagent for laboratory tests. Experimental and numerical studies have been carried out to determine the optimal conditions for the recycling process. Numerical studies were performed using the COMSOL Multiphysics cross-platform software. The optimal force of mechanical shock for the destruction of a tire which turned into a glassy state after cryoexposure was determined experimentally. The chemical and physical properties of the final product (crumb rubber) have been studied by scanning electron microscopy and energy dispersive X-ray spectroscopy. The analysis shows that the morphology and elemental composition of the samples remain practically unchanged, demonstrating environmental friendliness of the proposed process.

scholarly journals Fatigue Resistance Characterization of Warm Asphalt Rubber by Multiple Approaches

2018 ◽  
Vol 8 (9) ◽  
pp. 1495 ◽  
Author(s):  
Jiangmiao Yu ◽  
Xianshu Yu ◽  
Zheming Gao ◽  
Feng Guo ◽  
Duanyi Wang ◽  
...  
Keyword(s):  
Fatigue Test ◽  
Fatigue Resistance ◽  
Crumb Rubber ◽  
Waste Recycling ◽  
Fatigue Performance ◽  
Four Point Bending ◽  
Asphalt Rubber ◽  
Shear Fatigue ◽  
Tensile Fatigue ◽  
Indirect Tensile

Warm asphalt rubber (WAR) mixture is a sustainable paving material with advantages including waste recycling and noise reducing. A comprehensive understanding of the fatigue performance of WAR specimens is helpful to its wide application. However, research on evaluating the fatigue performance of WAR binder and mixtures is very limited. This paper applies five fatigue analysis approaches to evaluate the fatigue life of WAR samples with three different warm mix asphalt (WMA) additives. The conventional G*sinδ, linear amplitude sweep (LAS), indirect tensile fatigue test (ITFT), and four-point bending beam (4PB) test were conducted based on available standards. In addition, a novel shear fatigue test was performed on WAR mortars. Test results indicated that the incorporation of crumb rubber has a significantly positive effect on fatigue resistance. WAR with chemical and foaming additives exhibited a poorer performance than asphalt rubber (AR), but their fatigue performance was still greatly superior to the non-rubberized samples. Finally, LAS as well as mortar shear fatigue and 4PB tests provided the same prediction of fatigue resistance, while the results of G*sinδ and the ITFT were inconsistent. It is recommended to use LAS, the mortar shear fatigue test, and the 4PB test for the fatigue resistance evaluation of rubberized specimens. The validation of the findings with more materials and field performances is recommended.

scholarly journals Decorative concrete on white cement: resource provision, technology, properties and cost-effectiveness

2018 ◽  
Vol 212 ◽  
pp. 01023 ◽  
Author(s):  
Vasily Vorobchuk ◽  
Maria Matveeva ◽  
Artem Peshkov
Keyword(s):  
Cost Effectiveness ◽  
Chemical Composition ◽  
Raw Materials ◽  
Special Kind ◽  
Physicomechanical Properties ◽  
Industrial Wastes ◽  
Environmental Friendliness ◽  
White Cement ◽  
The Cost ◽  
Experimental Researches

Decorative concrete refers to a special kind of concrete. Products made of decorative concrete must meet, in addition to the increased requirements for appearance, certain architectural expressiveness and also certain indicators for strength, durability, and environmental friendliness. In addition, one should strive to reduce the cost of both decorative concrete and products made of such concrete. The analysis is carried out, experimental researches of qualitative indicators of industrial man-caused wastes are also studied: carbide lime, fluoride, sludge-lignin, their material and chemical composition. The possibility of using the analyzed industrial wastes as raw materials for production of white and color cements is established. The physicomechanical properties of the obtained cements and decorative concretes on their basis are studied, the economic efficiency of the proposed technology is determined.

scholarly journals Potential Utilization of Sewage Sludge from Water Treatment Plant as Brick Material

2018 ◽  
Vol 73 ◽  
pp. 05001
Author(s):  
Budi Prasetyo Samadikun ◽  
Siti Rukayah ◽  
Ika Bagus Priyambada ◽  
Sry T. Romaito Lumbantobing ◽  
Mochamad Arief Budihardjo
Keyword(s):  
Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Waste Recycling ◽  
Raw Material ◽  
Recycling Process ◽  
Economic Problems ◽  
Water Treatment Process ◽  
Research Findings ◽  
Sludge Waste

One of the results of the water treatment process is the sludge. Generally, the processed sludge from the water treatment is collected and delivered to a landfil. With the delivery of sludge waste, it requires additional cost as a levy in handling sludge waste. Therefore, it is needed to innovate on the recycling of sludge. The waste recycling process is expected to minimize the residual impact of the Water Treatment Plant. The process of waste recycling can be done by utilizing sludge from water treatment, which is brick making process. The benefits can eliminate environmental problems and also some economic problems. This study aims to determine the potential of sludge from water treatment plant to be added for brick making by investigating the physical and characteristics of sludge. The research findings show that sludge waste has the potential to become a brick raw material depending on the nature and clay microstructure

scholarly journals Is Recycling Always the Best Option? Environmental Assessment of Recycling of Seashell as Aggregates in Noise Barriers

Processes ◽  
2020 ◽  
Vol 8 (7) ◽  
pp. 776
Author(s):  
Begoña Peceño ◽  
Carlos Leiva ◽  
Bernabé Alonso-Fariñas ◽  
Alejandro Gallego-Schmid
Keyword(s):  
Life Cycle ◽  
Environmental Impacts ◽  
Waste Recycling ◽  
Point Of View ◽  
Raw Material ◽  
Recycling Process ◽  
Noise Barriers ◽  
Noise Barrier ◽  
Pre Treatment ◽  
Natural Aggregates

Waste recycling is an essential part of waste management. The concrete industry allows the use of large quantities of waste as a substitute for a conventional raw material without sacrificing the technical properties of the product. From a circular economy point of view, this is an excellent opportunity for waste recycling. Nevertheless, in some cases, the recycling process can be undesirable because it does not involve a net saving in resource consumption or other environmental impacts when compared to the conventional production process. In this study, the environmental performance of conventional absorption porous barriers, composed of 86 wt % of natural aggregates and 14 wt % cement, was compared with barriers composed of 80 wt % seashell waste and 20 wt % cement through an attributional cradle-to-grave life cycle assessment. The results show that, for the 11 environmental impact categories considered, the substitution of the natural aggregates with seashell waste involves higher environmental impacts, between 32% and 267%. These results are justified by the high contribution to these impacts of the seashell waste pre-treatment and the higher cement consumption. Therefore, the recycling of seashells in noise barrier manufacturing is not justified from an environmental standpoint with the current conditions. In this sense, it could be concluded that life cycle assessments should be carried out simultaneously with the technical development of the recycling process to ensure a sustainable solution.

Research on RFID Technology in Electronic Waste Recycling

2013 ◽  
Vol 303-306 ◽  
pp. 2211-2214
Author(s):  
Fu Yu Li ◽  
Qi Wang ◽  
Zhe Kun Li ◽  
Yong Xin Peng
Keyword(s):  
Radio Frequency Identification ◽  
Electronic Waste ◽  
Recovery Process ◽  
Waste Recycling ◽  
Information Collection ◽  
System Support ◽  
Rfid Technology ◽  
Recycling Process ◽  
Frequency Identification ◽  
Electronic Waste Recycling

The number of E-wastes in China is more and more amazing in recent years, but it is lack of effective information system support and advanced means of information collection in the recovery process. In the paper, according to the circular economy "3r" principle and the characteristics of RFID (radio frequency identification) technology the author constructed a based on RFID E-waste recycling model. In the whole recycling process it can maintain the integrity of the information, real-time, so as to strengthen the enterprise for product whole life process control and it is helpful to the poisonous and harmful material of the recovery, reduce impact on environment.

Development of Metal Recycling Process from Decommissioned Nuclear Power Plants

1999 ◽  
Vol 556 ◽  
Author(s):  
T. Ishikura ◽  
S. Abe ◽  
H. Sakai ◽  
J. Takahashi
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Power Plants ◽  
Waste Recycling ◽  
Disposal Site ◽  
Limited Capacity ◽  
Recycling Process ◽  
Separation Techniques ◽  
Metal Recycling

AbstractDismantling and demolition of a nuclear power plant generates a large amount of metal waste. Recycling of such waste for resource is important because of the limited capacity of the disposal site. Authors have developed metal recycling processes. It is found that pyrometallurgical separation techniques can effectively separate nickel and cobalt, which contain main contributors of radioactivity, from iron and chromium.

Experiences with the utilization of wastes in nursery potting mixes and as field soil amendments

1999 ◽  
Vol 79 (1) ◽  
pp. 139-148 ◽  
Author(s):  
Calvin Chong
Keyword(s):  
Agricultural Land ◽  
Paper Mill ◽  
Waste Recycling ◽  
Organic Wastes ◽  
Industrial Wastes ◽  
Organic Fertilizers ◽  
Field Soil ◽  
Mushroom Compost ◽  
Paper Mill Sludge ◽  
Conducting Research

The nursery/landscape industry has been one of the fastest growing agricultural sectors in Canada. Since 1980s, the Ornamental Nursery Research Program at the Horticultural Research Institute of Ontario (HRIO) has been conducting research which focuses on environmentally friendly production practices. Emphasis is on the use of composted or uncomposted organic wastes as amendments in container potting mixes. Various projects have evaluated mixes derived from wastes such as spent mushroom compost, paper mill sludge, apple pomace, and various types of barks. In the late 1980s and early 1990s, the scope of the research expanded to include composting and a wider assortment of wastes such as waxed corrugated cardboard, municipal solid waste compost, wood chips from pallets and furniture and demolition wastes, food wastes, and organic fertilizers manufactured from meat by-products, and selected industrial wastes. Presently, paper mill sludge is being evaluated as field soil amendment for growing nursery shade trees and also for use in rehabilitating marginal, non-agricultural land. Key words: Waste recycling, land rehabilitation, composts, organic wastes, container culture, shade tree culture, ornamentals, nutrition

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