Alternative landfill capping using locally available recycled material

2003 ◽  
Vol 11 (4) ◽  
pp. 419-427
Author(s):  
Ernst Biener ◽  
Harald Bethke ◽  
Torsten Sasse ◽  
Thomas Wemhoff
Keyword(s):  
Recycled Material

scholarly journals Coatings with recycled polyvinyl butyral on polyester and polyamide mono- and multifilament yarns

2021 ◽  
Author(s):  
Rike Brendgen ◽  
Carsten Graßmann ◽  
Thomas Grethe ◽  
Boris Mahltig ◽  
Anne Schwarz-Pfeiffer
Keyword(s):  
Mechanical Properties ◽  
Chemical Resistance ◽  
Crosslinking Agent ◽  
Polyvinyl Butyral ◽  
Polymer Dispersion ◽  
Safety Glass ◽  
Enhanced Properties ◽  
Multifilament Yarns ◽  
Textile Coating ◽  
Recycled Material

AbstractPolyvinyl butyral is used in safety glass interlayers, mainly in car windshields. Legislative regulations require a recycling of cars after their lifetime and therefore also their safety glass. This causes the availability of recycled polyvinyl butyrate (r-PVB) originated from safety glass interlayers. Due to deteriorated optical properties, such as the transparency, and unknown amounts of plasticizers, it is challenging to reuse the recycled material in new windshields. Therefore, it is of particular interest to find new fields of application for r-PVB, such as the usage as a textile coating. In this research, r-PVB was investigated as a material for yarn coating. Polyester and polyamide mono- and multifilament yarns were coated continuously with solely a polymer dispersion and with mixtures of crosslinking agent and polymer dispersion. Crosslinked r-PVB coatings showed enhanced properties toward abrasion and chemical resistance. Coatings without the crosslinking agent showed a diminished abrasion resistance and could be washed off with ethanol. Mechanical properties of the monofilaments were influenced by the r-PVB coating in general. However, varying concentrations of the crosslinking agent did not affect the mechanical properties.

scholarly journals Implementation of the emulsification-diffusion method by solvent displacement for polystyrene nanoparticles prepared from recycled material

RSC Advances ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 2226-2234
Author(s):  
Ana María Pineda-Reyes ◽  
Mauricio Hernández Delgado ◽  
María de la Luz Zambrano-Zaragoza ◽  
Gerardo Leyva-Gómez ◽  
Nestor Mendoza-Muñoz ◽  
...  
Keyword(s):  
Expanded Polystyrene ◽  
Added Value ◽  
Diffusion Method ◽  
Displacement Method ◽  
Polystyrene Nanoparticles ◽  
Solvent Displacement ◽  
Recycled Material

A novel solvent emulsification-displacement method for obtaining polystyrene nanoparticles is reported. This process has an added value and can be an alternative for the recycling of expanded polystyrene.

Durability of Cement Stabilized Cold-Recycled of Asphalt Pavement Materials

2012 ◽  
Vol 174-177 ◽  
pp. 1188-1192 ◽  
Author(s):  
Lian Yu Wei ◽  
Zhi Yu Guo
Keyword(s):  
Asphalt Pavement ◽  
Base Material ◽  
Road Construction ◽  
Thermal Shrinkage ◽  
Construction Process ◽  
Pavement Materials ◽  
Road Base ◽  
Wide Range ◽  
Dry Shrinkage ◽  
Recycled Material

In recent years, due to the dual pressures of resources and the environment,the clod recycled technology renovation and expansion of the old road and new road construction process increasingly attention increasingly wide range of applications. In this paper, the water stability of the cold recycled materials in asphalt pavement on cement additives, frozen stability, thermal shrinkage resistance, dry Shrinkage thefour indicators of experiments to evaluate its durability, and compared with the typical semi-rigid material. To verify the feasibility of the cold recycled material as road base material.

RUBBER RECYCLING: CHEMISTRY, PROCESSING, AND APPLICATIONS

2012 ◽  
Vol 85 (3) ◽  
pp. 408-449 ◽  
Author(s):  
Marvin Myhre ◽  
Sitisaiyidah Saiwari ◽  
Wilma Dierkes ◽  
Jacques Noordermeer
Keyword(s):  
Process Safety ◽  
Tire Industry ◽  
Ground Rubber ◽  
Rubber Surface ◽  
Rubber Recycling ◽  
Property Loss ◽  
Recycled Rubber ◽  
Cost Factors ◽  
Broad Interest ◽  
Recycled Material

ABSTRACT For both environmental and economic reasons, there is broad interest in recycling rubber and in the continued development of recycling technologies. The use of postindustrial materials is a fairly well-established and documented business. Much effort over the past decade has been put into dealing with of end-of-life tires from landfills and vacant fields. It is only in the last few years that more business opportunities for recycled rubber have come to the forefront. Reclaiming rubber has gained increasing interest, more so in Europe than in North America. In those areas, much work has been done to refine the processes used. The major form of recycled rubber is still ground rubber. This is produced either by cryogenic, ambient, or wet grinding. The material is then used neat with sulfur/curatives, binders, or cements. The binders are normally moisture curable urethanes, liquid polybutadienes, or latex to produce items such as mats, floor tiles, and carpet undercushion. Recycled rubber is still used as tire derived fuel, but less so than 10 years ago. Another outlet is as an additive to asphalt. Recycled rubber can be used in the plastics industry, for which much development is being done. Large particle size ground rubber or chips are used in civil engineering applications, landscaping, or artificial turf. In terms of applications, most use is outside of the conventional rubber industry. Cost factors are still addressed in the tire industry. As of 2012, approximately 8–10% recycled material is used in tires. The biggest obstacles to further adaption are safety factors and property loss. Better methods are needed for treating or modifying the rubber surface and for regenerating the rubber through devulcanization. Devulcanization gives the highest quality recycled material in terms of processing and properties. However, shortcomings to devulcanization are reduced process safety and odorous chemicals that are required at present.

Steel: friend or foe in the face of the climate emergency?

2021 ◽  
Author(s):  
Walter Swann ◽  
Francois Hanus ◽  
Olivier Vasart ◽  
Alan Knight
Keyword(s):  
Built Environment ◽  
Carbon Emissions ◽  
Circular Economy ◽  
High Potential ◽  
If Steel ◽  
Embodied Carbon ◽  
The World ◽  
The Face ◽  
Zero Carbon ◽  
Recycled Material

<p>Steel is the most recycled material in the world and a key contributor to the circular economy, but todays primary steelmaking methods result in high embodied carbon. In the face of the climate emergency, designers have been tasked with driving down the upfront emissions of the built environment. Naturally the embodied carbon characteristics of all materials have been put under the microscope and those with high impacts are being demonised, primary steel is one of those. So how does a designer balance the immediate needs of the climate emergency with the future needs of society? When confronted with a material like steel with practically perfect circularity characteristics but high embodied impacts how do designers balance the needs of today with those of tomorrow? What if steel could be made with zero carbon emissions? Coupled with its high potential for re-use and its high recycling rates is steel a friend and ally in the face of the climate emergency rather than a foe?</p>

Application of Eco-Efficiency Analysis to Assess Three Different Recycling Technologies for Carbon Fiber Reinforced Plastics (CFRPs)

2017 ◽  
Vol 742 ◽  
pp. 593-601
Author(s):  
Michael Dieterle ◽  
Elisa Seiler ◽  
Tobias Viere
Keyword(s):  
Carbon Fiber ◽  
Energy Demand ◽  
Economic Assessment ◽  
Industrial Scale ◽  
Primary Data ◽  
Fiber Reinforced ◽  
Ecological Data ◽  
Reinforced Plastics ◽  
Carbon Fiber Reinforced ◽  
Recycled Material

The purpose of this paper is to evaluate the eco-efficiency of three different recycling technologies for carbon fiber reinforced plastic (CFRP) waste, and to identify the preferable and most efficient solution. Recycling via mechanical shredding, microwave pyrolysis and subcritical solvolysis is compared and comprehensive primary data on energy demand and process throughput are examined. Following an ecological and economic assessment, the results are normalized and summarized into three single-score indicators. To decide which solution is most efficient, economic and ecological data are plotted on an eco-efficiency portfolio. The achieved results demonstrate that the eco-efficiency of the recycling technologies investigated is entirely positive on an industrial scale, and that the efficient use of CFRPs across the entire life cycle is possible. The material recycling of CFRP waste is consequently a promising topic for future development. The use of recycled material as conductivity additives in secondary applications can be considered as a valuable option for all three technologies, although the benefits of recycling are strongly dependent on the quality and quantity of the recycled material. Depending on the resources substituted in a secondary application, different recycling technologies offer considerable advantages. To ensure a consistently high quality of output materials on an industrial scale, specific process parameters have to be identified, for which, further research is necessary.

scholarly journals THE INFLUENCE OF THE USE OF RECYCLED GYPSUM ON THE PROPERTIES OF GYPSUM PRODUCTS IN LABOR CONDITIONS

2020 ◽  
Vol 26 ◽  
pp. 81-85
Author(s):  
Hana Sekavová ◽  
Jakub Herrmann ◽  
Zdeněk Prošek ◽  
Miroslav Nyč ◽  
George Karra’a
Keyword(s):  
Flue Gas ◽  
Flue Gas Desulfurization ◽  
Volume Changes ◽  
Fgd Gypsum ◽  
Labor Conditions ◽  
Setting Times ◽  
Elasticity Module ◽  
First Results ◽  
Recycled Gypsum ◽  
Recycled Material

The article presents the first results from research, which is deal with recycling of plaster boards and use of the resulting material. The research is carried out within the project MPO Trio c. FV30359 “Recyklace sádrokartonových desek a nová materiálová využití s pridanou hodnotou – GIPSRec”. The plasterboards are produced of stucco, which is calcinated of Flue Gas Desulfurization Gypsum (FGD Gypsum). There is possibility to replace a part of this stucco with recycled material. There is opportunity for saving costs for production. The question how this utilization can change the properties of the products is very important and it is necessary to find the possible improvement or deterioration. This is the objective of this research. The effect on properties was monitored on the samples which was prepared of only pure stucco and of stucco with part of recycled material. There was observed water ratio (splash test), setting times, volume changes, flexural strength, compressive strength and elasticity module.

scholarly journals Experimental Study on Recycling of Bituminous Aggregate in Cement Concrete

2021 ◽  
Vol 9 (VI) ◽  
pp. 5392-5398
Author(s):  
Manoj Kumar Mishra
Keyword(s):  
Experimental Study ◽  
Road Construction ◽  
Construction Cost ◽  
Recycled Aggregate ◽  
Recycled Aggregates ◽  
Cement Concrete ◽  
Cost Component ◽  
The Road ◽  
Total Construction Cost ◽  
Recycled Material

Recycling of bituminous aggregates in cement concrete has been selected for the present study to determine suitability of recycled material in road construction. This will help in achieving economy in road construction as well as saving on environment degradation in term of reduced mining and less pollution. Construction and maintenance of roads and highways involve millions of tonnes of aggregate. Considering the scarcity of fresh aggregate, replacement of part of the fresh aggregate with recycled aggregate is considered in the present study. Construction of the road is quite cost intensive. Material alone cost more than 60% of the total construction cost, out of which aggregate cost component, is approximately 30%. We can use recycled aggregate in place of fresh aggregate in construction of road and provide economy to the project. For making best use of recycled aggregates, it is essential to study the suitability of the same in various pavement components. In the present study recycled aggregate are used in Granular Sub Base (GSB) and Wet Mix Macadam (WMM).

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