Study of Devulcanised Crumb Rubber-Peat Bio-Based Composite for Environmental Applications

2019 ◽  
Vol 799 ◽  
pp. 148-152 ◽  
Author(s):  
Vjaceslavs Lapkovskis ◽  
Viktors Mironovs ◽  
Kristine Irtiseva ◽  
Dmitri Goljandin
Keyword(s):  
Particle Size ◽  
Composite Material ◽  
Oil Spill ◽  
Rubber Particle ◽  
Crumb Rubber ◽  
Raw Material ◽  
Environmental Applications ◽  
Porous Substrate ◽  
Spilled Oil ◽  
Final Composite

A proper recycling and secondary reuse of end-of-life car tires (ELTs) remain an important issue for many regions. Devulcanised crumb rubber as a product of ELT recycling could be used for very different applications, including site remediation by spilled oil products. In current paper a development of new bio-based composite material containing devulcanised crumb rubber and cenospheres is suggested. Designed bio-based composite can be used as a oil spill adsorbent, material for civil engineering, and as a raw material for further modification by introduction of ferromagnetic components. Homogenised peat with peat content 14.0 ± 1.5 wt%, particle size 0.01 – 0.5 mm used as a natural bio-based binder. Devulcanised crumb rubber particle size 1.0 – 4.0 mm was used as a porous substrate. Designed compositions contained 5, 10, 15, 20 wt% (before drying) of devulcanised crumb rubber. Cenospheres have duplex function for designed composite: lightweight additive that makes final product floatable, and at the same time minimises shrinkage of dried product. It was found that devulcanised crumb rubber reduces density of final composite and adding open porosity. Developed bio-based composites could be manufactured in granules by drum granulation technique for further environmental applications. Formability and apparent density of bio-based composite are studied.

Influence of Rubber Particle Size on Functional Properties of a Composite Material Based on Scrap Tires and a Polymer Binder

2020 ◽  
Vol 850 ◽  
pp. 107-111
Author(s):  
Laimonis Mālers ◽  
Agnija Cirvele
Keyword(s):  
Particle Size ◽  
Composite Material ◽  
Functional Properties ◽  
Material Properties ◽  
Rubber Particle ◽  
Polymer Binder ◽  
Scrap Tires ◽  
Elongation At Break ◽  
Rubber Particles ◽  
Purposeful Selection

Functional properties of composite material based on mechanically grinded scrap tires with different particle size of fractioned crumb and polyurethane type polymer binder were investigated to estimate influence of rubber particles size and content on composite material properties (Shore C hardness, compressive stress at 10 % deformation, tensile strength, elastic modulus and elongation at break, apparent density). Optimization possibilities of composite material consisting of rubber particles with different sizes or fractions were investigated. The obtained results show that variation of composition of the composite material by changing size of rubber granulate have definite influence on selected properties of the material. Purposeful selection and mutual combination of rubber particles size included in material can ensure desirable and predictable mechanical properties of composite material.

scholarly journals Partial replacement of conventional fine aggregate with crumb tyre rubber in structural concrete – effect of particle size on compressive strength and time dependent deformations

2018 ◽  
Vol 199 ◽  
pp. 11002
Author(s):  
Kudzai Mushunje ◽  
Mike Otieno ◽  
Yunus Ballim
Keyword(s):  
Particle Size ◽  
Compressive Strength ◽  
Creep Behaviour ◽  
Rubber Particle ◽  
Crumb Rubber ◽  
Target Strength ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Structural Applications ◽  
Shrinkage And Creep

This paper presents results of a study into the effects of truck tyre crumb rubber particle size, as fine aggregate, on the compressive strength, shrinkage and creep behaviour of structural rubberised concrete. The study is motivated by a growing interest in the use of concrete with waste tyre rubber particles, rubberised concrete, for structural applications. Three tyre crumb rubber sizes (2.36, 1.18 and 0.425 mm) were used to replace 10% by volume of fine mineral aggregates to produce concrete with a target strength of 30 MPa. The concrete was cast water-cured for 28 days and tested for shrinkage and creep for 180 days. Half of the shrinkage and creep samples were sealed with a bitumen seal to prevent drying during testing. Results show a general a decrease in compressive strength with reduction in crumb rubber size. The strength decreases by 22%, 23% and 27% for the 2.36, 1.18 and 0.425 mm mix respectively. Preliminary results show a general increase in both shrinkage and creep deformations in both drying and sealed conditions. The observed increases were checked against the limits provided in design codes to assess the applicability of the material for structural purposes.

scholarly journals Composite material based on andesite of Transcarpathia

2020 ◽  
pp. 13-17
Author(s):  
L.I. Melnyk ◽  
L.P. Chernyak ◽  
O.V. Kozlovets
Keyword(s):  
Particle Size ◽  
Composite Material ◽  
Composite Materials ◽  
Raw Material ◽  
Material Base ◽  
Adhesion Forces ◽  
Resource Saving ◽  
Abrasive Resistance ◽  
Quantitative Ratio ◽  
By Products

Composite materials for various purposes are made on the basis of initial mixtures of fillers and bonding components. The varieties of these components and their quantitative ratio determine the qualitative indicators of the composite. This causes rosettes of the raw material base for the production of composites, including the use of by-products of mineral extraction, which meets the objectives of resource saving. This paper presents the results of the study of composite materials on the basis of by-products of extraction of igneous rocks of Transcarpathia - siftings of andesite as a filler and copolymer Latex 2012 as a matrix. The analysis of chemical and mineralogical composition of andesite siftings from Khust quarry was carried out. An analysis of the dependence of the main physical and mechanical characteristics of the studied composites on the concentration of andesite in the range of 55-85 wt. % and of the corresponding change in the quantitative ratio of filler and copolymer is performed. Differences in parameters using andesite samples with different particle size distribution (the poly-fractional with particle size ˂ 3 mm and the dispersion one with particle size ˂ 0.5 mm) were determined. The peculiarities of the formation of the pore structure of the composite material obtained using andesite samples of different granulometry connected with the increasing degree of dispersion associated with the increase in the number of filler particles in the composite, increasing adhesion forces in the copolymer-filler system and increasing of surface energy of andesite particles are shown. The possibility of increasing the abrasive resistance of the composite material when using the initial mixture based on the andesite-copolymer system has been experimentally confirmed.

Effect of Crumb Rubber Particle Size and Content on Properties of Crumb Rubber Modified (CRM) Asphalt

2011 ◽  
Vol 99-100 ◽  
pp. 955-959 ◽  
Author(s):  
Wei Dong Cao ◽  
Shu Tang Liu ◽  
Xin Zhuang Cui ◽  
Xiao Qing Yu
Keyword(s):  
Particle Size ◽  
High Temperature ◽  
Reaction Time ◽  
Reaction Temperature ◽  
Rubber Particle ◽  
Crumb Rubber ◽  
Particle Sizes ◽  
Test Results

Effects of crumb rubber of different particle sizes (20mesh, 40mesh, 60mesh, 80mesh and120mesh) and contents (10%, 15% and 20% by weight of the total of CRM asphalt) on the properties of CRM asphalt and change rule of performance of CRM asphalt with reaction temperature and time were studied in laboratory. The results indicate that CRM asphalt has the best performance when the particle size of crumb rubber used is 80 mesh and the content is 15%. The performance of CRM asphalt is strongly depended on reaction temperature and time. When reaction temperature is higher than 200°C and time more than 60 minutes, the viscosity of CRM asphalt significantly decline with reaction temperature rising and time delaying. The performance of CRM asphalt starts aging when reaction time more than 4 hours at high temperature. Based on test results, some suggestions for production and application of CRM asphalt are put forward.

scholarly journals The Effect of Crumb Rubber Particle Size to the Optimum Binder Content for Open Graded Friction Course

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Mohd Rasdan Ibrahim ◽  
Herda Yati Katman ◽  
Mohamed Rehan Karim ◽  
Suhana Koting ◽  
Nuha S. Mashaan
Keyword(s):  
Particle Size ◽  
Rubber Particle ◽  
Mesh Size ◽  
Crumb Rubber ◽  
Binder Content ◽  
Air Voids ◽  
Porous Asphalt ◽  
The Road ◽  
Open Graded Friction Course

The main objective of this paper is to investigate the relations of rubber size, rubber content, and binder content in determination of optimum binder content for open graded friction course (OGFC). Mix gradation type B as specified in Specification for Porous Asphalt produced by the Road Engineering Association of Malaysia (REAM) was used in this study. Marshall specimens were prepared with four different sizes of rubber, namely, 20 mesh size [0.841 mm], 40 mesh [0.42 mm], 80 mesh [0.177 mm], and 100 mesh [0.149 mm] with different concentrations of rubberised bitumen (4%, 8%, and 12%) and different percentages of binder content (4%–7%). The appropriate optimum binder content is then selected according to the results of the air voids, binder draindown, and abrasion loss test. Test results found that crumb rubber particle size can affect the optimum binder content for OGFC.

Influence of crumb rubber particle size and SBS structure on properties of CR/SBS composite modified asphalt

2020 ◽  
Vol 235 ◽  
pp. 117517 ◽  
Author(s):  
Chengduo Qian ◽  
Weiyu Fan ◽  
Guoming Yang ◽  
Ling Han ◽  
Baodong Xing ◽  
...  
Keyword(s):  
Particle Size ◽  
Rubber Particle ◽  
Crumb Rubber ◽  
Modified Asphalt

scholarly journals Pengembangan Alat Grading Limbah Serbuk Gergaji untuk Pemanfaatannya sabagai Bahan Campuran Komposit

2017 ◽  
Vol 10 (1) ◽  
pp. 65-79
Author(s):  
Muhammad Makky ◽  
Leo Saputra Napitu ◽  
Khandra Fahmy
Keyword(s):  
Particle Size ◽  
Composite Material ◽  
Raw Materials ◽  
Timber Harvesting ◽  
Raw Material ◽  
Specific Power ◽  
Working Capacity ◽  
Wood Processing ◽  
Machine Performance ◽  
Operation Process

Abstrak. Sampai saat ini kegiatan pemanenan dan pengolahan kayu di Indonesia masih menghasilkan limbah dalam jumlah yang besar. Pada umumnya serbuk gergaji dari industri perkayuan memiliki bentuk, ukuran dan jumlah yang beragam, sedangkan untuk pemanfaatannya sebagai bahan baku campuran komposit dibutuhkan ukuran bahan serbuk gergaji yang berbeda dengan ukuran tertentu. Adapun ukuran umum yang digunakan untuk pembuatan bahan campuran komposit terdiri partikel berukuran 80 mesh, 40 mesh, 20 mesh, dan 10 mesh. Pemisahan ukuran serbuk gergaji berdasarkan keempat ukuran mesh tersebut diperlukan agar mempermudah dalam memperoleh bahan baku komposit. Penelitian bertujuan untuk merancang alat grading limbah serbuk gergaji untuk digunakan sebagai bahan baku campuran komposit. Proses penelitian ini meliputi pembuatan alat grading serbuk gergaji serta melakukan uji fungsional. Penelitian ini menghasilkan alat grading yang dapat memimsahkan serbuk gergaji berdasarkan empat ukuran berbeda dalam satu kali proses pengayakan. Hasil dari pengujian alat grading ini adalah: (1) alat grading limbah serbuk gergaji, yang memiliki kapasitas kerja sebesar 28,49 Kg/jam, (2) didapatkan nilai rata-rata modulus kehalusan dari masing-masing mesh 10, 20, 40 dan 80 berturut-turut yaitu : 889 gram, 651 gram, 431 gram, dan 168 gram. Sedangkan untuk indeks keseragaman hasil ayakan kasar (80 mesh), sedang (20 mesh dan 40 mesh), dan halus 80 mesh berturut – turut dari ulangan 1, ulangan 2, dan ulangan 3 adalah 5 : 4 : 1, 5 : 4 : 1, dan 5 : 4 : 1. (3) Daya spesifik yang dibutuhkan untuk mencapai kapasitas kerja 28,49 Kg/jam adalah 0,0001568 kW.jam/Kg. (4) didapatkan nilai rendemen sebesar 77,37 %. (5) alat grading limbah serbuk gergaji dengan biaya pokok alat grading sebesar Rp. 243,36/Kg. Development of Sawmill-Waste Grading for Composite Material UtilizationAbstract. Timber harvesting and wood processing in Indonesia produces wastes in large quantities. The waste materials come in variety of shapes, sizes and quantities. For adding the value of these wastes, such as for composite raw material, the particle-size should be uniform, and segregated into different categories. The general particle-size for manufacturing composite materials are 80, 40, 20 and 10 mesh. Therefore, separating the sawmills wastes based on these sizes is necessary in order to utilize it as raw materials for composite production. The study aims to develop a prototype of sawmill-waste grading machine for composite material utilization, and added the value of the waste for application as a raw material for the composite design. The methods includeddesign and manufacturing of a sawmill-waste grading machine as well as performing different tests. The prototype successfully grade and segregrate the sawmills-wastes into four different particles-sizes in a single operation process. The results showed that the machine working capacity is 28.49 Kg.hr-1, while the materials segregrate into four particle-sizes obtained mean of modulus of fineness for each group-size (10, 20, 40 and 80 mesh) are889, 651, 431, and 168 grams respectively. While for the uniformity index of large (10 mesh), medium (20 and 40 mesh), and fine (80 mesh) particles are 5, 4, and 1 respectively, obtained from three replication tests. The specific power required to achieve the working capacity of 28.49 Kg / hr is 0.0001568 kW.hr.kg-1. Overall, the machine performance achieved the efeciency of 77,37%, and the cost for grading the sawmill-waste material is Rp. 243,36 kg-1.

Storage Problems of Poplar Chips from Short Rotation Plantations with Special Emphasis on Fungal Development

2012 ◽  
Vol 8 (1) ◽  
pp. 123-132 ◽  
Author(s):  
Zsuzsanna Horváth ◽  
Béla Marosvölgyi ◽  
Christine Idler ◽  
Ralf Pecenka ◽  
Hannes Lenz
Keyword(s):  
Particle Size ◽  
Health Risk ◽  
Dry Matter ◽  
Ph Value ◽  
Wood Chips ◽  
Raw Material ◽  
Special Focus ◽  
Fungal Development ◽  
Short Rotation ◽  
Fungal Particles

Abstract - There are several problems in storing wood chips freshly harvested from short rotation plantations, which result in quality losses as well as in dry matter and energy losses. The factors influencing the degradation of raw material are examined in this paper with special focus on fungal development. An excessive growth of fungi is connected to dry matter losses and also to an increased health risk during raw material handling. The following factors were measured during 6 months storage of poplar wood chips depending on particle size: box temperature, moisture content, pH-value, appearance of fungi in the storage and the concentration of fungal particles in the air. The results show a close connection between particle size, temperature and attack of fungi. During the storage mesophilic and termophilic species of the genera Alternaria, Aspergillus, Cladosporium, Mucor and Penicillium appeared. The concentration of fungal particles is the highest for fine chips and decreases in bigger particles. There was a special focus on the investigation of the properties of coarse chips (G 50), which represent a good compromise between handling, storage losses and health risk due to fungal development.

scholarly journals Study of the Physical Behavior of a New Composite Material Based on Fly Ash from the Combustion of Coal in an Ultra-Supercritical Thermal Power Plant

2021 ◽  
Vol 5 (6) ◽  
pp. 151
Author(s):  
Mustapha El Kanzaoui ◽  
Chouaib Ennawaoui ◽  
Saleh Eladaoui ◽  
Abdelowahed Hajjaji ◽  
Abdellah Guenbour ◽  
...  
Keyword(s):  
Composite Material ◽  
Fly Ash ◽  
Power Plant ◽  
High Performance ◽  
Thermal Power ◽  
Recovery Process ◽  
Industrial Wastes ◽  
Raw Material ◽  
Polymerization Reaction ◽  
High Performance Composite

Given the amount of industrial waste produced and collected in the world today, a recycling and recovery process is needed. The study carried out on this subject focuses on the valorization of one of these industrial wastes, namely the fly ash produced by an ultra-supercritical coal power plant. This paper describes the use and recovery of fly ash as a high percentage reinforcement for the development of a new high-performance composite material for use in various fields. The raw material, fly ash, comes from the staged combustion of coal, which occurs in the furnace of an ultra-supercritical boiler of a coal-fired power plant. Mechanical compression, thermal conductivity, and erosion tests are used to study the mechanical, thermal, and erosion behavior of this new composite material. The mineralogical and textural analyses of samples were characterized using Scanning Electron Microscopy (SEM). SEM confirmed the formation of a new composite by a polymerization reaction. The results obtained are very remarkable, with a high Young’s modulus and a criterion of insulation, which approves the presence of a potential to be exploited in the different fields of materials. In conclusion, the composite material presented in this study has great potential for building material and could represent interesting candidates for the smart city.

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