물리화학적 분석을 통한 폐고무의 재활용 품질특성 평가

박준석,윤승준,김정대 한국폐기물자원순환학회 2013 한국폐기물자원순환학회지 Vol.30 No.8

This research was performed to evaluate the recycling characteristics by physico-chemical analysis of the wasted andthe reclaimed rubbers. Two types of the powdered and the reclaimed rubbers were sampled and analyzed. Pb was detectedin the range of 2.55~194.00mg/kg for the powdered rubber product, of which some exceeded the rubber standard criteria(90mg/kg), while it was 0.05~50.80mg/kg for the reclaimed rubber. Zn showed the highest concentration of heavymetals in the rubber products, comparing to the other heavy metals. It ranged from 9,750mg/kg to 27,900mg/kg, and388mg/kg to 17,450mg/kg for the powdered and the reclaimed rubber products, respectively. Total PAHs concentrationsof the powdered and the reclaimed rubber products exceeded greatly the rubber standard criteria (10mg/kg) as221.7~18,842.8mg/kg and not-detected~14,248.0mg/kg, respectively. Therefore, it was concluded that the managementplan and environmental criteria should be prepared for the recycled rubber product, considering the concentrations ofhazardous compounds such as Pb, Zn, and PAHs.

Effect of Whole Tire Reclaim on Physico-Mechanical and Thermal Properties of Carbon Black Filled Natural Rubber/Butadiene Rubber Composite

Vaishak Nambiathodi,Siby Varghese,Neethu Varghese 한국고분자학회 2021 폴리머 Vol.45 No.5

Combinations of natural rubber (NR), butadiene rubber (BR), and reclaim rubber (RR) were prepared with a view to producing low-cost re-treading materials. It was found that cure time and scorch time decreased with the increase in the reclaim content. Only a small reduction in the properties was observed in almost all systems upon the addition of 30 phr of reclaim rubber. Systems with good abrasion resistance and tensile strength were obtained. High tensile values of 22.8 and 20.1 MPa were able to obtain for the NR-rich system. Tear strength can be enhanced by the addition of reclaim rubber. Elongation at break was higher for all the systems even after adding 30 phr of RR. Modulus and compression set values were increased with RR loading. The thermal behavior and activation energy of NR/BR/RR blends were improved by the addition of RR. The phase morphology of the blends was studied using a scanning electron microscope.

An experimental and numerical approach in strength prediction of reclaimed rubber concrete

Williams, Kanmalai C.,Partheeban, P. Techno-Press 2018 Advances in concrete construction Vol.6 No.1

Utilization of waste tires may be considered as one of the solution to the problems faced by the local authorities in disposing them. Reclaimed rubber (RR) is being used in concrete for replacing conventional aggregates. This research work is focused on the strength prediction of reclaimed rubber concrete using a Genetic Algorithm (GA) for M40 grade of concrete and comparing it with experimental results. 1000 sets were taken and 100 iterations were run during training of GA models. A base study has been carried out in this research work partially replacing cement with three types of fillers such as Plaster of Paris (POP), Fly Ash (FA) and Silica Fume (SF). A total of 243 cubes were cast and tested for compression using a Universal Testing Machine. It was found that SF produced maximum strength in concrete and was used in the main study with reclaimed rubber. Tests were conducted on 81 cube samples with a combination of optimum SF percent and various proportions of RR replacing coarse aggregates in concrete mix. Compressive strength tests of concrete at 7, 14 and 28 days reveal that the maximum strength is obtained at 12 percent replacement of cement and 9 percent replacement of coarse aggregates respectively. Moreover the GA results were found to be in line with the experimental results obtained.

재생고무를 이용한 고점착 유연형 복합방수 시트에 대한 기초적 실험 연구

오상근,이종용,최성민 대한건축학회지회연합회 2014 대한건축학회연합논문집 Vol.16 No.6

건축 구조물의 지하에 비노출 형태로 개량 아스팔트 방수시트가 사용되고 있다. 대부분의 비노출형 개량 아스팔트 방수시트는 점착물질을 적층하여 방수시트의 물리적 성능을 개선시킨다. 하지만, 기존에 사용되는 점착물질은 건축 구조물 지하의 지하수와 토양에 인접하여 있기 때문에 환경적 오염 문제와 더불어 지하 환경의 특수한 조건을 만족시키지 못하기 때문에 방수층의 하자가 발생될 수 있다. 본 연구의 대상은 재생고무를 이용한 고점착 유연형 복합방수시트이며, 실험 방법으로는 기본물성 평가, 재료특성 평가, 환경안정성 평가를 실시하였다. 실험 결과, 기본물성 평가는 KS 품질기준보다 높은 값이 측정되었으며, 재료특성 평가는 구조물 거동대응 성능에서 부분적인 누수가 확인되었다. 그리고 환경 안정성 평가에서는 환경규제 기준에 모두 만족하는 것으로 나타났다. The highly adhesive composite waterproofing sheet is applied in non-exposed form on the underground of building. Most of the highly adhesive composite waterproofing sheet of non-exposed type are improved mechanical properties of waterproofing sheet through laminating glutinous substance. However, existing glutinous substance is would be occurred defect of waterproofing layer, because it has low quality and environmental problem. The test target is the highly adhesive composite waterproofing sheet using reclaimed rubber. and the test items are total eight items that is specified by KS F 4934 etc. As a result of test, basic physical property test were measured a experimental value more than Korean Standards. The material property test were occurred water leak on the resistance performance of structure behavior. The environmental stability test were satisfied with the environment regulation standards.

자착식 부틸고무 방수시트의 재생고무 증량 배합에 따른 물성변화 특성

최수영 ( Choi¸ Su-young ),박진상 ( Park¸ Jin-sang ),최성민 ( Choi¸ Sung-min ),권영화 ( Kwon¸ Young-hwa ),김영근 ( Kim¸ Young-keun ),오상근 ( Oh¸ Sang-keun ) 한국건축시공학회 2021 한국건축시공학회 학술발표대회 논문집 Vol.21 No.2

In this study, butyl rubber, which is the main material constituting the self-adhesive butyl rubber waterproofing sheet, was mixed with reclaimed rubber, and tensile strength, tear strength, peeling resistance strength, and adhesion strength were measured for sample prepared by mixing ratio. As a result, it was confirmed that peeling resistance strength and adhesion strength decreased as the reclaimed rubber content increased, and tensile strength and tear strength did not change significantly.

Effects of Peroxides on the Properties of Reclaimed Polypropylene/Waste Ground Rubber Tire Composites Prepared by a Twin Screw Extrusion

( Seonggil Kim ),( Minji Lee ),( Hyeongsu Lee ),( Hobin Jeong ),( Yuri Park ),( Kwang Hwan Jhee ),( Daesuk Bang ) 한국고무학회 2016 엘라스토머 및 콤포지트 Vol.51 No.1

In this study, the reclaimed polypropylene (RPP) and waste ground rubber tire (WGRT) were used to simulate the thermoplastic vulcanizate (TPV) for cost reduction and resources recycling. Also, we examined the effects of dicumyl peroxide (DCP) and 2,5-dimethyl-2,5-di-(tert-butylperoxy)-hexane (DTBPH) as peroxide type cross-linking agents to enhance the properties of TPV`s. The components of RPP and WGRT were fixed at 30 and 70 wt%, and DCP and DTBPH were added in the concentrations from 0.5 to 1.5 phr, respectively. RPP/WGRT composites with different contents of DCP and DTBPH were prepared by a modular intermeshing co-rotating twin screw extruder. The Young`s modulus of composites were decreased with increasing peroxides contents. On the other hand, tensile strength, elongation at break, and impact strength of the composites were increased with peroxide contents. We also confirmed that interfacial adhesion between RPP and WGRT was considerably improved by adding the peroxides. Taken together, DTBPH added RPP/WGRT composites exhibited better mechanical properties rather than those of DCP added composites.

고분자 재생기술 폐고무 재생 기술 현황

이준엽 ( Jun Yeob Lee ) 한국공업화학회 2007 공업화학전망 Vol.10 No.3

The effect of gamma irradiation on mechanical, thermal and morphological properties of glass fiber reinforced polyethylene waste/ reclaim rubber composites

Medhat M. Hassan,Raouf O. Aly,Jehan A. Hasanen,El Sayed F. El Sayed 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.3

Composites of waste polyethylene (WPE), collected from municipal solid waste/recycled waste rubberpowder (RWRP) reactive compatibilizing agent, maleic anhydride (MA) and glass fiber (GF) up to 20 wt%,prepared by melting and irradiated with gamma-rays up to 150 kGy have been studied. Tensile strength(TS), elongation at break (Eb), elastic modulus, hardness, thermal and morphological parameters of theirradiated composites were investigated. The examined mechanical properties have been found toimprove largely with filler content. Interesting Eb behavior has been detected for the irradiatedcomposites loaded up to ~10 wt% GF and has been basically discussed in view of matrix crystallinity andmorphology. TGA thermograms of unirradiated composites revealed enhanced thermal stability thanthat reported for the blend whereas comparatively slight improvement has been demonstrated byirradiation. Whereby insignificant alteration in Tm values was observed by loading or irradiation, yetDHm maximum of 3.41 J/g, indicated for the 5 wt% GF irradiated composite with an integral dose of75 kGy, emphasizes the influence of the relatively moderate load and dose levels on matrix stability. Thephenomenon has been confirmed by the respective SEM micrographs.