• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2001년도 The 6th International Symposium of East Asian Resources Recycling Technology
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• pp.59-64
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• 2001

On July 5, 1997, environmental Protection Administration of Taiwan publicized the recycling regulation of waste home appliances that include four items, namely, television, refrigerator, washing machine, and air conditioner. It is believed that this regulation pioneers the law enforcement of waste home appliances in the world. To comply with tile policy, several contemporary waste disposal plants specialized in waste home appliances were established according to a follow-up technical specification oil the waste treatment facilities and methodology. Therefore, the traditional dismantling facilities were substituted and waste collection routes were altered as well accordingly. This study investigates the collection and recycling costs of waste home appliances in accordance with these newly established routes and facilities, respectively. Cost survey was conducted among collectors and recycling plants of waste home appliances; consequently, tire collection and recycling costs were analyzed, correspondingly. Results show that the recycling costs of waste home appliances were much higher than that of other waste items. Since the market share of recycled materials is lacking, these waste recycling plants of home appliances can only survive under the subsidy of EPA in Taiwan. Due to some arduous problems, the subsidiary system has already caused serious financial unbalance for a foundation under EPA of Taiwan, which associated with waste recycling in Taiwan.

• 청정기술
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• 제5권1호
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• pp.42-48
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• 1999

폐타이어는 환경 문제와 관련하여 오염과 재활용의 양면성을 지니고 있다. 이와 같은 폐타이어를 재활용의 측면에서 고온의 열플라즈마를 이용하여 열분해하여 가연성 가스로의 전환을 시도하였다. 폐타이어를 산소가 배제된 상태에서 열분해하여 $CH_4$, $C_2H_2$, $C_4H_{10}$등과 같은 저분자량의 탄화수소가 주성분인 가연성 가스가 다량 발생함을 GC를 이용하여 확인할 수 있었다. 타이어의 공급량이 증가할수록 가연성 가스의 구성에서 $CH_4$의 비율이 증가하였으며, 플라즈마 전력이 증가할수록 $C_2H_2$가 증가함을 확인하였다. 발생가스는 $C_4H_{10}$ 또는 $C_2H_2$등의 탄화수소가 주를 이루었으며 그 비율은 70%이상이었다. 한편 char의 온도에 따른 질량 감소 경향을 TG로 분석하여 열플라즈마 내에서 타이어의 열분해 경향을 간접적으로 유추할 수 있었다.

• Elastomers and Composites
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• 제51권1호
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• pp.17-23
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• 2016

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.

• 대한화학회지
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• 제61권6호
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• pp.339-345
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• 2017

자동차 폐타이어 분말(WTP)을 질소분위기 하에서 2시간 동안 $400^{\circ}C$의 온도에서 열처리하여 탄소질 흡착제(CA-WTP)로 만들고, 이들에 대한 열 중량 분석, 에너지 변환 X-선 분석, 주사전자 현미경, 비표면적 측정, 적외선 분광기들을 통해 특성을 파악한 후, 수중의 Cd의 제거를 위한 흡착제로서 시험하였다. 열처리한 CA-WTP는 WTP보다도 매우 높은 비표면적과 총 세공부피 그리고 Cd에 대해 높은 흡착효율을 나타내었다. 흡착의 평형 데이터는 Freundlich와 Langmuir 흡착 등온선 모델을 이용하여 평가하였고, 위 두 흡착 등온선 모두 0.95보다 큰 상관계수($R^2$) 값을 나타내었다. 연구의 결과는 열처리 한 폐타이어 분말(CA-WTP)이 수중으로부터 Cd을 흡착하는데 효율적인 흡착제로 사용될 수 있다는 것을 보였다.

• 자원리싸이클링
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• 제22권2호
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• pp.11-17
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• 2013

폐타이어를 열분해하여 오일을 회수하는 공정에서 배출되는 다량의 탄소 잔류물을 활용하는 기술은 환경과 경제성 측면에서 매우 중요하다. 본 연구에서는 폐타이어 열분해 과정에서 배출되는 탄소 잔류물을 활용하여 활성탄으로 재활용이 가능한지 파악하고자 하였다. 이를 위해서 폐타이어 열분해 상용화 공정에서 발생하는 탄소 잔류물의 특성을 분석하였다. 아울러 탄소 잔류물을 $600^{\circ}C$와 $800^{\circ}C$에서 1시간 탄화 한 후, $950^{\circ}C$에서 3시간 활성화하여 기공특성 변화를 살펴보았다. 탄소잔류물의 비표면적은 $8.0m^2/g$이었으나, 탄화와 활성화 과정을 거치면서 비표면적이 $548.3m^2/g$로 급격히 증가함을 확인할 수 있었다.

• Steel and Composite Structures
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• 제48권1호
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• pp.43-57
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• 2023

The impacts of waste tire rubber (WTR) on the bending conduct of reinforced concrete beams (RCBs) are investigated in visualization of experimental tests and 3D finite element model (FEM) using both ANSYS and SAP2000. Several WTR rates are used in total 4 various full scale RCBs to observe the impact of WTR rate on the rupture and bending conduct of RCBs. For this purpose, the volumetric ratios (Vf) of WTR were chosen to change to 0%, 2.5%, 5% and 7.5% in the whole concrete. In relation to experimental test consequences, bending and rupture behaviors of the RCBs are observed. The best performance among the beams was observed in the beams with 2.5% WTR. Furthermore, as stated by test consequences, it is noticed that while WTR rate in the RCBs is improved, max. bending in the RCBs rises. For test consequences, it is clearly recognized as WTR rate in the RCB mixture is improved from 0% to 2.5%, deformation value in the RCB remarkably rises from 3.89 cm to 7.69 cm. This consequence is markedly recognized that WTR rates have a favorable result on deformation values in the RCBs. Furthermore, experimental tests are compared to 3D FEM consequences via using ANSYS software. In the ANSYS, special element types are formed and nonlinear multilinear misses plasticity material model and bilinear misses plasticity material model are chosen for concrete and compression and tension elements. As a consequence, it is noticed that each WTR rates in the RCBs mixture have dissimilar bending and rupture impacts on the RCBs. Then, to observe the impacts of WTR rate on the constructions under near-fault ground motions, a reinforced-concrete building was modelled via using SAP2000 software using 3-D model of the construction to complete nonlinear static analysis. Beam, column, steel haunch elements are modeled as nonlinear frame elements. Consequently, the seismic impacts of WTR rate on the lateral motions of each floor are obviously investigated particularly. Considering reduction in weight of structure and capacity of the members with using waste tire rubber, 2.5% of WTR resulted in the best performance while the construction is subjected to near fault earthquakes. Moreover, it is noticeably recognized that WTR rate has opposing influences on the seismic displacement behavior of the RC constructions.

• 대한토목학회논문집
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• 제32권6C호
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• pp.259-265
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• 2012

본 논문에서는 경량화 재료인 기포를 혼합한 기포혼합경량토와 폐타이어 분말을 혼합한 타이어혼합경량토를 연약지반의 개량, 진동차폐재 및 교대의 뒷채움재 등으로 활용하기 위하여 공학적 특성을 조사하였다. 당 연구에서는 목표 습윤단위중량과 시멘트 혼합비 변화에 따른 기포혼합경량토와 타이어혼합경량토의 강도특성과 변형특성을 일축압축시험과 비압밀-비배수 삼축압축시험으로 분석하였다. 동일한 습윤단위중량($13kN/m^3$)에서 2종류의 경량혼합토 강도특성을 비교한 결과, 일축압축시험에서는 같은 조건에서 비슷한 압축강도특성를 보였으나 비압밀-비배수 삼축압축시험 결과에서는 타이어 분말의 탄성특성으로 인한 영향으로 타이어혼합경량토가 기포혼합경량토 보다 큰 압축강도를 보였다. 그리고 2종류의 경량혼합토는 습윤단위중량과 시멘트량의 증가에 따라 일축압축강도와 삼축압축강도가 증가하였으나 습윤단위중량 $11kN/m^3$ 이하의 기포혼합경량토는 일정한 기포혼합비 수준에서는 시멘트량이 증가해도 기포에 의한 간극의 영향으로 경량혼합토의 강도는 증가하지 않거나 저하되는 것으로 나타났다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1996년도 가을 학술발표회 논문집
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• pp.37-43
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• 1996

The high Temperatures and long residence times in the combustion zones of cement kiln can use to burn liquid and solid wastes, such as fuel-wastes, sludges and tire-wastes. To the lastest time, treatment methods of industrial waste are incineration treatment, ocean dumping and land dumping. These are the main methods, but all of them may cause vatious kinds of secondary pollution, including air pollution and water pollution. From this point of view, to reuse the Reclaiming-Fuel in Cement Kiln is the most outstanding waste treatment plant in the world and dose not cause any pollution at all.

• Elastomers and Composites
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• 제36권1호
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• pp.3-13
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• 2001

마찰재로써 석면사용에 따른 환경문제를 해결하고, 폐타이어의 고부가 가치화를 위하여, 폐타이어분말과 육티탄산칼륨을 주원료로 하고, 여기에 충전제, 마찰안정제 등을 혼입, 가공하여 고무가 연속상인 새로운 형태의 마찰재를 제조하였다. 이 마찰재들에 대한 마찰.마모시험결과에 의하면 육티탄산칼륨, 페놀, 마찰안정제, 황산바륨을 각각 5, 20, 10, 20 phr로 첨가시킨 마찰재가 브레이크로 사용하기에 적합한 마찰특성, 즉 높고 안정된 마찰계수와 낮은 마모율을 보여주었다.

• Computers and Concrete
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• 제18권1호
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• pp.1-16
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• 2016

In this study, an Artificial Neural Network (ANN) and Adaptive Network-based Fuzzy Inference Systems (ANFIS) prediction models for flexural strength of the cement mortars have been developed. For purpose of constructing this models, 12 different mixes with 144 specimens of the 2, 7, 28 and 90 days flexural strength experimental results of cement mortars containing pure Portland cement (PC), blast furnace slag (BFS), waste tire rubber powder (WTRP) and BFS+WTRP used in training and testing for ANN and ANFIS were gathered from the standard cement tests. The data used in the ANN and ANFIS models are arranged in a format of four input parameters that cover the Portland cement, BFS, WTRP and age of samples and an output parameter which is flexural strength of cement mortars. The ANN and ANFIS models have produced notable excellent outputs with higher coefficients of determination of $R^2$, RMS and MAPE. For the testing of dataset, the $R^2$, RMS and MAPE values for the ANN model were 0.9892, 0.1715 and 0.0212, respectively. Furthermore, the $R^2$, RMS and MAPE values for the ANFIS model were 0.9831, 0.1947 and 0.0270, respectively. As a result, in the models, the training and testing results indicated that experimental data can be estimated to a superior close extent by the ANN and ANFIS models.