경상분지(慶尙盆地) 언양단층(彦陽斷層) 지역(地域)에 대(對)한 전기비저항(電氣比抵抗) 탐사연구(探査硏究)

김인수,김종열,Kim, In-Soo,Kim, Jong-Yeol 대한자원환경지질학회 1983 자원환경지질 Vol.16 No.1

Gyeongsang Basin in the southeastern part of the Korean peninsular is characterized by many fault systems. To decipher the geotectonical evolution of the Korean peninsular and marginal basins in her adjacent areas it is prerequisite to understand the spatial distribution pattern and mutual relationships of these fault systems. Because of difficulties in finding any criterion to recognize the faults in field, their extension and mutual relationships in ages are not very clear yet. As an attempt to find geophysical criteria to recognize the fault, geoelectrical resistivity survey was carried out in this study. With the Wenner configuration four resistivity soundings and twenty seven resistivity profilings were done. The electrode distance used was up to 50m. From the results of the resistivity soundings and boring data of earlier groundwater investigations the depth of alluvial and weathered zone was established to be at most 20m in the study area. In the resistivity profiling low resistivity anomaly zones are detected on every traverse, which are interpreted as caused by fractures, fault clays and mylonites in the fault zone. The width of the fault zone amounts to 0.3-1km. By correlating and connecting the negative anomaly zones from traverse to traverse one can determine the trend of th of the faultzone and therefore that of fault itself. The recognized fault trend in this way was $N15^{\circ}-20^{\circ}E$ and this coincides with the direction of the inferred fault line from earlier geological surface mapping. With the help of this characteristical negative anomaly the existance of another $N80^{\circ}W$ trending fault was estabished. This study has shown that geoelectrical resistivity survey can be applied successfully to the problem of tracing fault line insofar as a fault zone has been developed along fault line.

관상동맥 약물 방출 스텐트 삽입 후 스텐트 골절에 대한 임상결과 및 예후

김인수(In Soo Kim),한재복(Jae Bok Han),장성주(Seong Joo Jang) 대한방사선과학회(구 대한방사선기술학회) 2014 방사선기술과학 Vol.37 No.2

본 연구에서는 관상동맥 중재술로 관상동맥 약물방출 스텐트(drug-eluting stent, DES) 삽입 후 스텐트 골절에 대한 임상적 특성, 결과 및 예후에 대하여 연구하였다. 약물방출 스텐트 시술을 받고 추적 관상동맥조영술을 실시한 4,701명 환자에서 스텐트 골절이 발생한 환자는 32명(남:여=19:13, 평균연령 62.44±9.8세, 0.68%)이었다. DES의 종류별 스텐트 골절의 빈도는 SES(sirolimus- eluting stents) 19(59.4%), PES(paclitaxel-eluting stents) 9명(28.1%), BES(biolimus A9-eluting stents) 2명(6.3%), EES(everolimus-eluting stents) 1명(3.1%), EPC(endothelial progenitor cell capture stent) 1명(3.1%), ZES(zotarolimus-eluting stents) 0명(0%) 이었다. 표적 병변은 우관상동맥 13명(40.6%) 좌전하행지 16명(50.0%), 좌회선지 3명(9.4%)이었다. 각 혈관의 병변 형태는 복잡병변인 B2, C형이 25명(69.4%)이었다. 스텐트 골절 환자 중 스텐트 내 협착은 17명(53.1%)이었으며, 스텐트 골절 병변에 대한 치료는 내과적 관찰 16명(50.0%), 동종의 관상동맥 DES 시술 3명(9.4%), 이종의 관상동맥 DES 시술 10명(31.3%), 관상동맥 풍선 확장술 3명(9.4%)이었다. 추적검사에서는 32.9±12.4개월 동안 스텐트 골절로 인한 사망을 포함한 심장사는 발생하지 않았다. 결론적으로 관상동맥 중재술로 관상동맥 DES를 시술받은 추적관찰 대상 환자에서 3.7년 추적관찰 기간동안 스텐트 골절 발생률은 0.68%로 나타났으며, PES보다 SES에서 많은 발생 빈도를 보였다. 좌전하행지와 복잡병변에 대한 시술 후 스텐트 골절이 많이 발생하였다. 또한 스텐트 골절 정도와 협착 병변이 중대한 경우에만 관상동맥 중재술을 실시하였으며, 추적관찰 기간 중 스텐트 골절이 있는 환자는 병용 항혈소판 요법을 지속적으로 투여하였다. 특히 사망을 포함한 주요 심장사건에 관련하여 스텐트 골절과 연관된 심장사의 발생률은 매우 낮은 것으로 나타났다. 본 연구를 통해서 스텐트가 가지고 있는 특성 스텐트 디자인이 폐쇄형(closed cell) 디자인 SES에서 발생 빈도가 높음을 제시함으로써 스텐트 개발에 도움이 될 거라 판단된다. Many studies have suggested that in the era of Drug-Eluting Stents(DES) are one of the causes of In-Stent Restenosis(ISR) of Stent Fracture(SF). The present study sought to evaluate clinical characteristics of patients with stent fracture after successful DES implantation. The 4,701 patients were selected for analysis who underwent a follow-up coronary angiography irre-spective of ischemic symptoms. The overall incidence of SF was 32 patients(male:female=19:13, Av. age 62.44±9.8year, 0.68%). Fractures of Sirolimus-Eluting Stents(SES), Paclitaxel-Eluting Stents(PES), Biolimus A9-Eluting Stents(BES), Everolimus-Eluting Etents(EES), Endothelial Progenitor Cell Capture Stent(EPC) and Zotarolimus-Eluting Stents(ZES) are accounted for 19(59.4%), 9(28.1%),2(6.3%),1(3.1%),1(3.1%)and 0(0%) respectively. SF developed in the left Anterior Dscending(LAD) artery in 16 patients(50%) and in complex(type B2, C) lesions in 25 patients(69.4%). Ten patients were treated with heterogenous DES, the rest being treated with either homogenous DES(3 patients), plain old balloon angioplasty(3 patients), or conservative medical treatment(17 patients). None of the patients with SF suffered from cardiac death dur-ing a follow-up period of 32.9±12.4 months. The overall rate of DES fracture over up to 3.7 years of follow-up was 0.68% with higher incidence in SES than in PES. SF frequently occurred in the LAD artery and in complex lesions. Of the patients with SF, coronary intervention was performed only when the binary restenosis lesion was significant. During the follow-up, patients with SF have continued on combination antiplatelet therapy. There is a very low rate of major adverse cardiac events(post-detection of SF), especially cardiac death associated with SF.

경상분지 남서부 진교-사천 지역 전기백악기 퇴적암에 대한 고자기 연구

김인수,강희철,이현구,Kim, In-Soo,Kang, Hee-Cheol,Lee, Hyun Koo 대한자원환경지질학회 1993 자원환경지질 Vol.26 No.4

A total of 264 independently oriented core samples were collected from 26 sites in the southwestern part (the Naktong Trough) of the Cretaceous $Ky{\check{o}}ngsang$ Basin in south Korea. The sampled formations comprise the sedimentary Shindong and the Hayang Groups of the Lower Cretaceous age. Alternating field and thermal demagnetizations were conducted. Characteristic remanent magnetization (ChRM) was relatively easily isolated in each formation except in the Chinju formation, from which only remagnetization circles were observed. Even though an extensive use of the fold test was not possible due to the nearly homoclinal nature of the strata in the area, we believe that the ChRM of each formation is of primary origin based on the following grounds: The in-situ ChRM direction of each formation is different from the present geomagnetic field direction. Fisherian precision parameter becomes enhanced through the tilt correction in all formations, closely to the values required for a positive fold test. Three out of the five studied formations pass the reversal test. The mean palaeomagnetic pole position from the studied area is found to be statistically different from the contemporary pole from the Chinese block exclusive of the Shandong area. The difference in magnetic declination suggests a $14.5^{\circ}$ (${\pm}10.5^{\circ}$) clockwise rotation of the studied area relative to the Chinese block comprising the west of the Tan-Lu fault. On the other hand, any significant difference in magnetic inclination and concurrent palaeolatitude is not observed between the studied area and China as well as the other area (Taegu-Andong area) in the $Ky{\check{o}}ngsang$ Basin. The dual nature of the magnetic polarity confirmed in all formations suggests an older than 124 Ma (Neocomian or older) age of the studied sedimentary strata.

약물방출 관상동맥 스텐트 시술 후 스텐트 혈전증 발생 환자의 임상경과

김인수(In-Soo Kim),정명호(Myoung-Ho Jeong),한재복(Jae-Bok Han),장영일(Young Ill Jang),장성주(Seong-Joo Jang) 한국콘텐츠학회 2013 한국콘텐츠학회논문지 Vol.13 No.12

약물방출 스텐트 (drug-eluting stents, DES)는 일반금속 스텐트에 비하여 재협착을 현저하게 줄었지만, DES의 구조적인 특성으로 인한 스텐트 혈전증 (stent thrombosis, ST)이 증가한다고 알려져 있다. 혈전증 유형의 정의는 Early ST ; (EST)은 30일 이내, Late ST ; (LST)은 31일 이상에서 1년 이내 그리고 Very late ST ; (VLST)은 1년 이상으로 분류 하였다. 스텐트 세대별 (시장 출시와 스텐트 디자인, Polymer 향상에 따른) ST발생빈도, 임상 양상 및 예후를 알아보았다. 2003년 6월부터 2013년 6월까지의 전남대학교병원 심혈관센터에서 경피적 관상동맥 중재술을 시행 받은 10,273명 중 ST 발생은 134명(1.30%) 이었다. 세대별 발생빈도는 1세대에서 81명 (0.79%)으로 높았으며, 세대별 ST 유형은 1세대에서는 VLST의 발생률이 높았고 (p=0.002), 2세대에서는 EST와 LST의 발생률이 높았지만 (p=0.025), 3세대에서는 유의한 차이가 없었다(p=0.278). ST로 인하여 사망한 14명은 EST 10명 (18.2%), LST 2명(8.3%), VLST 2명 (3.6%)로서 EST에서 사망률이 높았다 (p=0.042). DES 시술 후 발생하는 ST는 1.3%이였고, VLST는 1세대 스텐트에서 많았으며, 입원 중 사망률은 EST에서 높았다. Stent thrombosis after successful drug-eluting stent(DES) implantation has been reported in around 1% of patients in clinical trials. However, the increased risk of ST associated with DES remains a matter of concern. From 1 June 2003 to 30 June 2013, we investigated clinical characteristics, in-hospital outcomes in 10,273 patients who underwent percutaneous coronary intervention in the Heart Center of CNUH. Overall incidence of ST was 1.30% (134 patients). The incidence of ST according to the stent generations and the timing of ST (n= total, early vs. late vs. very late) were 0.79% (n =81, 26 vs. 12 vs. 43) in first-generation, 0.38% (n=39, 21 vs. 9 vs. 9) in second-generation and 0.14% (n=14, 8 vs 3 vs. 3) in third-generation, (p=0.70). The mortality from ST was significantly higher in early ST group compared to the late and very late ST groups (18.2% vs. 8.3% vs. 3.6%, p=0.042). Overall incidence of ST after DES implantation was 1.30% (134 patients). The in-hospital mortality was significantly higher in early ST group compared to the late and very late ST groups.

경주-울산일원에 대한 지역지질 특성연구 : 울산단층주변 화강암류의 잔류자기와 대자율

김인수,손문,정현정,이준동,김정진,백인성,Kim, In-Soo,Son, Moon,Jung, Hyun-Jung,Lee, Joon-Dong,Kim, Jeong-Jin,Paik, In Sung 대한자원환경지질학회 1998 자원환경지질 Vol.31 No.1

A total of 469 granitic samples were collected from 44 sites in the Ulsan fault area, southeast Korea. According to the previous petrographic studies, the granitic rocks have been divided into four groups (Hornblende biotite granodiorite, Hornblende granite, Biotite granite and Alkali-feldspar granite). NRM intensities, values of low field magnetic susceptibility, and magnetic behaviors during stepwise demagnetization experiments suggest rather a three-fold classification: In this scheme, Hornblende granite and Biotite granite are grouped together, as they did not show any significant differences in magnetic characteristics. Based on the Ishihara (1979)'s criterion, Alkali-feldspar granite is classified as ilmenite-series granite, whereas others are classified as magnetite-series granite. In the eastern part of the study area including the Tertiary basin area, declinations of site-mean characteristic remanent magnetizations (ChRMs) show clockwise deflection of more than 30 from the reference direction of east Asia. Both along and in the adjacent region of the Ulsan fault-line, however, no deflection of remanent direction was observed. A boundary line between the deflected and undeflected site-mean ChRMs is defined in this study, which runs roughly parallel to the Ulsan fault-line at the distance of about 6km eastward from the fault-line. We suggest that this newly found boundary line, which we call Yonil tectonic line, released dextral simple shear stress acted in the southeastern part of the Korean peninsula during the opening stage of the East Sea in the Early Cenozoic.

Photoreflectance 측정에 의한 InxGa₁-xAs(0.03≤X≤0.11) 에피층의 특성 연구

김인수(In-Soo Kim),손정식(Jeoog-Sik Son),이철욱(Cheul-Wook Lee),배인호(In-Ho Bae),임재영(Jae-Youog Leem),한병국(Byung-Kuk Han),신영남(Young-Nam Shin) 한국진공학회(ASCT) 1998 Applied Science and Convergence Technology Vol.7 No.4

Molecular Beam Epitaxy(MBE)법으로 성장된 In_xGa_(1-x)As/GaAs 에피층에 대해 photoreflectance (PR)실험을 통해 특성을 조사하였다. PR 측정결과 성장된 In_xGa_(1-x)As 에피층의 띠간격 에너지(E。) 신호가 시료의 변형(strain)에 의해 heavy-hole(E。(HH))과 light-hole(E。(LH))로 분리되어 관측되었다. 에피층의 조성과 변형은 각각 시료에서의 E。(HH) 및 Eo(HH)와 Eo(LH)신호의 에너지 차이를 이용하여 구하였다. 또 160 K이하의 온도에서는 Eo(LH)의 신호가 사라짐을 볼 수 있었다. Franz-Keldysh oscillation(FKO) 피크로부터 계산되어진 InGaAs/GaAs 계면전장 (E)은 In 조성의 증가에 따라 0.75×10^5 V/㎝에서 2.66×10^5 V/㎝로 증가하였다. In 조성이 x=0.09인 시료에 대한 PR신호의 온도의존성 실험에서 Varshni 계수와 Bose-Einstein 계수들을 각각 구하였다. Photoreflectance (PR) measurents have been performed on In_xGa_(1-x)As/GaAs grown by molecular beam epitaxy (MBE). Bandgap (E。) of In_xGa_(1-x)As epilayer measured from PR was separated as heavy-hole (E。(HH)) and light-hole (E。(LH)) by strain effect. The compositions and the strains of epilayer were obtained from the energy value of E。(HH) and from enegy difference of E。(HH) and E。(LH), respectively. In addition, the PR signal of E。(LH) was diminished below 160 K. The interface electric field (E) of InGaAs/GaAs was increased from 0.75×10^5 V/㎝ to 2.66×10^5 V/㎝ as In composition increased, which was calculated from Franz-Keldysh oscillation (FKO) peaks. As the temperature dependence of the PR signal at x=0.09 sample, we obtained Varshni and Bose-Einstein coefficients.

총력전기 식민지 조선의 사회과학 비판

김인수(Kim, In-Soo) 고려대학교 아세아문제연구소 2013 亞細亞硏究 Vol.56 No.4

Since the mid-1930s, intellectuals of colonial Korea had become professionals of social science academics. In this paper, I tracked the whereabouts of this professional knowledge in total war period. After political conversion(1938), In Jeongsik(印貞植) obtained and produced by himself the data which were more detailed and accurate than before for the society of colonial Korea. Using these indexes, In defined the historical status of it. At the same time, he compared colonial Korea with Southeast Asia, China, and Manchuria. Firstly, In argued that capitalistic industrialization was advanced in colonial Korea under Japanese imperialism, on the contrary, feudalism had been exacerbated in Southeast Asia since colonization by Western imperialism. Secondly, he represented China as a stagnant society based on the theory of "Asiatic mode of production"(K. Wittfogel), excepting colonial Korea from the range of that theory. Finally, In argued that Korean society was modernized based on the fact that the system of nuclear family was overwhelming, in contrast to Manchuria which had been evaluated as a large family system society. However, In"s claims were the answers to the questions suggested from Japanese resident intellectuals in Korea. These questions, produced in the asymmetry of power between empire and colony, were to serve the purpose of Japanese imperialism to mobilize colonial Korean society. In, without denying these questions, only looked to the others, neighboring Asian states, which were evaluated inferior than Korea by himself. After all, In neither could recognize accurately the "colonial Korea", nor fairly neighboring others. Disregarding the violence of questions he tried to answer, In distorted the history and reality of others. The way that In Jeongsik walked on as a social scientist of colonial Korea, needs to be remembered as the typical case that clearly says why colonial intellectuals fail to know their society and others accurately.

약물용출 스텐트를 이용한 관상동맥중재술 후 재협착의 독립적 예측인자에 관한 연구

김인수(In-Soo Kim)한재복(Jae-Bok Han),장성주(Seong-Joo Jang),장영일(Young-Ill Jang) 대한방사선과학회(구 대한방사선기술학회) 2010 방사선기술과학 Vol.33 No.1

본 연구에서는 약물용출성 스텐트 삽입 후 재협착에 관한 독립적 인자를 확인하고 MDCT로 측정된 calcium score가 재협착 발생의 예측인자로써 가능성을 알아보고자 하였다. 2006년 5월부터 2009년 5월까지 전남대학교병원에서 MDCT상 관상동맥 협착이 발견되어 약물 용출 스텐트를 삽입 받은 환자 1,131명 중 추적검사로 관상동맥조영술을 시행되었던 178명(남자 159명, 여자 19명, 평균 연령 61.7, 연령분포 51~71세), 190개소 병변을 대상으로 하였으며 재협착 여부에 따라 두 군(비협착군 133병변, 재협착군 57병변)으로 나누어 비교 ․ 분석하였다. 그 결과 임상진단명은 진구성 심근경색이 비협착군 3예(2.3%), 재협착군 5예(8.8%)로 유의한 차이가 있었으며(p = 0.040), 급성 심근경색증, 불안정 협심증, 안정 협심증의 유병률은 차이가 없었다. 관상동맥 조영술 소견에서 병변 혈관의 위치는 재협착군에서 좌주간지 병변이 더 많았다(0.8% vs. 5.3%, p = 0.047). 스텐트 직경은 재협착군에서 유의하게 작았으며(3.3±0.4 mm vs. 3.1±0.3 mm, p = 0.004), 스텐트 길이는 양군 간에 차이가 없었다. 관상동맥 조영술 상 혈관의 초기 협착 정도는 재협착군에서 더 심했으며(86.1±11.4% vs. 91.5±9.2%, p = 0.001), 복잡 병변(B2/C형)은 양 군간에 차이가 없었다. 연령은 재협착군에서 더 높았고(60.2±9.9세 vs. 65.8±9.0세, p = 0.0001), 흡연력과 고지혈증은 비협착군에서(42.1% vs. 19.3%, p = 0.003, 23.3% vs. 8.8%, p = 0.019), 그리고 당뇨병은 재협착군에서 많았다(21.8% vs. 52.6%, p = 0.0001). 심초음파로 측정한 좌심실 구혈률은 양 군 간에 유의한 차이는 없었다. 전체 MDCT coronary artery calcium scoring는 비협착군 371.2±500.8, 재협착군 389.3±458.3로 차이가 없었고, 목표혈관과 좌주간지, 좌전하행지, 좌회선지 및 우관상동맥 각각의 calcium score 역시 양군 간 차이가 없었다. 다 변량 로지스틱 회귀분석에서 좌주간지병변(OR = 168.0, 95% CI = 7.83-3,604.3, p = 0.001), 남성(OR = 36.5, 95% CI = 5.89-2,226.9, p = 0.0001), 당뇨병의 존재(OR = 2.62, 95% CI = 1.071~6.450, p = 0.035)가 약물용출성 스텐트 삽입 후 재협착 발생에 대한 독립적인 예측인자이었다. 따라서 관상동맥 협착에 대해 약물용출 스텐트를 삽입 받은 환자에서 스텐트 내 재협착의 발생은 좌주간지병변, 남성, 당뇨병의 존재와 관련이 있었으나, MDCT로 측정된 calcium score는 재협착 발생에 대한 독립적인 예측인자로써 기능은 없었다. We sought to confirm an independent factor about in-stent restenosis (ISR) in the patients who underwent drug-eluting stent (DES) and know a possibility as a predictor of measured coronary artery calcium score by MDCT. A total of 178 patients (159 men, 61.7±10.0 years of age) with 190 coronary artery lesions were included in this study out of 1,131 patients who underwent percutaneous coronary intervention (PCI) with DES implantation for significant stenosis on MDCT at Chonnam National University Hospital between May 2006 and May 2009. All lesions were divided into two groups with the presence of ISR : group I (re ISR, N = 57) and group II (no ISR, N = 133). Compared to group II, group I was more likely to be older (65.8±9.0 vs. 60.2±9.9 years, p = 0.0001), diabetic (21.8% vs. 52.6%, p = 0.0001), have old myocardial infarction (8.8% vs. 2.3%, p = 0.040), left main stem disease (5.3% vs. 0.8%, p = 0.047), and smaller stent size (3.1±0.3 mm vs. 3.3±0.4 mm, p = 0.004). Group II was more likely to be smokers (19.3% vs. 42.1%, p = 0.003), have dyslipidemia (8.8% vs. 23.3%, p = 0.019). Left ventricular ejection fraction, lesion complexity, and stent length were not different between the two groups. Total CAC score was 389.3±458.3 in group I and 371.2±500.8 in group II (p = 0.185). No statistical difference was observed between the groups in CAC score in the culprit vessel, left main stem, left anterior descending artery, left circumflex artery, and right coronary artery. On multivariate logistic regression analysis, left main stem disease (OR = 168.0, 95% CI = 7.83-3,604.3, p = 0.001), male sex (OR = 36.5, 95% CI = 5.89-2,226.9, p = 0.0001), and the presence of diabetes (OR = 2.62, 95% CI = 1.071-6.450, p = 0.035) were independent predictors of ISR after DES implantation. In patients who underwent DES implantation for significant coronary stenosis on MDCT, ISR was associated with left main stem disease, male sex, and the presence of diabetes. However, CAC score by MDCT was not a predictor of ISR in this study population.

옥천대에 대한 고자기 연구 : 태백지역에서의 대자율 비등방성과 지구조적 응력장

김성욱,최은경,정연규,김인수,Kim, Sung-Wook,Choi, Eun-Kyeong,Jung, Yeon-Kyu,Kim, In-Soo 대한자원환경지질학회 1997 자원환경지질 Vol.30 No.6

A study of anisotropy of magnetic susceptibility (AMS) was conducted on the Ordovician-Eocene strata in the Taebaek area. The study area is a northeastern part of the Okchon belt, sometimes called as Paegunsan Synclinal Area. A total of 600 independently oriented samples were collected from 60 sites covering the whole area. With a few exception of late Cretaceous-Eocene volcanic rocks, all the sampled strata are nonmetamorphosed sedimentary rocks, mainly sandstones. Among the 60 sites, 5 sites showed flow lineation lying on the bedding plane, 11 sites showed load foliation parallel to the bedding plane, and 21 sites showed tectonic foliation unrelated to the bedding plane. The tectonic foliations are defined by $k_1-k_2$ ($k_{max}-k_{int}$) anisotropy plane, and are considered as a result of tectonic forces acted perpendicularly to the foliation plane in the geologic past. Regardless of sample-site locations, tectonic force directions defined by $k_3$ ($k_{min}$) axis perpendicular to the tectonic foliation are consistent among the strata of the same geologic age. In the course of geologic time, however, the tectonic force directions showed a clockwise rotation: approximately E-W in the Ordovician sites, NW-SE in the Permian sites, N-S in the Triassic sites, and lastly NE-SW in the late Cretaceous-Eocene sites. The pre-Permian directions showed better clustering in the in-situ (geographic) coordinates, while the younger directions become better clustered after the bedding-tilt correction. It is interpreted that the major tectonic structures of the Taebaek area were controlled by the above-mentioned tectonic forces: The Paegunsan Syncline and the Hambaeksan Fault must have been generated by the NW-SE force of late Permian-early Triassic time. It was then reactivated in the reverse (dextral) sense by the N-S force of Triassic time. The Osipchon Fault in the eastern part of the study area was either generated or reactivated by the NE-SW force of late Cretaceous-Eocene time. The Permo-Triassic NW-SE force should be an expression of the Songnim Disturbance in the Korean peninsula, which is in turn related with the SCB/NCB collision in China.

재생 아스팔트 포장의 공용성능 연구

김인수,서영찬,Kim, In-Soo,Suh, Young-Chan 한국건설순환자원학회 2011 한국건설순환자원학회지 Vol.6 No.2

환경에 관련된 인식이 급격하게 변화되는 현재의 흐름에 따라 도로포장부문에서 별다른 주목을 받지 못하던 재생아스팔트포장에 관한 실제 성능 및 적용성을 알아보고자 실내실험, 현장 시공 및 공용성능에 대한 추적조사를 실시하였습니다. 문헌고찰을 통하여 재생아스팔트포장의 현장적용에 대한 정보를 수집하였고 실제 생산현장과 접촉하여 시료를 획득하여 배합설계와 현장시공을 2차례에 걸쳐 실시하였습니다. 배합설계(실내실험)에서는 재생골재의 세립분 및 골재파쇄로 인해 배합설계에 시간소모가 많았으며 목표입도를 맞추는데 어려움이 있었으나, 공용성능 추적조사에서는 시험시공구간의 균열이 시공후 5-6년 이후에도 발견되지 않았고 기타 포장파손도 발견되지 않아 양호한 상태를 나타내고 있었습니다. 또한, DSR을 이용한 재생바인더에 대한 피로시험결과, 일반적으로 선택되고 있는 재생골재 투입비율 30%에서 바인더의 피로수명이 베이스 아스팔트에 비하여 약 30~40%정도 감소하는 것으로 나타났습니다. 결론적으로 재생아스팔트포장의 취약점으로 알려진 균열문제는 충분한 품질관리를 통하여 극복될 수 있으며 이 품질관리에는 적절한 바인더 선택이 매우 중요할 것으로 판단됩니다. 재생아스팔트포장은 일반아스팔트포장과 비교하여 품질에 큰 차이는 없으며 재생골재의 투입비율과 바인더 선택을 적절히 하는 경우에는 국가적으로 이산화탄소 발생 억제를 통한 환경보호와 비용절감을 동시에 이룰 수 있을 것으로 보입니다. The recycled asphalt concrete has gotten increasing attention due to the environmental issues. The volume of reclaimed asphalt has increased significantly for last few years because of city remodeling, pavement maintenance, utility excavation, and road widening. Considering the value of reclaimed asphalt, it is rather used for the recycled asphalt concrete than it is used for fill and cover up material instead of soil. This research will be a supplements incomplete issues from existing research results and suggests the quality control guideline for recycled asphalt concrete and upcoming laws. As the first step of research, the trial construction of RAP(Recycled Asphalt Pavement) performed in expressway construction sites. These trial construction sites have been checked every years. And another construction sites studied and selected for more deeper performance check of RAP. For this checks, we used automatic pavement survey equipment and computerized analysis tools. Also, DSR(Dynamic Shear Rheometer) was used for the fatigue life calculation of binder blends(RAP and virgin binder). As a consequence of this research, the application of recycled asphalt provides good enough quality for highway construction. The preceeding literatures reviewed shows that the asphalt rejuvenator are used in many countries but that type of chemical agent are not used in Korea. By using the data of trial construction and mix design in Chongwon-Sangju construction lane, the surface and base courses consisted with the 10% and 30% rap mix asphalt section maintains good performance for up to 7 years. Through the performance check and laboratory tests(DSR), the quality control and mixture's low temperature prevention are the important factor and chemical agent necessary for increasing the fatigue life of RAP binder.