PURPOSES : The objective of this study is to analyze the significance of binder aging in a hot-mix asphalt (HMA) mixture in an insulated camber for a long duration for repair works, where the absolute viscosity level and service life reduction (SLR) are assessed based on the haul time, as well as to suggest a methodology for reducing the aging level. METHODS : Because the HMA mixture is stored in an insulated box carriage at high temperature for repair works, if the binder in the mix is severely oxidized, then the repaired pavement will not exhibit a long service life. Therefore, the 13-mm dense-graded HMA mix with PG64-22 was aged in an oven at 160 °C for 1, 2, 4 and 8 h to evaluate its aging level. Gel-permeation chromatography was performed on the mixture particle without binder recovery to measure the large-molecular size ratio, from which the estimated absolute viscosity (EAV) was computed using a best-fit regression model. The SLR values of aged and repaired mixes were estimated to determine the amount of deterioration in the mixes caused by severe aging. Hydrated lime (HL) was introduced into the mix at a ratio of 1.5 wt% of the total mix. The aging level and SLR were compared with those of the repaired mix without HL. RESULTS : The binder EAV of the HMA mix increases significantly with the mixture aging duration. In particular, the binder EAV level of a 4-h aged mix is similar to the asphalt viscosity level of a pavement with approximately 7 years of service life. The service life expressed based on the aging level is interpreted as the reduced service life of the aged mix, which is already oxidized before it is used. Meanwhile, the binder of an 8-h aged mix without HL aged significantly and its SLR is approximately 11 years. However, its aging level and SLR reduced significantly when HL. is incorporated. CONCLUSIONS : The binder aging level of the repaired mix increases significantly with its storage duration in a hot chamber for carriage. However, since the aging level decreases significantly by the incorporation of HL, the use of HL is highly recommended when preparing new mix for repair works to be performed in a hot-chamber for a long duration.

범죄의 심각성 지각이 높으면 전과자에 대한 부정적 태도를 갖게 되고 나아가서 재범율 상승의 원인이 된다. 이런 논리적 사고를 입증하기 위해서 대학생 253명에 대한 집단조사를 2004년 실시하였다. 분석결과를 보면 응답자들은 범죄를 심각하게 생각하고 있었으며, 또한 자신이 범죄 피해자가 되거나, 범죄자가 될 것이라는 응답도 다소 높은 편이었다. 자신에 대해서 그렇게 생각하는 이유는 자신의 의지가 약해서, 험악한 사회적 영향을 배제하기 어려워서 같은 것들이었다. 또한 전과자에 대해서 어떤 특별한 이유 없이 부정적 태도를 나타내었다. 교도행정은 수형자들의 재사회화를 위해서 갖가지 프로그램을 실시하고 있지만, 일반 시민들의 전과자에 대한 부정적 태도를 약화 내지는 소멸시키지 않는 한 모든 노력은 허사가 되고 만다. 그런 이유에서 정부는 일반 사람들이 전과자에 대해서 긍정적 태도를 유도하기 위헌 방안을 모색해야 한다.