This study focuses on the issue of premature failure in patched sections of asphalt concrete overlays during the service life of existing concrete slabs. These failures are typically exacerbated by extreme weather and heavy traffic. To overcome the low durability and moisture susceptibility of conventional patching materials, the applicability of the GA (Guss Asphalt) mixture, which is known for its excellent waterproofing and adhesion properties, was investigated. Additionally, the fundamental performance characteristics of GA, including its initial stability, moisture resistance, porosity, and plastic-deformation resistance, were evaluated. In this laboratory study, the stability, flow value, and porosity (V a) of six types of pavement patch materials (including GA/MA (Mastic Asphalt), HMA (Hot Mix Asphalt), and CMA (Cold Mix Asphalt) mixtures) were evaluated under various initial curing conditions (3–48 h) and environmental conditions (air and water at 25 °C). Additionally, a wheel tracking test was performed in air conditions at 25 °C to compare and analyze the dynamic stability and plastic-deformation resistance. The results show that GA exhibited the highest stability under all conditions. Its stability increased significantly after 48 h of curing in water, thus demonstrating its superior moisture resistance compared with that of HMA, whose stability decreased significantly. Porosity analysis indicates that the GA/MA mixtures (GMA, PMA, and PGMA) exhibited low porosity (< 1%) and high saturation (> 97%), thus confirming a dense pore structure. Furthermore, the results of the wheel tracking test show that the HMA and GA mixtures exhibited the highest dynamic stability under both 24- and 48-h curing durations. In particular, the GA mixture showed the smallest rutting depth (0.9–1.0 mm), thus indicating its superior resistance to plastic deformation. By contrast, the CP-A mixture showed the largest rutting depth (32.5–38.4 mm), thus indicating the greatest susceptibility to plastic deformation, whereas the CP-B mixture exhibited relatively stable performance with a rutting depth of 5.4–5.6 mm. In general, the GA/MA mixtures exhibited the best performance in terms of long-term stability (48 h of curing), moisture resistance, and plastic-deformation resistance compared with conventional HMA and CMA (CP-A and CP-B) mixtures. GA mixtures are considered the optimal alternative for road patching and repair owing to their excellent moisture resistance and plastic-deformation resistance at 25 °C. However, their field application requires consideration of various environmental conditions, thus necessitating further comprehensive investigations into their crack resistance, adhesion, and plastic-deformation behavior.

최근 국내는 이상기후에 따른 극심한 폭염이 지속되고 있으며, 잦은 국지성 호우로 인한 도로 공용수명을 현저히 단축시키고 있다. 국지성 호우 시, 도로 위 유수량의 급격한 증가는 도로 포장체 내 균열, 공극, 신축이음부를 통한 수분 침투를 가속화 한다. 이와 더불 어, 중차량의 교통하중이 반복적으로 지속 될 경우, 포장체 내부의 골재-바인더 간 결합력이 저하되어, 포트홀, 소성변형, 골재비산 등 의 포장 파손을 야기한다. 국내의 일반국도 및 고속도로에서는 아스팔트 노면 위 포트홀, 함몰, 국부적 균열 등의 파손이 발생 시, 일반적으로 파손부를 절삭 · 제거하고, 상온 또는 가열, 중온 아스팔트 혼합물로 유지보수를 수행한다. 하지만 파손부에 임시방편으로 긴급 보수재를 사용할 경우, 지속적인 강우와 차량의 교통하중으로 인해 골재와 바인더 간 결합력을 약화시키고, 신·구 포장 경계면의 부착강도가 저하되어 보수 부위가 쉽게 파손되는 문제가 발생하고 있다. 이는 고속 주행 차량의 안전을 심각하게 위협하는 요인으로 작용한다. 본 연구에서는 방수 · 부착성이 우수한 과립형 구스 매스틱 아스팔트 혼합물(Granular Guss Mastic Asphalt Mixture, 이하 GGM-AM) 을 이용해 소파 보수재료서의 적용성을 검토하기 위해 내구성능에 대한 실내 기초물성실험 결과를 비교 · 분석하였다.

최근 국내는 이상기후에 따른 극심한 폭염이 지속되고 있으며, 잦은 국지성 호우로 인한 도로 공용수명을 현저히 단축시키고 있다. 국지성 호우 시, 도로 위 유수량의 급격한 증가는 도로 포장체 내 균열, 공극, 신축이음부를 통한 수분 침투를 가속화 한다. 이와 더불 어, 중차량의 교통하중이 반복적으로 지속 될 경우, 포장체 내부의 골재-바인더 간 결합력이 저하되어, 포트홀, 소성변형, 골재비산 등 의 포장 파손을 야기한다. 국내의 일반국도 및 고속도로에서는 아스팔트 노면 위 포트홀, 함몰, 국부적 균열 등의 파손이 발생 시, 일반적으로 파손부를 절삭 · 제거하고, 상온 또는 가열, 중온 아스팔트 혼합물로 유지보수를 수행한다. 하지만 파손부에 임시방편으로 긴급 보수재를 사용할 경우, 지속적인 강우와 차량의 교통하중으로 인해 골재와 바인더 간 결합력을 약화시키고, 신·구 포장 경계면의 부착강도가 저하되어 보수 부위가 쉽게 파손되는 문제가 발생하고 있다. 이는 고속 주행 차량의 안전을 심각하게 위협하는 요인으로 작용한다. 본 연구에서는 방수 · 부착성이 우수한 과립형 구스 매스틱 아스팔트 혼합물(Granular Guss Mastic Asphalt Mixture, 이하 GGM-AM) 을 이용해 소파 보수재료서의 적용성을 검토하기 위해 내구성능에 대한 실내 기초물성실험 결과를 비교 · 분석하였다.

The pharmaceutical industry is an industry that provides medicines related to the health and life of the people. The pharmaceutical industry is a traditional regulation industry with the characteristics of R&D(Research and Development), purchasing, manufacturing, distribution and consumption under strict government management. Until now, pharmaceutical companies have continued to make efforts to maintain competitiveness through patent management, new product development, and marketing. However, industries are rapidly changing, including rising costs for developing new products and expanding generic markets. As these changes and uncertainties in the management environment increase, efforts are required to improve the competitiveness of the pharmaceutical industry from a new perspective. In this study, we intend to examine the impact of SCM(Supply Chain Management) dynamic capability of pharmaceutical companies on corporate performance through partnerships to respond to market changes and uncertainties. It was determined that the agility, visibility and flexibility that constitutes the SCM dynamic capabilities would affect the performance of pharmaceutical companies. In this study, the importance of SCM dynamic capabilities and cooperative relationships was identified through surveys by SCM managers of pharmaceutical companies. Consequently, in the pharmaceutical industry, which is a regulatory industry, we have identified that SCM dynamic capabilities and cooperative relationships with partner companies have a significant impact on corporate performance.

The present study identified several antecedents that create perceived resistance to supply chain management (SCM) change. This work particularly emphasizes SCM change, which is notable given its central role in reacting market orientation and varied environmental and managerial conditions. A careful case study on a small and medium sized food production company in South Korea leads to the formulation of our framework including one second-order construct of ‘resistance’ as well as eight first-order constructs of ‘implementing the payment terms’, ‘balancing of business process’, ‘fear of responsibility’, ‘business sustainability transparency’, ‘past experience of failure’, ‘competence of work personnel’, ‘cooperation with third parties’ and ‘sharing personnel information with partner’. The hypothesized relation of first- and second-order construct was validated using survey sample data collected from 350 respondents who completed their questionnaire instrument. Results from confirmatory factor analysis revealed that nomological validity was established at statistical significance level by identifying six first order constructs of ‘implementing the payment terms’, ‘fear of responsibility’, ‘business sustainability transparency’, ‘past experience of failure’, a conbined construct of 'competence of work personnel/ cooperation with third parties’ and ‘sharing personnel information with partner’. The findings from our work are expected to provide important insights to the strategy for SCM risk management for small and medium sized company.