• Journal of the Korean Recycled Construction Resources Institute
• /
• v.6 no.4
• /
• pp.283-288
• /
• 2018

Since the crack self-healing materials are activated according to the exposure environmental conditions from the time of crack occurrence, it is very important to clarify the relationship between the healing performance and the exposure environmental conditions of the crack surface. In this paper, the influence of the exposure environmental conditions on the crack healing performance of self-healing repair mortar was investigated through the water permeability test. The influence of temperature and humidity on the crack width of cracked specimens was evaluated. As a result of measuring the change of the crack width, the effect of curing temperature was negligible but it was confirmed that crack-closing occurred due to the change of dry-wet condition. The healing materials produced on the crack surface of the specimens was identified as calcite minerals. Since the minerals with high density are precipitated under the influence of gravity, the healing performance is somewhat different according to the direction of the crack surface, and the healing performance was significantly improved in the wet exposure condition than the air exposure condition.

• Journal of the Korean Recycled Construction Resources Institute
• /
• v.10 no.4
• /
• pp.531-538
• /
• 2022

In this study, the self-healing hybrid capsules were prepared, were mixed with 3 %, 5 %, and 7 % based on cement mass. The healing performance were evaluated according to mixing ratio self-healing hybrid capsule. As a result of the experiment, it was found that the crack healing performance improved as the mixing rate of the self-healing hybrid capsule increased, but the quality performance tended to decrease. Therefore, it is judged that using the mixing ratio of the hybrid capsule within 5 % reduces the quality performance to within about 10 % and secures about 90 % or more of the healing performance.

• 한국벤처창업학회:학술대회논문집
• /
• 2021.04a
• /
• pp.155-159
• /
• 2021

현대인들은 학업, 취업, 업무, 장수 스트레스 등 연령대별로 다양한 환경 스트레스에 시달리고 있다. 특히 우리나라의 자살사망률은 OECD 국가 중 가장 높은 수준으로 최근 코로나19와 관련한 걱정과 두려움, 불안, 우울을 느끼는 국민이 늘어나면서 자살시도도 증가세에 있다. 치유농업은 이러한 다양한 사회문제를 해결하기 위한 대안으로 제시되고 있으며 농촌자원들을 활용하여 사람들에게 휴식처를 제공하고 기획된 프로그램을 통해 치유할 수 있어 그 만족도가 높게 나타나고 있다. 우리나라의 치유농업은 2020년 3월 치유농업 관련법이 제정되면서 본격적인 활성화가 예상되고 있으나 치유농업에 대한 다양한 학술적인 연구는 많이 부족한 실정이다. 본 연구의 목적은 치유농업 체험자를 대상으로 치유농업프로그램의 유형이 체험만족도에 미치는 영향을 조사하고, 기능적이미지와 감정적이미지가 매개역할을 하는지에 대해 분석하는데 있다. 본 연구에서는 독립변수에 치유농업프로그램의 대표적인 유형인 원예치유, 동물매개치유, 음식치유, 숲치유 4가지를 선정하였고 종속변수에 체험만족도를 선정하여 영향을 미칠 것이라는 인과적 경로를 검증하고자 한다. 또한, 기능적이미지와 감정적이미지의 매개효과를 중심으로 진행하고자 한다.

• Journal of the Korean Recycled Construction Resources Institute
• /
• v.10 no.4
• /
• pp.600-608
• /
• 2022

This study investigates the effect of layered double hydroxide (LDH) on the healing performance of self-healing concrete by assessing the chloride penetration resistance of self-healing cement mortars using electrical chloride ion migration-diffusion test. Test results show that both mortars containing healing materials only and mortars containing healing materials and Ca-Al LDH together mostly had higher migration-diffusion coefficients right after cracking, but the migration-diffusion coefficients decreased more than that of OPC with increasing healing ages, and thus, they yielded higher healing capacities than OPC. Also, mortars containing Ca-Al LDH together with healing materials showed higher reduction of their migration-diffusion coefficients, and thus, higher healing capacities than mortars containing healing materials only. This suggests that as the self-healing product increases on the crack surface, the binding of chloride ions by LDH inside the crack increases.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2018.11a
• /
• pp.292-293
• /
• 2018

여가생활과 건강에 대한 관심이 증대함에 따라 웰니스와 휴양과 관련한 컨텐츠가 요구되면서 산림치유, 해양치유와 같은 헬스 투어리즘에 대한 관심이 높아지고 있다. 산과 바다를 모두 갖고 있는 우리나라의 경우 치유산업의 발전가능성이 충분하고 치유자원 발굴, 효능에 관련된 연구도 진행되고 있다. 해양치유시설은 프로그램에 맞게 제어 가능한 실내에 비해 옥외활동에는 가능한 시간, 기후가 한정되어 있으며 지역특성에 따라 달리 적용되어야 함에도 불구하고 아직 명확한 기준이 미비하다. 이에 본 연구는 해양치유 옥외활동에 적합한 기후환경 가이드라인 개발을 위해 온열환경, 풍환경, 공기환경 및 체감온도, 불쾌지수와 같은 생활지수와 같은 항목을 정리하고 해당 데이터를 활용하여 옥외활동을 할 수 있는 시간, 기후 등 판단기준을 작성하고자 한다.

• Journal of Wetlands Research
• /
• v.25 no.4
• /
• pp.386-393
• /
• 2023

The domestic marine healing industry is undergoing significant revitalization efforts, with a focus on understanding the efficacy and effectiveness of marine healing resources. This study establishes utilization and management standards through a detailed analysis of the active components within well-recognized marine healing mud materials. Samples of mud materials were collected from domestic tidal flats. These samples exhibited an average composition of 7.87% sand, 74.95% silt, and 17.17% clay, with a combined mud content (silt+clay)(silt+clay) consistently exceeding 90%. Notably, SiO₂ emerged as the most prevalent effective ingredient at 68.4%, followed by Al₂O₃ (13.3%)>Fe₂O₃ (4.0%)>K₂O (2.9%)>Na₂O (2.3%)>MgO (1.6%)>CaO (1.0%)>TiO₂ (0.7%), in terms of average content. Subsequently, through an analysis of effective ingredients, Si, Al, Fe, K, Na, Mg, and Ca were identified as elements demonstrating significant functionality. Among these, key indicator ingredients were selected for quality control, all of which were found to possess efficacious properties. Notably, K, Mg, and Ca exhibited particularly high concentrations. Based on these findings and referencing existing literature, it is recommended that domestic tidal flat mud resources earmarked for utilization as marine healing resources should possess a raw material mud content of no less than 70.0%. Moreover, the cumulative index components K₂O+MgO+CaO should meet or exceed a threshold of 5.0% for optimal effectiveness.

• Journal of Agricultural Extension & Community Development
• /
• v.20 no.4
• /
• pp.909-936
• /
• 2013

This study investigated definition of care farming in which advanced countries in agricultural industry such as Netherlands and Belgium increase their interest and investment, and established a strategy for settlement and development of care farming industry in Korea. For achieving purpose of the study, literature review was implemented to analyze policy, system, related law, workforce of advanced countries in care farming, and experts' conference which consists of 9 representatives such as professors, researchers in areas of agriculture, health, education, horticulture, animal-assisted therapy was implemented. Also survey was conducted targeting 165 people of practitioners in care farming industry. For the result, the concept of care farming in Korea was defined as 'Industry and activity which promotes psychological social physical cognitive health of every Korean people by utilizing agricultural resources(plants, livestock, rural environment, rural culture) or related activity and output', and the purpose, resources, targets of care farming was determined by the definition.

• Journal of the Korean Recycled Construction Resources Institute
• /
• v.9 no.3
• /
• pp.389-396
• /
• 2021

In this paper, it was evaluated that the effect of self-healing microcapsules on the quality and healing properties of cement composites. In the mixing of microcapsules, the plastic viscosity and yield stress of the cement composites decreased due to the particle properties of the microcapsules, and decreased in proportion to the mixing ratio. The table flow showed a tendency to decrease as the core material acted as a stimulant due to the loss of microcapsules, and the compressive strength could be supplemented through unit quantity correction. As a result of evaluating the effect of microcapsule mixing on the healing properties of cement composites, it was found that the unit water flow rate decreased by the healing reaction immediately after crack initiation. When more than 3% of microcapsules were mixed, it was found that there was a healing rate of more than 95% at 7 days of healing age.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2018.05a
• /
• pp.20-21
• /
• 2018

해양수산부는 우리나라 연안에 산재하는 해양치유자원의 임상적 효능과 관련 지역산업 활성화 기반마련을 위한 R&D 사업을 추진 중에 있음. 특히 주요 연안지역을 중심으로한 해양치유의 정착 및 활성화를 위해서는 필수 인프라를 바탕으로 다양한 프로그램을 운영할 핵심해양치유센터(가칭)의 역할이 매우 중요함. 따라서 이번 연구에서는 울진(월송정일대)과 태안(달산포일대)을 중심으로 지역 환경사회경제적 현황과 연계된 해양치유 특성화를 위한 핵심해양치유센터의 역할과 기능을 도출하여 제시함.

• Journal of the Korean Recycled Construction Resources Institute
• /
• v.8 no.4
• /
• pp.475-482
• /
• 2020

In this study, three levels of solid capsules were prepared according to the composition ratio of core materials for the crystal growth type self-healing solid capsule, and a cement mortar was prepared with the crystal growth type self-healing solid capsule. The prepared solid capsule was mixed with 3% of the cement mass to evaluate the healing properties according to the crack induction age of the cement mortar. As a result of test, the crack healing properties according to the crack induction age of cement mortar mixed of solid capsules, it was confirmed that the self-healing performance of the cement mortar with the solid capsules was increased self-healing performance of 7 days than 28 days. This is because the unhydrated binder remains.