• Title/Summary/Keyword: 배합비

Search Result 1,608, Processing Time 0.028 seconds

A Study on the Optimal Mixture Ratio for Stabilization of Surface Layer on Ultra-soft Marine Clay (초연약 해성점토의 표층고화처리를 위한 최적배합에 관한 연구)

  • 천병식;고경환;김진춘
    • Journal of the Korean Geotechnical Society
    • /
    • v.18 no.4
    • /
    • pp.33-43
    • /
    • 2002
  • Recently, as large constructions on the coast increase, an application of a surface layer stabilization method which is one of the improvement methods for dredged soft clay has increased. However, there are few studies about this. The purpose of this study is clarifying characteristics of ultra-soft marine clay and hardening agent. Also, it is verifying an optimal mixture ratio of hardening agent through the laboratory tests according to designed experiments and proving by statistical analysis and pilot tests. Laboratory tests were performed with proper hardening agent and test soil in accordance with the design of experiments. Regression equations between hardening agents materials and unconfined compressive strength were derived from the tests. The applicability of regression equations were also verified by pilot tests. From the test results, it was found that hardening agent materials(cement, slag, fly-ash, inorganic salts, arwin, gypsum etc.) have some effect upon compressive strength. The optimal mixture ratio which satisfies the required compressive strength was derived from the statistical analysis. The effect of ground improvement by cements and hardening agents was confirmed through the pilot tests. This study will suggest data for design or construction criteria of stabilization of surface layer on ultra-soft marine clay.

Relationship between Weather-Resistance and Mixing Ratio of Mill-Base and Let-Down Silicone/Acrylic Resins (안료분산용 및 희석용 실리콘/아크릴수지의 배합비와 내후성과의 상관관계)

  • Jo Hye-Jin;Shim Il-Woo;Hahm Hyun-Sik;Park Hong-Soo
    • Polymer(Korea)
    • /
    • v.30 no.4
    • /
    • pp.350-356
    • /
    • 2006
  • In order to investigate the effect of the composition of weather-resistant coatings on physical properties, three different weather-resistant coatings were prepared by varying the ratio of a mill-base silicone/acrylic resin and let-down silicone/acrylic resin in weight ratios of 2 : 8, 3 : 7, and 4 : 6. The physical properties and weather-resistance of the prepared coatings were tested. It was found that the thermal stability, salt spray exposure, and weather-resistance were improved with increasing the amount of silicone. The optimum mixing ratio of mill-base silicone/acrylic resin to the let-down silicone/acrylic resin was 2 : 8. The coating containing silicone component of 30 wt% was found to be suitable as high weather-resistant coatings.

2 Component Adhesive Leakage Repair Sealant Evaluation (2액형 점착 실링재의 누수보수재 평가에 관한 연구)

  • Cho, Il-Kyu;Kim, Keun-Hur;Oh, Sang-Keun
    • Journal of the Korean Recycled Construction Resources Institute
    • /
    • v.4 no.4
    • /
    • pp.396-403
    • /
    • 2016
  • This study is based on the evaluation of a single component injection type adhesive repair material and a new 2 component type used in leakage of underground concrete structures. The studies showed that based on different mix ratio of the 2 component type adhesive sealant comprised of an asphalt main and latex mixture agent the viscosity of the material compound differed significantly. Based on a permeability testing, injection and economic efficiency, and performance, the appropriate ratio was determined to be 6:1 and was proceeded to the KS F 4935 evaluation method. The 2 component type adhesive sealant uses a static mixer and a cartridge type container for the injection procedure and was able to satisfy the evaluation criteria outlined in the KS F 4935 standard.

Correlation between Casagrande Test and Fall Cone Test Methods and their Applicability in Ground Improvement (카사그란데방법과 원추관입시험방법의 상관관계와 지반개량제의 적용성에 대한 연구)

  • Ko, Kun-Woo;Yeo, Dong-Jun;Kim, Kyung-Min;Lee, Byung-Suk
    • Journal of the Korean Geotechnical Society
    • /
    • v.39 no.2
    • /
    • pp.5-17
    • /
    • 2023
  • In this study, a classification and uniaxial compression test of soil was conducted on 15 collapsed sites to use ground improvement with excellent protection effect owing to the increase of localized heavy rain in Korea. The Casagrande method and fall cone test were performed on the field soil to derive an expression for comparing liquid limit and plastic limit values, soil classification, and correlation between each other. By deriving the optimal mixing ratio of the ground improvement agent using uniaxial compressive strength for each soil classification, the classification of the fine-grained soil was not clear owing to the proficiency difference and test error. However, after classifying using the fall cone test, it was possible to suggest a clear optimal mixing ratio.

Comparison of Growth Performance, Carcass and Meat Characteristics According to the Feeding Method of Concentrate and Total Mixed Fermentation in Hanwoo Steers (TMF와 배합사료의 급여방법이 거세한우의 성장 및 도체특성에 미치는 영향)

  • Park, Byung-Ki;Ahn, Jun-Sang;Choi, Jang-Geun;Kwon, Eung-GI;Shin, Jong-Suh
    • Journal of The Korean Society of Grassland and Forage Science
    • /
    • v.39 no.4
    • /
    • pp.281-291
    • /
    • 2019
  • This study was carried out to investigate the effect of the feeding method of total mixed fermentation (TMF) and concentrate feed on the growth performance, carcass and meat characteristics of late fattening Hanwoo steers. Twenty-four Hanwoo steers were used in this study. The control group was fed with concentrate feed + rice straw from the growing to the late fattening period, while the T1 group was fed with TMF from the growing to the early fattening period and concentrate feed + rice straw for the late fattening period. The T2 group was fed with TMF from the growing to the late fattening period. The average daily gain (ADG) and feed conversion ratio (FCR) were not different between the treatment and control group. Serum cholesterol and high density lipoprotein (HDL) cholesterol concentrations were higher in the T2 groups than in the control group (p<0.05). The yield grade and quality grade were not different between the treatment and control group. The lightness of longissimus muscle was higher in the T1 group than in the control and T2 groups (p<0.05). Poly-unsaturated fatty acid (PUFA) of longissimus muscle was increased in the T2 groups than in the control group. Therefore, the method of feeding TMF and concentrate feed could have a positive effect on the lightness and fatty acid composition of longissimus muscle without affecting the growth and carcass grades of Hanwoo steers.

Development of Herbal Chicken Porridge and the Establishment of Optimizing the Mixing Ratio (한방 닭죽 개발 및 최적 배합비율 확립)

  • Kim, Kyung-Yeon;Baik, Moo-Yeol;Park, Cheon-Seok;Choi, Sung-Won;Kim, Chang-Nam;Kim, Byung-Yong
    • The Korean Journal of Food And Nutrition
    • /
    • v.26 no.1
    • /
    • pp.22-28
    • /
    • 2013
  • The objectives of this study were to develop porridge with medicinal herbs and chicken breast meat and to find out the optimum mixing ratio. Several herb extracts such as Acanthopanacis senticosus, Rehmannia glutinosa, Disocorea japonica, and Poria cocos Wolf were used in the ratio of 2, 1, 1, and 1, respectively. The optimum processing condition for herbal chicken porridge was determined by a design expert program. Seventeen experimental points were selected, and herb extracts (82~101 g), chicken breast meat (30~50 g), and glutinous rice (40~60 g) were chosen as the independent variables. The measured responses were preference of taste, DPPH radical scavenging, SOD-like activity, and cost. The optimum formulation of herbal chicken porridge using the numerical analysis was set at herbal extracts (101 g), chicken breast meat (38.66 g), and glutinous rice (41.34 g) with a 0.714 desirability value. DPPH radical scavenging effect, preference of taste and the cost showed a linear model, whereas SOD-like activity showed a quadratic model indicating a higher interaction among the mixture. As a result of proximate composition of optimized herbal chicken porridge, the contents of moisture, carbohydrate, crude protein, crude lipid, and ash contents were 76.4, 9.0, 1.4, 0.5, and 1.6%, the calories of the porridge was 46.1 kcal/100 g.

발굽관리

  • 양창근
    • 월간낙농육우
    • /
    • s.162
    • /
    • pp.107-113
    • /
    • 1995
  • 젖소의 건강을 위하여 다리와 발굽은 중요한 요소이다. 그러므로, 발굽병은 가능한 한 충분히 예방 관리되어야 한다. 이것은 올바른 양축관리에 의해서 이루어질 수 있다. 적절한 발굽관리를 할 때, 파행은 그리 심각한 문제가 아닐 것이다. 적절한 발굽관리를 위한 기준은 다음과 같다. 1. 불결한 주변환경을 피하기 위한 적절한 배수로 및 건조한 지표면으로 위생적인 환경을 유지하는 것. 2. 양질의 조사료의 충분한 급여 및 배합비의 급작스런 변경을 지양할 것.

  • PDF