• 제목/요약/키워드: Mix Design

검색결과 916건 처리시간 0.035초

수화열 해석프로그램을 이용한 기초 매스콘크리트의 사전 배합선정 및 수화열 검토 (Study on Hydration Heat and Contact the Mix-Design of Foundation Mass Concrete Using Hydration Temperature Analysis Program)

  • 설준환;조만기;방홍순;김옥규
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2019년도 춘계 학술논문 발표대회
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    • pp.105-106
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    • 2019
  • In this research, considering the practical conditions at field, thermal cracking method was suggested based on the comparative analysis between predicted value and actual value obtained from the actual structure member with optimum mix design. The optimum mix design was deduced from the various mix designs with various proportions of cementitious binder for upper and lower placement lifts of mat-foundation mass concrete. Therefore, it can be stated that applying low heat mix design and different heating technique between upper and lower placement lifts for mass concrete are efficient to control the thermal cracking. As future issues, based on the interpretation result value, we will select the optimal combination that is applied specifically to the actual site, and deeply analyze the correlation between the measured value and the analysis value through the combination and the test of the actual structure.

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현장 콘크리트 타설시 양생온도와 대기시간을 고려한 배합설계 결정 (Design of a Concrete Mix Considering Curing Temperature and Delay Time in Concrete Placement)

  • 문성우;이성행;최현욱
    • 한국건설관리학회논문집
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    • 제20권1호
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    • pp.133-140
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    • 2019
  • 콘크리트 타설현장의 조건은 콘크리트 강도에 커다란 영향을 주며, 따라서 콘크리트 배합은 콘크리트 타설시 현장조건을 반영할 수 있도록 설계되어야 한다. 즉, 콘크리트 배합은 현장양생온도, 작업환경, 타설방법 등을 고려하여 최적화하는 노력이 필요하다. 본 연구목적은 현장 콘크리트 타설시 발생하는 양생온도와 작업지연 등 외부영향인자를 고려하여 가장 대응을 잘 할 수 있는 콘크리트 배합설계를 제공하는 것이다. 연구목적을 달성하기 위해서 본 연구에서는 로버스트 설계방법을 콘크리트 배합설계에 적용했다. 사례분석에서는 양생온도와 작업지연 등 외부영향요인과 함께 콘크리트 성분의 조합을 적용하여 콘크리트 실내 테스트를 실시했다. 실험결과 로버스트 설계방법을 적용할 경우 외부영향요인이 주어 졌을 때 가장 효과적으로 대응을 할 수 있는 콘크리트 배합설계를 선정할 수 있다는 것을 알 수 있었다.

레디믹스드콘크리트의 조합설계안 분석보고 (An Analysis Report on the Mix Design of Ready Mixed Concrete)

  • 최민수;김무한
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 1992년도 가을 학술발표회 논문집
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    • pp.54-57
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    • 1992
  • This report presents the survey findings on the proportioning of ready mixed, concrete mixtures. According to this report, the W/C ratio and S/A ratio, based upon the type 25-210-12, in mix proportion of ready mixed concrete are 53% and 45% respectively. The problems to be improved, coming out in this study, are (1)using the adequate quantity of cement (2) alternation of mix design cope with the change of kinds of aggregates (3)large standard error in the mix proportion.

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현대 로맨티시즘 패션에서 나타난 믹스 앤 매치 스타일 분석 (Analysing Mix and Match Style Appeared at the Modern Romanticism Fashion)

  • 이민정;이인성
    • 복식문화연구
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    • 제17권4호
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    • pp.653-662
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    • 2009
  • The past Romanticism, which emphasized loveful, womanish property, has changed into new-concept Romanticism as it was harmonized with various emotional cultures and trends in the 21st century. New-concept romanticism is found in various fields ranging from personality, diversity and discrimination to emotion. It is appearing as a new style searching for taste as it is mixed and matched with other fields. In fashion, Romanticism and mix-and-match trend provide womanish feeling through the match with romantic chiffon, high-waisted pants and cashmere cardigan and show modern emotion through vest and short blazer. Therefore, it is necessary to reconsider the method to analyze and express fashion emotion style on the basis of mix-and-match trend of Romanticism. The purpose of this study is to analyze how Romanticism is expressed in the mix and match with other emotional style, predict direction of Romanticism style and establish the ground to find changing fashion trend accurately. The researcher expects that design development will be focused on the fashion, which is more various and characteristic and search for convenient, healthy life, on the basis of the analysis on mix and match shown in Romanticism fashion of the study. The researcher tried to provide the base of design development and assist design activation by using mix and match, which can create various new styles, accurately and understanding and predicting the fashion trend of the 21st century.

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Genetic algorithm in mix proportion design of recycled aggregate concrete

  • Park, W.J.;Noguchi, T.;Lee, H.S.
    • Computers and Concrete
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    • 제11권3호
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    • pp.183-199
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    • 2013
  • To select a most desired mix proportion that meets required performances according to the quality of recycled aggregate, a large number of experimental works must be carried out. This paper proposed a new design method for the mix proportion of recycled aggregate concrete to reduce the number of trial mixes. Genetic algorithm is adapted for the method, which has been an optimization technique to solve the multi-criteria problem through the simulated biological evolutionary process. Fitness functions for the required properties of concrete such as slump, density, strength, elastic modulus, carbonation resistance, price and carbon dioxide emission were developed based on statistical analysis on conventional data or adapted from various early studies. Then these fitness functions were applied in the genetic algorithm. As a result, several optimum mix proportions for recycled aggregate concrete that meets required performances were obtained.

티셔츠 원 포인트 그래픽에 나타난 Mix & Match 시각 이미지 분석 (The Analysis of Mix & Match Visual Image of One-Point Graphic Appeared in T-shirt)

  • 이미연
    • 복식문화연구
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    • 제13권5호
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    • pp.777-789
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    • 2005
  • Mix & Match Visual Image, appearing in T-shirt one-point graphics, is a new visual image emerged as a result of several trends: development of cutting-edge machinery and computer programs, various needs of consumers, and an international trend of fusion concept. Thus, a concrete research of Mix & Match Visual Images is demanding. This paper studies one-point graphic, which appeared in the SamsungDesignNet, Interfashion Planning, and firstviewkorea, with a focus on apparel T-shirt of women's wear and casual wear from 2001 to 2004. The study shows that the most preferred independent visual image in Mix & Match Visual Images is a typography, and next is in the order of marks, symbols, geometric diagrams and abstract shapes, animals and plants, characters, materials, and collages. As Mix & Match of independent visual images was mainly combined typography with other independent visual images, we need to develop more Mix & Match Visual Images using various independent visual images's mix and match. Then, T-shirt will be one of the most representative items in Korean fashion trend that enable consumers to express their characters, escaping from the old-fashioned concept that T-shirt is just a T-shirt.

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디자인마케팅의 4Cs 요소정립과 4C Mix구현에 관한 연구 (A Study on Development of 4Cs and Establishment of 4C Mix for Design Marketing)

  • 이진렬;김은영
    • 디자인학연구
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    • 제18권2호
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    • pp.15-26
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    • 2005
  • 최근 디자인 분야의 두드러진 특징 중의 하나는 마케팅과의 결합이다. 그러나 전통적인 마케팅의 영역과 디자인마케팅의 영역에는 차이가 있어 기존의 마케팅 개념을 디자인 분야에 그대로 적용시키기보다는 새롭게 재구성되어져야 할 필요가 있다. 따라서 본 연구에서는 디자인 환경에 맞는 디자인마케팅의 개념 구성요소들을 재정립하여 디자인마케팅의 구성요소와 활용방안을 제안하는데 그 목적이 있다. 연구의 내용으로는 첫째, 디자인마케팅의 등장배경과 현황을 디자인의 학제적 특성과 관련하여 살펴보고 둘째, 전통적인 마케팅의 기본적인 개념구성요소들을 고찰하였으며 셋째, 그를 바탕으로 디자인 환경에 맞는 디자인마케팅의 개념구성요소로써 4Cs를 제안하였다. 마지막으로 새롭게 제시된 개념구성요소들을 유기적으로 재구성하여 디자인 개발 프로세스 상에서 효율적으로 활용할 수 있는 4C Mix를 제안하였다. 이론적으로 디자인마케팅의 구성요소를 전통적인 마케팅의 구성요소를 바탕으로 새롭게 재구성하였고, 실무적으로 디자이너들이 디자인 프로세스 상에서 활용할 수 있는 시장 지향적인 프레임웍을 제시했다는데 의의가 있다.

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무시멘트 상온 재활용 아스팔트 기층의 현장 적용성을 통한 양생기간에 관한 연구 (Study of the Curing Time of Cementless Cold Central Plant Recycled Asphalt Base-Layer through Field-Application Review)

  • 최준성;정철호;이찬희;임인수
    • 한국도로학회논문집
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    • 제19권2호
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    • pp.67-74
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    • 2017
  • PURPOSES : The objective of this study is to ascertain the curing period of cementless cold central plant recycled asphalt base-layer, using mechanical analyses and specimen quality tests on the field. METHODS : Cold central plant recycled asphalt base-layer mixture was produced in the plant from reclaimed asphalt, natural aggregate, filler for the cold mix, and the modified emulsion AP using asphalt mix design and plant mix design. In order to examine the applicability of the curing period during the field test, the international standards for the possibility of core extraction and the degree of compaction and LFWD deflection were analyzed. Moreover, Marshall stability test, porosity test, and indirect tensile strength test were performed on the specimens of asphalt mix and plant mix design. RESULTS : The plant production process and compaction method of cementless cold central plant recycled asphalt base-layer were established, and the applicability of the optical moisture content for producing the mixture was verified through the field test. In addition, it was determined that the core extraction method of the conventional international curing standard was insufficient to ensure performance, and the LFWD test demonstrated that the deflection converges after a two-day curing. However, the back-calculation analysis reveals that a three-day curing is satisfactory, resulting in a general level of performance of dense asphalt base-layer. Moreover, from the result of the specimen quality test of the asphalt mix design and plant mix design according to the curing period, it was determined that the qualities satisfied both domestic and international standards, after a two-day curing. However, it was determined that the strength and stiffness after three-day curing are higher than those after a two-day curing by approximately 3.5 % and 20 %, respectively. CONCLUSIONS:A three-day curing period is proposed for the cementless cold central plant recycled asphalt base-layer; this curing period can be demonstrated to retain the modulus of asphalt-base layer in the field and ensure stable quality characteristics.

최대밀도이론을 이용한 아스팔트 혼합물의 배합설계에 관한 연구 (The Study of Asphalt Concrete Mixture Design Using Maximum Density Theory)

  • 이승한;박현묘;정용욱;장석수;김장욱
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2005년도 봄학술 발표회 논문집(II)
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    • pp.525-528
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    • 2005
  • This study determines the best composite grade to minimize the void of aggregate mixture based on the maximum density theory in an attempt to suggest a mix proportion method design for asphalt mixtures. Study results show that the grading curve with the maximum mass per unit capacity of each aggregate mixture satisfied the KS standards and the optimum AP content to meet the optimal asphalt mixture void rate of 4$\%$ was 5.7$\%$, less than the optimum AP content of 6.5$\%$ suggested in the Marshal mix proportion method design. At the same time, the asphalt mixture produced based upon the suggested mix proportion method had a flow value 17$\%$ lower than that of asphalt mixture produced according to the Marshal method, while its density was greater by 0.06$\~$0.09. This suggests that the introduced mix proportion method design helps to improve the shape flexibility and crack-resistance of asphalt concrete.

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