• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2003년도 가을 학술발표회 논문집
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• pp.437-440
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• 2003

This study has focused on the possibility for recycling of tailings from the Sangdong tungsten mine as powder of self-compacting concrete(SCC). The experimental tests for slump-flow, reaching time to the slump-flow of 500mm, V-funnel and U-box were carried out in accordance with the specified by the Japanese Society of Civil Engineering(JSCE). The result of this study, in case of SCC mixed with tailings, slump-flow was decreased with increasing mixing ratio. But reaching time slump-flow of 500mm, V-funnel and U-box were satisfied a prescribed range. The mechanical properties including compressive strength, splitting tensile strength and static modulus of elasticity were checked with the requirements specified by Korean Industrial Standard(KS). The compressive strength of SCC was decreased with increasing replacement, splitting tensile strength and static modulus were similar to those of normal concrete.

• Computers and Concrete
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• 제5권5호
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• pp.461-473
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• 2008

The paper explores the potential of Support Vector Machines (SVM) approach in predicting 28-day compressive strength and slump flow of self-compacting concrete. Total of 80 data collected from the exiting literature were used in present work. To compare the performance of the technique, prediction was also done using a back propagation neural network model. For this data-set, RBF kernel worked well in comparison to polynomial kernel based support vector machines and provide a root mean square error of 4.688 (MPa) (correlation coefficient=0.942) for 28-day compressive strength prediction and a root mean square error of 7.825 cm (correlation coefficient=0.931) for slump flow. Results obtained for RMSE and correlation coefficient suggested a comparable performance by Support Vector Machine approach to neural network approach for both 28-day compressive strength and slump flow prediction.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2013년도 추계 학술논문 발표대회
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• pp.74-75
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• 2013

The paper study on the mechanical properties of reactive powder concrete using copper slag. A change in the replacement ratio s of copper slag was measured compressive strength and slump flow. As a results, slump flow using copper slag tend to increase slump flow with replacement ratio. As the concrete with a replacement ratio of copper slag up to 30% was found to have a compressive strength superior to that of plain.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2013년도 추계 학술논문 발표대회
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• pp.76-77
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• 2013

The paper study on the mechanical properties of self-compacting concrete with waste marble powder. A change in the replacement ratio s of waste marble powder was measured compressive strength and slump flow, U-Box. As a results, Slump flow and U-box using waste marble powder tend to increase slump flow and compacting with replacement ratio. As the concrete with a replacement ratio of copper slag up to 10% was found to have a compressive strength superior to that of plain.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2022년도 봄 학술논문 발표대회
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• pp.53-54
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• 2022

This study is a basic study to establish the relationship between the conventional fluidity evaluation data of concrete and the rheology parameters. the slump flow and rheology parameters were measured according to the elapsed time after the concrete was mixed. The correlation between the slump flow and the rheology constant was analyzed and the effect of the elapsed time after concrete beating on the correlation between the two data was analyzed.

• 한국지반신소재학회논문집
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• 제16권2호
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• pp.89-96
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• 2017

본 연구에서는 국내에서 30m 이상인 대심도에서 강성이 큰 CS-H벽체를 만들기 위하여 지반신소재를 이용하였으며 지반신소재의 혼입율과 슬럼프(슬럼프 플로우) 값에 변화를 주어 현장여건에 맞는 배합을 실시하였으며 목표 슬럼프 180mm 및 슬럼프 플로우 500mm에서는 초기 휨강도, 장기 거동특성 및 탄성계수의 역학적 특성과 동시에 경제성을 모두 만족할 수 있는 배합을 확인하였으나 슬럼프 플로우 600mm에서는 역학적 특성 및 초기, 장기 거동특성에서 취약한 결과를 보였다.

• 농업과학연구
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• 제7권2호
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• pp.109-118
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• 1980

Slump시험(試驗)보다는 조작(操作)이 간편(簡便)한 유통(流動) Table을 사용(使用)하여 화강암질풍화토(花崗岩質風化土)의 유동한계(流動限界)를 측정(測定)하는 방법(方法)을 시험(試驗)하여 다음과 같은 결론(結論)을 얻었다. 1) 화강암질풍화토(花崗岩質風化土)의 유동한계(流動限界)는 입도분포(粒度分布), 퐁화도(風化度) 및 유색광물함량(有色鑛物含量)에 영향(影響)되므로 유동(流動) Table에 의한 유동한계시험법(流動限界試驗法)을 제정(制定)할 때는 최대입경(最大粒徑)이 규정(規定)되어야 할 것으로 생각된다. 2) 유동(流動) Table의 낙하회수(落下回數)를 10회(回)로 하여 유동고(流動高)와 유동폭(流動幅)이 1cm일 때의 함수비(含水比)의 평균치(平均値)를 유동한계(流動限界)로 택(擇)하면 Slump시험(試驗)에서 구(求)한 유동한계(流動限界)보다 약간 작은 값으로 되며 대략(大略) 10%오차한계선내(誤差限界線內)에 속(屬)했다. 3) 유동폭(流動幅)과 함수비(含水比) 및 유동고(流動高)와 함수비(含水比)의 관계곡선(關係曲線)은 유사(類似)한 변화(變化)를 나타내고 반대수용선(半對數用線)에 도시(圖示)하면 액성한계시험(液性限界試驗)에서와 같이 직선관계(直線關係)를 나타냈다. 4) Slump시험(試驗)에 비(比)하여 조작(操作)이 간편(簡便)하고 개인적(個人的)인 오차(誤差)가 작으며 유동폭(流動福)과 유동고(流動高)를 동시측정(同時測定)하여 시험오차(試驗誤差)가 작은 것으로 공학적(工學的) 성질(性質)을 판단(判斷)하는 자료(資料)로 사용(使用)될 수 있는 것으로 생각된다.

• Advances in concrete construction
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• 제7권2호
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• pp.97-105
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• 2019

In this paper, the workability and static stability were evaluated using a proposed test method. Workability and static stability represent a key property of self-compacting concrete (SCC) in fresh state. A number of standardized test methods were developed to assess these properties. However, no accelerated test method reliably predicts both workability and static stability of SCC. In the present work, a modified K-slump test method was developed to evaluate workability and static stability of SCC. In order to take implicit mixture variations of SCC constituents that can affect fresh SCC properties, a central composite design was adopted to highlight the effect of gravel to sand ratio (G/S), gravel 3/8 to gravel 8/15 ratio (G1/G2), water to cement ratio (W/C), marble powder to cement ratio (MP/C) and superplasticizer content (SP) on workability measured with slump and flow time (T50) tests and static stability measured with sieve stability test (Pi), segregation test index (SSI), Penetration test (Pd) and the proposed K-slump test (Km). The obtained results show that G/S ratio close to 1 and G1/G2 ratio close to 60% can be considered as optimal values to achieve a good workability while ensuring a sufficient static stability of SCC. Acceptable relationships were obtained between Slump flow, Pi, Pd and Km. Results show that the proposed K-slump test allow to assess both workability and static stability of fresh SCC mixtures.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1995년도 봄 학술발표회 논문집
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• pp.14-17
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• 1995

This study is designed for producing and analyzing the structure application properties of the ready mixed concrete of specified concrete strength about 400kg/$\textrm{cm}^2$ in the batcher plant. And this part is designed for analyzing to the slump, slump flow, air content and unit weight in fresh state. By the test results of fresh concrete state, the slump, slump flow and air content are decreased, but unit weight is increased while open time is passed.

• 한국농공학회:학술대회논문집
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• 한국농공학회 2002년도 학술발표회 발표논문집
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• pp.185-188
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• 2002

This study is performed to examine the engineering properties of polyprofilene fiber reinforced high flowable concrete. For the estimation of the flow ability and filling ability, the slump flow, box height difference and L-shape filling appearence are measured and compared. The test result shows that the slump flow and L-shape filling appearence is decreased with increase containing polyprofilene fiber and box height difference is increased with increase containing polyprofilene fiber. Also, compressive strength is decreased with increase containing polyprofilene fiber.