• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2009년도 춘계 학술대회 제21권1호
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• pp.339-340
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• 2009

본 연구에서는 습식비중분리시스템에서 생산된 순환모래의 생산단계별 모르타르의 품질특성을 검토한 결과 습식비중분리시스템을 거친 후 단계의 고품질 순환모래(RS-IV)가 품질성능이 크게 개선되는 경향을 나타내었다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2009년도 춘계 학술대회 제21권1호
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• pp.403-404
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• 2009

본 연구는 CLSM(Controled Low-Strength Materials)의 고유동화에 필요한 분체량과 경제적을 고려하기 위하여 산업부산물인 Reject Ash의 사용량 변화와 순환모래(고품질, 저품질)와 부순모래, 공기량 변화에 따른 CLSM의 물리적 특성을 분석하여 고유동 CLSM에서의 Reject Ash와 순환모래의 활용성을 검토하였다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2008년도 춘계 학술논문 발표대회
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• pp.103-107
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• 2008

This study was to execute the experiment for analyzing the quality characteristics of mortar by type of recycled sand by using the recycled sand produced by the manufacturing system by wet gravity separation in order to develop the removal device of impurities for the production of high-quality recycled sand. As a result, this study has sown that the mortar using the high-quality recycled sand through the manufacturing system by wet gravity separation in the fluidity property, strength property, and shrinkage property largely, compared with the mortar using low-quality recycled sand that not passed the device of sand flux. There was a tendency similar to the plane mortar. In conclusion, it was considered as various quality performances of the recycled sand were improved through the production stage of prototype.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2009년도 춘계 학술논문 발표대회 학계
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• pp.81-85
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• 2009

This study was to execute the basic property evaluation of recycled sand which produced by the sand flux device in order to evaluate the performance of differences between small large sand flux device. As a result, this study has found out that the recycled sand after passing the sand flux device had excellent quality characteristics compared with the One before passing the device. In additional experiment On the basic material properties, this study showed a tendency to improve the quality and performance significantly in case of fineness modulus, absolute surface dried density, 0.08mm sieve throughput, volume of clay lumps, and content of organic foreign matter. In conclusion, it was considered as various quality performances of recycled sand were improved through the production stage of prototype.

• 한국건설순환자원학회논문집
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• 제4권2호
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• pp.74-84
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• 2009

본 연구에서는 생산방식에 따라 생산된 고품질 순환모래의 기초물성평가를 통한 품질특성을 실험 실증적으로 평가함으로서, 최종 생산된 순환모래에 대한 성능을 평가하고, 목표 품질의 달성과 향후 성능 보완 및 활용의 확대, 고부가가치 창출을 위한 기초자료를 제시하고자 하였으며, 본 연구의 기초물성 실험결과, 직렬식 건식생산시스템과 병렬식, 소용량 습식생산시스템과 대용량을 거쳐 최종 생산된 순환모래인 RS-IV의 경우 절대건조밀도, 0.08mm체 통과량, 점토덩어리량, 유기이물질함유량에서 KS F 2573(순환잔골재) 기준에 만족하였으나, 흡수율에서는 대 소용량 습식생산시스템을 거쳐 최종 생산된 RS-IV만이 KS F 2573 기준치 5% 이하에 만족하였다. 흡수율의 품질 개선율 경우, 직렬식 건식생산시스템(7.13%), 병렬식(19.89%), 소용량 습식생산시스템(27.41%), 대용량(54.56%), 0.08mm체 통과량 경우, 직렬식 건식생산시스템(22.22%), 병렬식(39.92%), 소용량 습식생산시스템(91.89%), 대용량(98.16%), 점토덩어리량 경우, 직렬식 건식생산시스템(50.34%), 병렬식(76.77%), 소용량 습식생산시스템(98.60%), 대용량(99.32%)등으로 직렬식 건식생산시스템에 비하여 병렬식, 소용량 습식생산시스템에 비하여 대용량, 건식생산시스템에 비하여 습식생산시스템의 품질 개선율이 우수한 것으로 나타났다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2007년도 추계 학술논문 발표대회
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• pp.23-26
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• 2007

In this study, recently it is urgently required that demolition waste concrete has to be recycled on the construction because urban development is accelerated and redevelopment project is rapidly expanded, production quantity of construction and demolition waste concrete is being increased. On the other hand, it has to be solved urgently the unbalance of demand and supply about the fine aggregate because the sea sand is restricted by exhaustion of river sand and intensification of environment influence evaluation. Therefore, the purpose of the study was to show the performance of the apparatus developed by the study and to propose the direction of the optimum operating conditions by having an experimental and positive evaluation about quality of recycled sand produced to develop a separating and selecting device of impurities for recycling of construction wastes which can have a bigger improvement of economical efficiency, productivity, environmental property and quality through a basic property of matter of recycled sand by each operating condition of sand flux in comparison with the existing production system of recycled sand.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2005년도 봄학술 발표회 논문집(II)
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• pp.145-148
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• 2005

Recently, because of the increase of management system about waste concrete and the policy of recycling promotion of government, the use of recycled aggregate is rapidly increasing nowadays. But, due to the poverty of quality and the lack of KS standard, the use of recycled fine aggregate is not active. Therefore, it was intended to compare and investigate effects which types of sand and replacement ratio of recycled fine aggregate. As the result of this study, in the case of the recycled replacement ratio of 25$\%$, fresh and engineering properties were higher than those of natural fing aggregates with the exception of durability. Also, because quality according to types of fine aggregate shows the difference between various properties, it was considered that the profound study for this result would be necessary.