• 한국건축시공학회지
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• 제8권6호
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• pp.83-89
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• 2008

The stone sludge produced during the manufacturing process of stone blocks is considered as one of industrial waste materials. This stone sludge are managed to either burying under the ground or stacking in the yard, but this disposal process is required an extra costs. The stone sludge disposal like burying or stacking also cause environmental pollutions such as ground pollution and subterranean water pollution. Thus, this study was conducted to explore the possibility of recycling of stone dust sludge as a concrete mixing material in order to extend recycling methods and to solve the shortage of aggregate caused by recently increased demand in construction. Based on the experiment results on various ratios of cement to stone sludge content, the compressive strengths of concrete were recorded in the range of $20{\sim}30N/mm2$. The results did not show any decrease in compressive strength due to the stone dust content. It can be concluded that the stone sludge produced by stone block manufacturing can be sufficiently recycled as one of concrete mixing materials in the aspect of compressive strength.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2005년도 춘계 학술기술논문발표대회 논문집
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• pp.85-88
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• 2005

The stone powder sludge occurred at aggregate production process is classified the specified waste, so it is disposed by appropriate method. But the problems of the shortage of the disposal-site, the environment pollution, and the increase of disposal cost can be occurred in handling process, therefore the stone powder sludge is required the development of recycling technique. The stone powder sludge includes SiO2 of about $63\%$. This characteristic is important at the production of hardened specimens under condition of hydro-thermal reaction. In this study, we investigated the strength properties of concrete used stone powder sludge as siliceous material. The test results under condition of hydro-thermal reaction shows the two main facts. The first, the stone powder sludge is affected to fluidity because the surface of the stone powder sludge has characteristics of flakily and angularity. The second, weight content of the stone powder sludge, is not effective factor to the properties of strength.

• 한국건축시공학회지
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• 제17권1호
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• pp.111-117
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• 2017

Stone powder sludge is a byproduct of the crushed aggregate industry, and most of it is dumped with soil in landfills. The disposal of stone powder sludge presents a major environmental problem. This paper investigates the effects of stone powder sludge on the fluidity, density, strength and micro-structure properties of AAC(autoclaved aerated concrete) samples. Stone powder sludge was obtained from a crushed aggregate factory in order to investigate its applicability as a substitute for quartz sand in AAC. To determine the properties of the AAC samples produced with stone powder sludge, specimens containing different foam ratios were produced. Flow value, density, compressive strength, tensile strength and flexural strength of the samples were tested, and X-ray diffraction (XRD) was performed. The test results indicated that the compressive strength of AAC specimens (F120) with stone powder sludge was higher than that of AAC specimens (Q120) with quartz sand for same foam ratio of 120%. For all XRD diagrams, a higher number of tobermorite peaks was shown for the F120 sample than for the Q120 sample, which may explain the slightly higher strength gain in the F120 sample.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2009년도 세계 도시지반공학 심포지엄
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• pp.1378-1382
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• 2009

This study is conducted to investigate the possibility of the utilization of the mixed soil formed by mixing stone sludge, bentonite, and residual soil as a soil sealant sustaining both stability and capacity in the barrier system. And the mixed soil formed by mixing stone sludge, river sand is conducted to investigate the possibility of recycle. A series of tests were performed on the mixed soil(stone sludge, bentonite, Cement and residual soil) to evaluate basic properties such as compaction, compressive strength, permeability of these materials. and the stone sludge-river sand mixed soil were performed the discharge capacity tests.

• Architectural research
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• 제12권1호
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• pp.49-55
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• 2010

Stone powder sludge is a by-product of the manufacturing process of crushed sand. Most of it is dumped with soil in landfills, and the disposal of stone powder sludge causes a major environmental problem. This paper investigates the applicability of stone powder sludge in fly ashbased geopolymer. For this, stone powder sludge was used to replace fly ash at a replacement ratio of 50% and 100% by weight. The compressive strength of the samples was measured and scanning electron microscopy/ energy dispersive spectroscopy (SEM/EDS) analysis and X-ray diffraction (XRD) were performed. The test results indicated that the optimum level of the alkali activator ratio ($Na_2SiO_3$/NaOH) for fly ash-based geopolymer using stone powder sludge was 1.5. The strength development is closely related to the NaOH solution concentration. In addition, the compressive strength of the sample cured at $25^{\circ}C$ was significantly improved between 7 days and 28 days, even though the strength of the sample showed the lowest value at 7 days. Microscopy results indicated that a higher proportion of unreacted fly ash spheres remained in the sample with 5M NaOH, and some pores on the surface of the sample were observed.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2006년도 춘계학술논문 발표대회 제6권1호
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• pp.115-118
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• 2006

Nowadays the using of concrete is generalized, and construction material is demanded to be lightweight according to increasing the height and capacity of buildings. Therefore, it needs to develop the products having the great quality and various performance. Extruding concrete panel made of cement, silica source, and fiber, and it is a good lightweight concrete material in durability and thermostable. The silica of important ingredient is natural material with hish SiO2 contents and difficult in supply because of conservation of environment. On the other hand, the stone powder sludge discharged about 20-30% at making process of crushed fine aggregate and it is wasted. The stone powder sludge is valuable instead of silica ole because the stone powder sludge includes water of about 20-60%, SiO2 of about 64% and it has fine particles. This experiment is on the properties of extruding concrete panel using the stone powder sludge use instead of silica. From this experiment, we find that it is possible to replace the silica as stone power sludge up to 50%,

• 한국지반환경공학회 논문집
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• 제13권8호
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• pp.45-55
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• 2012

본 연구는 폐석분의 성토재 활용에 대한 연구로서 폐석분, 화강풍화토, 그리고 폐석분과 화강풍화토의 혼합토에 대해 강도증진의 목적으로 단섬유를 보강한 경우의 강도 특성을 시험적으로 분석한 것이다. 폐석분, 화강풍화토 및 혼합토에 단섬유를 혼합한 경우 단섬유의 함량과 일축압축강도 증가비는 거의 선형적인 증가 경향을 보였으며, 화강풍화토에서 가장 큰 일축압축강도 증가비가 나타났고, 혼합토는 폐석분과 유사한 일축압축강도 증가비를 나타냈다. 전단강도 시험 결과 폐석분을 화강풍화토와 혼합한 혼합토의 경우 단섬유함량에 따른 점착력의 변화는 작았으나, 내부마찰각은 증가하는 추세를 보였으며, 단섬유 함유량 0.75%에서 21%의 내부마찰각 증가효과를 나타냈다. 폐석분 및 화강풍화토에 비교하여 상대적으로 강도정수가 크게 증가하는 경향을 보이고 있어 혼합토에서 단섬유의 보강효과를 기대할 수 있을 것으로 판단된다.

• 한국지반환경공학회 논문집
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• 제23권7호
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• pp.5-10
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• 2022

산업폐기물은 국내외적으로 공간 및 환경적 측면에서 큰 문제가 되고 있다. 따라서 이를 해결하려는 방법으로 페기물 감량화 및 재활용 정책이 실시되고 있다. 산업폐기물인 엔지니어드스톤 슬러지는 엔지니어드스톤 생산 과정에서 발생한다. 엔지니어드스톤 슬러지는 대부분 매립으로 처리되기 때문에 발생량 증가는 매립공간 및 처리비용을 증가시킨다. 그러므로 엔지니어드스톤 슬러지를 자원화 시킬 수 있는 방법이 필요하다. 이에 본 연구에서는 엔지니어드스톤 슬러지에 화강풍화토를 혼합한 혼합 복토재를 매립지의 복토재로서 활용 가능성을 확인하기 위한 목적으로 실내시험(액소성시험, 다짐시험, 일축압축시험, 투수시험)을 수행하였다. 그 결과 엔지니어드스톤 슬러지의 함유량이 62.5% 미만인 엔지니어드스톤 슬러지 혼합 복토재가 매립지의 복토재로 활용할 수 있을 것으로 판단된다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2005년도 봄학술 발표회 논문집(II)
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• pp.409-412
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• 2005

Because the underwater structures are subjected to the deterioration according to use environment, it is necessary to repair and reinforce when the durable performances are considered in structures. In generally, epoxy mortar is used to repair materials of underwater concrete. It is divided epoxy and filler which is organized cement and sand. Cement can be replaced by stone powder sludge in waste because the grading of stone powder sludge in drying state has similar to that of cement. As result of study, it is possible that stone powder sludge can be applied for replacement materials of cement in epoxy mortar, because the strength is not different when filler in epoxy mortar is alternated stone powder sludge.

• 한국건설순환자원학회논문집
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• 제3권2호
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• pp.152-158
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• 2015

본 연구에서는 잔골재의 일부 대체재로 석분슬러지의 활용가능성을 살펴보기 위해서, 석분슬러지 활용 시멘트 모르타르에서 석분슬러지 치환율 변화에 따른 굳지 않은 상태 물성과 강도 변화 실험을 수행하였다. 치환율은 0, 10, 20, 30%를 고려하였으며, 굳지 않은 상태 물성으로는 슬럼프, 공기량, 레올로지 특성을 평가하였으며, 강도는 압축강도 및 휨인장강도를 평가하였다. 그 결과, 슬럼프 및 공기량은 석분슬러지 치환율이 증가함에 따라 감소하는 것으로 나타났으며, 레올로지 특성에서는 치환율 20%까지는 항복응력 및 소성점도 모두 증가하는 것으로 나타났지만, 치환율 30%에서는 20%와 큰 차이가 나지 않았다. 항복응력의 경우 10%에서 20% 사이에서 증가율이 크게 나타났다. 압축강도 및 휨인장강도 결과에서는 석분슬러지 치환율에 따른 강도변화는 크게 나타나지 않았지만, 석분슬러지를 혼입할 경우 초기재령에서는 강도증진 효과가 명확히 나타났으며 28일 재령에서는 석분슬러지를 사용하지 않은 경우와 큰 차이가 없는 것으로 나타났다.