• Proceedings of the Korean Institute of Building Construction Conference
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• 2011.11a
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• pp.47-48
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• 2011

According to Bali Roadmap, Korea is also included in nations with a duty to reduce greenhouse gas. This study aims to draw proper Si/Al ratio by analyzing flowing and strength properties as the 4-component low carbon inorganic composite to reduce the use of cement and discarded polysilicon sludge. As the result, when Si/Al ratio is 4, the highest strength was found.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2016.10a
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• pp.104-105
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• 2016

From the Industrial Revolution by past to the present, Carbon emission quantity increase rapidly around the globe. Depending on this status, Also global warming are accelerated rapidly, in order to solve this status, the Climatic Change Convention is held now on. So, On this study, Utilizing the BFS, HFA, DS that we get the basic data of the cementless paste.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2017.05a
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• pp.173-174
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• 2017

Recently, many experiments using industrial by-products have been going on in Korea and abroad. Most of the studies on blast furnace slag and fly ash have been conducted, and the blast furnace slag based two and three component experiments have been conducted in many places. Therefore, this study is an additional study of research using polysilicon sludge and paper ash, which is a study using existing industrial by-products based on blast furnace slag, as strength properties of alkali activator according to kind and mixing ratio and to obtain basic data do.

• Proceedings of the Korea Concrete Institute Conference
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• 1997.10a
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• pp.785-790
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• 1997

In domestic, it is not a little results to use natural mineral, stone and sludge as a construction materials. Accordingly, it is required to study for higher application from of resources these materials in its economic and environmental aspects. So, the purpose of this study is to develop the excellent construction materials, a as compare with existing floor materials in material capacity and economic aspects, using natural zeolite, stone dust and sludge. In this viewpoint, this paper investigated to the required capacity such as, compressive strength, bending strength and absorption according to experiment.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2014.11a
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• pp.171-172
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• 2014

This is an experimental study on manufacturing of non-cement matrix. Materials like cement and blowing agent in foamed concrete is replaced by by-products from blast furnace slag and paper ash. Sample 43-PS-1 with density showed lowest. The compressive strength test result, showed a similar trend with density. And it showed that compressive strength of the 40-PS-1 was highest.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2021.05a
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• pp.327-328
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• 2021

In the manufacturing process of ready-mixed concrete, quantity management directly affects the workability and strength of concrete. Therefore, water quantity is the most important management factor for water quality control of ready-mixed concrete. It can be said that the number of unit water in the mix design, the water quantity due to the surface water contained in the aggregate used, and the water quantity taking into account the concentration of sludge contained in the recycling water when using the recycling water are factors that affect the quantity management of ready-mixed concrete. In this study, as a stable quality control method of ready-mixed concrete, a quantity management method by aggregate surface water and a sludge concentration management method according to the use of recycling water were proposed. Thus, we tried to suggest an efficient quantity management method for stabilizing the quality of ready-mixed concrete.

• Journal of Korean Society on Water Environment
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• v.20 no.5
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• pp.480-487
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• 2004

This study was conducted to find the effect of electron acceptors on the formation of granular sludge by using four different types of electron acceptors. The phosphorous uptake, denitrification, and sulfate reduction in anoxic modes were simultaneously occured because of the presence of the polyphosphate accumultating organism(PAO) that utilize nitrate and sulfate as an electron acceptor in the anoxic zone. Denitrirying phosphorous removal bacteria(DPB) was enriched under anaerobic/anoxic/aerobic condition with a nitrate as an electron acceptor, and desulfating phosphorous removal bacteria(DSPB) was enriched under anaerobic/anoxic/aerobic condition with a sulfate as an electron acceptor. Polyphosphate accumulating organism(PAO) were enriched in the anaerobic/aerobic SBR. PAO took up acetate faster than DPB and DSPB during the aerobic phase. The sludge with nitrate and sulfate as an electron acceptors grew as a granules which possessed high activity and good settleability. In the anaerobic/aerobic modes, typical floccular growth was observed. In the result of bench-scale experiment, simultaneous reactions of phosphorus uptake, denitrification and sulfate reduction were observed under anoxic condition with nitrate and sulfate as an electron acceptors. These results demonstrated that the anaerobic/anoxic modes with nitrate and sulfate as an electron acceptors played an important role in the formation of the sludge granulation.

• Journal of the Korea Institute of Building Construction
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• v.14 no.3
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• pp.230-236
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• 2014

This study was carried out to investigate the manufacturability of artificial lightweight aggregate as a way to recycle basalt powder sludge, which is a waste produced during the manufacturing process of basalt in Jeju. Powdered waste glasses and calcium carbonate are used to improve the characteristics of manufactured artificial lightweight aggregate. Especially, considering the complex factors of basalt powder sludge, powdered waste glasses, and sintering method, the amount of calcium carbonate is appropriate at the 9 wt.% in order to improve the intumescent of lightweight aggregate. Also, the amount of powdered waste glasses is effective with using less than 50 wt.% and applying the direct sintering method at the same time on decreasing the absorption of lightweight aggregate. Furthermore, in order to manufacture artificial lightweight aggregate of high quality with a low specific gravity and low water absorption, it is considered to be more effective to apply the direct sintering method after the surface of artificial lightweight aggregate is covered with powdered waste glasses.

• Proceedings of the Korea Concrete Institute Conference
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• 1999.04a
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• pp.599-604
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• 1999

In recent years, problems of industrial solid wastes appear to be kind of national crises, caused by a sudden increase in their quantities, lack of disposal technique, and public discontent in installing plants for their disposal. This study is designed to investigate that pozzolana-based materials, such as blast furnace slag, fly-ash, paper sludge-ash, which are produced from industries as solid wastes, can be used as construction materials. The variations of concrete strength in function of compositional differences of raw materials including the wastes are studied experimentally. As a result, we find out that the blast furnace slag, the fly-ash, and the paper sludge-ash can be recycled as useful resources for replacement of cements by adjusting their substitution ratio.

• Journal of Environmental Health Sciences
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• v.30 no.2
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• pp.167-172
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• 2004

In this study, we carried out the research for the recycling potential of the dyeing wastewater treatment sludges as construction materials. The incineration ash of sludges were solidified as interlocking block in condition of sludge/cement ratio 2.5%, 5.0% and 10%, respectively. Those interlocking blocks were cured for 3days, 7days and 28days in ambient air condition, respectively. The results of this research were summarized as follows: The dyeing wastewater treatment sludges was below the Korea Leaching Limit. After incineration, the ash was manufactured as interlocking block. Bendable strength over 50kg$_{f}$/$\textrm{cm}^2$ suitable for interlocking block was obtained only when the sample was cured for 7days at sludge/cement ratio 2.5% and 5.0%. Hygroscopic ratio of interlocking block was above the Korea Industry Standard. We think that recycling of the incineration ash from dyeing wastewater treatment sludges to interlocking block will have high potential possibility.y.