• Magazine of the Korean Society of Agricultural Engineers
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• v.42
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• pp.78-84
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• 2000

Permeable polymer concrete can be applied to roads, sidewalks, river embankment, drain pipes, conduits, retaining walls, yards, parking lots, plazas, interlocking blocks, etc. This study is to explore a possibility of utilizing industrial by-products, a blast furnace slag and a fly ash, as fillers for permeable polymer concrete. Different mixing proportions are tried to find an optimum mixing proportion of permeable polymer concrete. The tests are carried out at 20$\pm$1$^{\circ}C$ and 60$\pm$2$^{\circ}C$ relative humidity. At 7 days of curing, compressive, flexural and splitting tensile strengths and water permeability ranged between 239~285kgf/$\textrm{cm}^2$, 107~133kgf/$\textrm{cm}^2$, 37~46kgf/$\textrm{cm}^2$ and 4.612~5.913$\ell$/$\textrm{cm}^2$/h, respectively. It is concluded that the blast furnace slag and fly ash can be used in permeable polymer concrete.

• Proceedings of the Korea Concrete Institute Conference
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• 2005.05b
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• pp.381-384
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• 2005

The purpose of this study reutilization of waste fine tailing (FT) as admixture for cement and concrete. Various admixtures were made of Fine tailings and 2 Types of OPC, fly-ash and blast furnace slag. Cement mortars and concrete with FT are tested for fluidity and compressive strength. Also, the hydration reactivity of cement mortar with FT was examined by XRD and SEM morphology analysis. This work showed that the waste fine tailing could be effectively utilized as replacement materials of cement without any decrease in the strength if we can control the blaine of materials like cement, blast furnace slag and fly ash.

• Journal of the Korea Institute of Building Construction
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• v.3 no.3
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• pp.73-81
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• 2003

In this paper, salt damage resistance of high durable concrete was tested. High durable concrete was made by using low water cement ratio, chemical admixture called super-durable admixture and mineral admixtures such as fly-ash, ground granulated blast-furnace slag, silica fume. Two kinds of salt damage resistance test were carried out. One method is chloride ion penetration test(ASTM C1202), and the other one is depth of chloride penetration test in saline solution. Test results were as followers: 1) The depth of chloride ion penetration increased exponentially as water cement ratio was increased and time passed. 2) Super-durable admixture had little effect on the improvement of salt damage resistance of concrete. 3) Silica fume and ground granulated blast-furnace slag were effective on salt damage resistance because of pozzolanic reaction, but fly-ash had a little effect.

• Journal of the Korea Institute of Building Construction
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• v.8 no.5
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• pp.119-125
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• 2008

In this paper, the estimation of super retarding concrete incorporating mineral admixtures at the same time including fly ash(FA), blast furnace slag(BS) are studied based on maturity method. The setting time was retarded, as super retarding agent contents increase and curing temperature decreases. In addition, apparent activation energy by Arrhenius function was ranged from $24\sim35$ KJ/mol with slightly difference along with mixture proportion. This value is smaller than existing value $30\sim50$ KJ/mol. Based on strength development estimation. it exhibited comparable relativity between prediction value and measurement value. Therefore, this study provided effective strength development prediction value with super retarding agent contents and mineral admixture combination. Strength development prediction equation provided herein is possibly valid for estimating accurate strength development of the super retarding concrete at the job site.

• Proceedings of the Korea Concrete Institute Conference
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• 1991.10a
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• pp.15-20
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• 1991

High-strength concrete were produced with super-plasticizer, silica fume, fly ash and blast furnace slag powder. Topics investigated inclued mix proportion, and effects of unit weight of binder, W/C ratio, additive type on the physical properties of high-strength concrete. As the result, at 20% of silica fume, unit weight of binder 700kg/$\textrm{m}^3$ and W/C=0.24, 28days compressive strength of concrete was over 1,000kgf/$\textrm{cm}^2$. And in cases of blending with silica fume 10% and fly ash or slag 10%, it was able to produce economical high-strength concrete with 28 days strength similar to silica fume 20% only, and higher strength after 90days.

• Proceedings of the Korea Concrete Institute Conference
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• 2004.11a
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• pp.297-300
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• 2004

The purpose of this study reutilization of waste fine tailing as admixture for cement. We observe tailing's basic properties such as shape, physical and chemical basic features. Also, various admixtures were made of 2 Types of tailings, OPC, fly-ash and blast furnace slag. The basic properties of the cement mortars incorporation with these admixtures were examined and analyzed under a verity of experimental conditions. This work showed that the tailing separated coarse materials could be effectively utilized as replacement materials of cement without any decrease in the strength if we can control the blaine of materials like OPC, slag and fly ash.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2013.11a
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• pp.158-159
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• 2013

In this study, effects of supplementary cementitious materials(fly ash, blast furnace slag and waste glass) on drying shrinkage of cement mortar were compared and evaluated. The results showed drying shrinkage of cement mortar using blast furnace slag and waste glass is larger than shrinkage due to capillary pressure, while using fly ash is smaller.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2013.11a
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• pp.154-155
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• 2013

The aim of this work is to have a better knowledge of reactions that take place in a cement paste, blast furnace slag mixed cement paste and fly ash mixed cement paste and know about the change in chemical components exposed to elevated temperature. The results show that the dehydration reactions appeared differently in the each admixture mixed cement paste and can be used as tracers for determining the temperature history of concrete after a fire exposure.

• Journal of the Korean Ceramic Society
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• v.52 no.2
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• pp.150-153
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• 2015

Recently, research on geopolymeric concrete that does not use cement as a binder has been actively investigated. Geopolymeric concrete is cement-free concrete. Masato, ocher and/or soil has been solidified into geopolymeric concrete by the reaction of specifically modified silicate as an alkali activator and inorganic binding materials such as blast furnace slag, fly ash or meta-kaolin, which is cured at room temperature to exhibit high compressive strengths. Based on the results, this study shows how geopolymeric concrete that uses specifically modified silicate and inorganic binding materials is implemented as eco-cement with no cement.

• 한국연소학회:학술대회논문집
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• 2013.06a
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• pp.65-68
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• 2013

In a syngas cooling system of coal gasification process, fly slag carried by syngas deposit on the surface of heat exchanger. The deposited materials form a fouling layer with several millimeters thickness, disturbing heat transfer between steam and syngas. This study investigates flow and heat transfer characteristics of syngas in helical coil heat exchanger using computational fluid dynamics under clean and fouled surface condition. Process model were also designed and its results are in good agreement with CFD results.