• Journal of the Korean GEO-environmental Society
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• v.10 no.4
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• pp.25-31
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• 2009

In this study, the problem of existing soil pavement is a long-term durability lack and crack occurrence. It complements in order to develop the environmental soil pavement material which composites readily blended mineral binder of liquid and decomposed granite soils. It was estimated optimal mixture proportion for unconfined compressive strength, permeability, $Cr^{6+}$detection test, SEM test with age, freezing and thawing test. It resulted mixture proportion of powder types mineral binder for rates of cement : fly ash : plaster was optimal rates of 50 : 33 : 7, and $Cr^{6+}$detection test as a result was a slight production. SEM test with 3days as a result was made Ettringite. It was found that this material was early development of early-strength for chemical. This study indicated that it will execute field appliciability Evaluation test, examination of soil pavement method with decomposed granite soils and mineral binder.

• Proceedings of the KAIS Fall Conference
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• 2009.05a
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• pp.372-375
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• 2009

반도체 봉지재란 실리콘 칩, 골드와이어, 리드프레임 등의 반도체 소지를 열, 수분, 충격으로부터 보호하기 위해 밀봉하는 재료로서 EMC(Epoxy Moding Compound)가 가장 많이 쓰인다. EMC는 기계적, 전기적 성능향상을 위한 무기재료로 실리카(Silica), 열에 의해 경화되어 3차원 경화구조를 형성하는 에폭시수지, 빠른 경화특성을 부여하기 위한 경화제로서의 페놀수지, 유기재료와 무기재료 사이의 결합력을 높이기 위해 커플링제, 카본블랙, 이형성 확보를 위한 왁스(Wax), 착색제(Colorant), 난연제(Flame Retardant)등의 첨가제로 구성되는 복합소재로써 본 연구에서는 에폭시의 유형에 따른 용융 실리카를 주충진재로 하여 각각의 봉지재의 첨가제를 기준으로 할 때 다양한 형태의 친환경 비할로겐계 반응형 난연제를 합성하는 기술을 개발하고 비 할로겐계 및 Sb 계 첨가형 난연제의 혼용 배합을 통해 친환경 EMC용 난연제의 제조기술을 개발하였다. 이들 EMC의 요구특성은 요구특성은 외부환경으로부터 칩 보호, 칩을 전기적으로 절연특성 유지, 칩의 작동시 발생되는 열의 효과적인 방출 특성 유지, 실장(Board Mounting)의 간편성 특성을 확보해야 하는 특성을 지니고 있어 이들 요구특성에 적합한 특성조사가 함께 이루어졌다.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2023.05a
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• pp.411-412
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• 2023

The purpose of this research and development is to develop a structure module that improves the efficiency and constructability of the layout structure as well as the design development of rainwater permeable storage tank blocks using inorganic binders and aggregates with the aim of reducing greenhouse gas (CO₂) with eco-friendly materials. In addition, for the efficient response to flooding of the developed permeable storage structure, we present a technical solution for combining drone mapping technology and flood monitoring technology that can analyze topographical factors in detail.

• Journal of the Korea Concrete Institute
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• v.25 no.3
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• pp.261-269
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• 2013

In this study, it was developed eco-friendly inorganic binding material concrete using ground granulated blast furnace slag and alkali activator (water glass, sodium hydroxides). Eight reinforced concrete beam using inoganic binding material concrete were constructed and tested under monotonic loading. The major variables were mixture ratio of alkali activator, type of admixture and admixture. Experimental programs were carried out to improve and evaluate the flexural performance of such test specimens, such as the load-displacement, the failure mode, the maximum load carrying capacity, and ductility capacity. All the specimens were modeled in scale-down size. The eco-friendly concrete using inorganic binding material encouraged alkali activation reaction was rapidly hardening speed and showed possibility as a high strength concrete. Also, the RC beams using new materials showed similar behavior and failed similarly with RC beam used portland cement. It is thought that eco-friendly inorganic binding material concrete can be used with construction material and product as a basic research to replace cement concrete. If there is application to structures in PC member as well as production of 2nd concrete product, it could be improved the productivity and reduction of construction duration etc.