• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2005년도 춘계 학술기술논문발표대회 논문집
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• pp.165-169
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• 2005

The fire damage of building wouid effect on the safety of structure. When the reinforced concrete structure is heated by high temperature due to the fire, the structural resisting-force will be decreased. In a way, it is a requirement to use high strength concrete for high rise building. Particularly, fire resistance properties of high-strength concrete is more important than normal strength concretes. The fire outbreak of a high strength concrete by sudden temperature rise is a main problem, and causes crack by thermal stress, loading to the deterioration of the durability. In this study, normal and high strength mortar were exposed to a high temperature environment. And than fundamental data for the character change of concrete heated highly were presented by measuring compressive strength of concrete with polypropylene and vinylon fiber, before and after heating. As the results, it is proven that high strength mortar with polypropylene and vinylon fiber for prevents deterioration of durability by fiber.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2017년도 추계 학술논문 발표대회
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• pp.100-101
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• 2017

LEFC(Light Emotion Friendly Conceret) was developed in Korea with demands of esthentic requirements in line with the recent developmental trend of concrete technology. The LEFC is made by inserting transparent transparent rods, and this forms a heterogeneous structure in the concrete matrix causing the LEFC substrate to crack due low adhesion between the rod and the cement. In this study, as a way to strengthen the bonding to the rod inserted in the LEFC, high strength vinylon fibers of varying mixture ratios were applied and physical properties were tested accordingly. To study the effect of different spacing of the bars on the LEFC, physical property testing was conducted on respective specimens with two different diameters (5mm, 10mm) inserted in different intervals of spacing (10mm, 15mm, and 20mm).

• 한국염색가공학회지
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• 제19권5호
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• pp.17-23
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• 2007

As polyvinyl alcohol(PVA) filament yarn is commercially used in many fields due to its high strength and modulus properties. This research was carried out to study the dyeing behavior of PVA and to find out appropriate dye for better dyeing. As the dyeing behavior of PVA fiber is similar to cellulose due to the same functional group, reactive and vat dyes were selected for the dyeing. Color strength of PVA fibers treated with vat dyes was found to be better than those with reactive dyes, because of the low fixation of reactive dye on fibers. Most of the reactive dye may became hydrolyzed, and flushed away with water in washing. Colorfastness to laundering was shown to be very high for both of the reactive-dyed and vat-dyed PVA fibers.

• 공업화학
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• 제7권3호
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• pp.424-432
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• 1996

열가소성 고분자 복합재료 개발을 위하여 매트릭스수지로는 폴리프로필렌(PPF) 섬유를 사용하고 유기계 강화섬유로 비닐론(VF), 아라미드(KF) 및 나일론(PAF) 섬유 등을 사용하여 복합매트를 얻은다음 압축 성형하여 고분자 복합재료를 제조하였다. 제조한 고분자 복합재료의 충격 특성 및 형태학적 특성 등을 측정하였다. 아이조드충격강도는 VF/PP가 크며, 고속충격특성은 KF/PP계가 약간 크게 나타났다. Ductility Index(Dl)는 VF/PP>KF/PP>PAF/PP 순으로 나타났으며 VF/PP의 최대 DI값은 섬유중량분율이 20%일 때 2.43이었다. 유기섬유 충전률은 20~30%가 최적값이었으며 SEM 관찰로 섬유분산상태 및 배향성은 양호함을 확인하였다. 결론적으로 VF/PP 복합재료가 KF/PP 및 PAF/PP 복합재료에 비해 계면접착력이 가장 우수하였다.