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유기질 섬유 종류가 콘크리트의 공학적 특성에 미치는 영향
신현섭 ( Hyun-sup Shin ),김광련 ( Kwang-ryeon Kim ),이건철 ( Gun-cheol Lee ),김병기 ( Byung-gi Kim ),한천구 ( Cheon-goo Han ) 한국건축시공학회 2006 한국건축시공학회 학술발표대회 논문집 Vol.6 No.1
This study investigated influence of organic fiber type and contents on engineering properties of concrete. Test showed that increase of fiber contents decreased fluidity of fresh concrete and it was even worse in concrete adding cellulose fiber. It is decided that containing more than proper level of fiber should be considered. In addition, concrete adding more fiber, nylon and cellulose, resulted in increase of air content but it was satisfied in aimed value. Bleeding capacity of concrete containing more fiber significantly declined and setting time of what was also slightly retarded. For the properties of strength, both compressive and tensile strength of fiber containing concrete were indicated at similar value to control concrete. However, it is clear that if those concrete containing fiber revised the value of increased air contents at fresh state, the strength value of that would be slightly increased.
신현섭 ( Shin Hyun-sup ),김종백 ( Kim Jong-back ),김광련 ( Kim Kwang-ryeon ),한천구 ( Han Cheon-goo ) 한국구조물진단유지관리공학회 2006 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.10 No.2
This study investigates engineering properties of concrete containing nylon(NY) and cellulose(CEL) fiber. Test showed that increase of fiber adding ratio decreased fluidity, especially for CEL fiber, and it slightly increased air content satisfying target range. As for the properties of hardened concrete, most specimens containing NY or CEL fiber exhibited similar performance to control concrete in the values of compressive, tensile and flexural strength. However, even if it revised the strength considering increase of air content, those specimens adding fibers would have slightly inclined the value, compared with that of control. In addition, as for the impact strength of specimens, the NY specimen showed higher than that of CEL, especially for adding 0.6kg/m<sup>3</sup> of NY fiber. Adding fiber did not affect length change ratio of specimens, while it showed even higher value than that of control, when added more than 0.9kg/m<sup>3</sup> of NY fiber.
신현섭(Shin Hyun-Sup),김종백(Kim Jong-Back),김광련(Kim Kwang-Ryeon),한천구(Han Cheon-Goo) 한국구조물진단유지관리학회 2006 한국구조물진단학회 학술발표회논문집 Vol.10 No.2
This study investigates engineering properties of concrete containing nylon(NY) and cellulose(CEL) fiber. Test showed that increase of fiber adding ratio decreased fluidity, especially for CEL fiber, and it slightly increased air content satisfying target range. As for the properties of hardened concrete, most specimens containing NY or CEL fiber exhibited similar performance to control concrete in the values of compressive, tensile and flexural strength. However, even if it revised the strength considering increase of air content, those specimens adding fibers would have slightly inclined the value, compared with that of control. In addition, as for the impact strength of specimens, the NY specimen showed higher than that of CEL, especially for adding 0.6㎏/㎥ of NY fiber. Adding fiber did not affect length change ratio of specimens, while it showed even higher value than that of control, when added more than 0.9㎏/㎥ of NY fiber.
나일론 및 셀룰로오스 섬유가 콘크리트의 역학적 특성에 미치는 영향
신현섭 ( Shin Hyun-sup ),박용규 ( Park Yong-kyu ),김광련 ( Kim Kwang-ryeon ),이건철 ( Lee Gun-cheol ),김병기 ( Kim Byung-gi ),한천구 ( Han Cheon-goo ) 한국구조물진단유지관리공학회 2006 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.10 No.1
This study investigated the influence of nylon(NY) and cellulose(CL) fiber on the fundamental and mechanical properties of concrete. Test showed that increase of NY and CL fiber contents proportionally decreased concrete fluidity. It is found that concrete containing more than proper amounts of fiber should be reconsidered. Although adding higher ratio of fiber caused slightly increased air content, all specimens were satisfied in aimed value. In addition, using both NY and CL fiber resulted in higher value of bleeding capacity, and retardation of setting time. For the properties of strength, both compressive and tensile strength was indicated at similar value to control concrete. However, it is clear that if those concrete containing fiber revised the value of increased air contents at fresh state, the strength value of that would be slightly increased. Flexural strength of concrete containing NY fiber was indicated at higher value than CL fiber. Concrete adding 0.6kg/m3 of fiber highly reduced plastic shrinkage crack area and showed the most favorable impact resistance performance.