결합재량에 따른 포러스 폴리머 콘크리트의 공극률과 강도 및 식생 블록 내 초기 생장 특성

성찬용,김영익,Sung, Chan-Yong,Kim, Young-Ik 한국농공학회 2010 한국농공학회논문집 Vol.52 No.6

This study was performed to evaluate the void ratio and strength of porous polymer concrete used coarse aggregates and unsaturated polyester resin to find optimum mix design of porous polymer concrete for planting block. Also, this study was performed to evaluate the planting properties of herbaceous plant and cool-season grass in porous polymer blocks based on the experimental results of porous polymer concrete to develop environmentally friendly planting blocks. Tests for the void ratio and compressive strength of porous polymer concrete were performed at the curing age 7 days. Also, kinds of plants such as Tall fescue, Perennial ryegrass, Lespedeza and Alfalfa for planting were applied to porous polymer blocks. Within 6 weeks after seed, initial germination ratio, cover view and growth length for planting blocks were estimated by various methods.

투수성 폴리머 블록 포장에 의한 우수 유출 저감 효과에 관한 실험적 연구

성찬용,김영익,Sung, Chan-Yong,Kim, Young-Ik 한국농공학회 2012 한국농공학회논문집 Vol.54 No.2

Most of the roads are paved with impermeable materials such as asphalt concrete and cement concrete, and in the event of heavy rainfall, rainwater directly flows into river through a drainage hole on the pavement surface. This large quantity of rainwater directly spilled into the river frequently leads to the flooding of urban streams, damaging lowlands and the lower reaches of a river. In recent years there has been a great deal of ongoing research concerning water permeability and drainage in pavements. Accordingly, in this research, a porous polymer concrete was developed for permeable pavement by using unsaturated polyester resin as a binder, recycled aggregate as coarse aggregate, fly ash and blast furnace slag as filler, and its physical and mechanical properties were investigated. Also, 3 types of permeable polymer block by optimum mix design were developed and rainfall runoff reduction effects by permeability pavement using permeable polymer block were analyzed based on hydraulic experimental model. The infiltration volume, infiltration ratio, runoff initial time and runoff volume in permeability pavement with permeable polymer block of $300{\times}300{\times}80$ mm were evaluated for 50, 100 and 200mm/hr rainfall intensity.

폴리프로필렌 섬유보강 환경친화형 포장재료의 개발

성찬용,김영익,Sung, Chan-Yong,Kim, Young-Ik 한국농공학회 2004 한국농공학회논문집 Vol.46 No.1

This study is performed to examine the physical and mechanical properties of eco-concrete using soil, natural coarse aggregate, excellent soil compound and polypropylene fiber. The test result shows that mass loss ratio is decreased with increasing the content of coarse aggregate and excellent soil compound. The compressive and flexural strengths are increased with increasing the content of coarse aggregate, excellent soil compound and polypropylene fiber. The coefficient of permeability is decreased with increasing the content of coarse aggregate and excellent soil compound, but it is increased in 0.2% polypropylene fiber content. The lowest coefficient of permeability is showed in $5.066\times 10^{-9}$cm/s. These eco-concrete can be used for farm road.

재생골재 및 섬유 혼입률에 따른 포장용 투수성 폴리머 콘크리트의 역학적 특성

성찬용,김영익,Sung, Chan-Yong,Kim, Young-Ik 한국농공학회 2010 한국농공학회논문집 Vol.52 No.1

Research on permeable pavement like asphalt and concrete pavement with porous structure has been increasing due to environmental and functional need such as reduction of run off and flood, and increase and purification of underwater resource. This study was performed to evaluate permeability, strengths and durability of permeable polymer concrete (PPC) using recycled aggregate that is obtained from waste concrete. Also, 6mm length of polypropylene fiber was used to increase toughness and interlocking between aggregate and aggregate surrounded by binder. In the test results, regardless of kinds of aggregates and fiber contents, the compressive strength and permeability coefficient of all types of PPC showed the higher than the criterion of porous concrete that is used in permeable pavement in Korea. Also, strengths of PPC with increase polypropylene fiber volume fraction showed slightly increased tendency due to increase binder with increase of fiber volume fraction. The weight reduction ratios for PPC after 300 cycles of freezing and thawing were in the range of 1.6~3.8 % and 2.2~5.6 %, respectively. The weight change ratio was very low regardless of the fiber volume fraction and aggregates. The weight reduction ratios of PPC with fiber and aggregate were in the range of 1.3~2.7 % and 2.2~3.2 % after 13 weeks and was very low regardless of the fiber volume fraction and aggregates.

C_aCO₃와 석분을 혼입한 투수용 폴리머 콘크리트의 공학적 성질

성찬용,송용진,정현정,Sung, Chan Yong,Song, Young Jin,Jung, Hyun Jung 충남대학교 농업과학연구소 1996 농업과학연구 Vol.23 No.1

This study was performed to evaluate the engineering properties of permeable polymer concrete with fillers and unsaturated polyester resin. The following conclusions were drawn. 1. The highest strength was achieved by stone dust filled permeable polymer concrete, it was increased 17% by compressive, 148% by tensile and 188% by bending strength than that of the normal cement concrete, respectively. 2. The static modulus of elasticity was in the range of $1.17{\times}10^5{\sim}1.32{\times}10^5kg/cm^2$, which was approximately 53~56% of that of the normal cement concrete. Stone dust filled permeable polymer concrete was showed relatively higher elastic modulus. The poisson's number of permeable polymer concrete was less than that of the normal cement concrete. 3. The dynamic modulus of elasticity was in the range of $1.3{\times}10^5{\sim}1.5{\times}10^5kg/cm^2$, which was approximately less compared to that of the normal cement concrete. Stone dust filled permeable polymer concrete was showed higher dynamic modulus. The dynamic modulus of elasticity were increased approximately 10~13% than that of the static modulus. 4. The water permeability was in the range of $3.076{\sim}4.390{\ell}/cm^2/h$, and it was largely dependent upon the mix design. These concrete can be used to the structures which need water permeability. 5. The compressive strength, tensile strength, bending strength and elastic modulus were largely showed with the decrease of water permeability. 이 연구는 폴리머와 충전재로 $CaCO_3$와 석분을 혼입한 투수용 폴리머 콘크리트의 공학적 성질을 구명한 것으로서, 이 연구를 통해 얻어진 결과를 요약하면 다음과 같다. 1. 강도는 충전재로 석분을 100% 혼입한 투수용 폴리머 콘크리트에서 가장 크게 나타났으며, 보통 시멘트 콘크리트보다 압축강도에서는 17%, 인장강도에서는 148%, 휨강도에서는 188% 증가되었고, 압축강도에 대한 인장과 휨강도비가 보통 시멘트 콘크리트보다 2.1~2.5배이상 크게 나타나 취성이 크다는 것을 알 수 있었다. 2. 정탄성계수는 $1.17{\times}10^5{\sim}1.32{\times}10^5kg/cm^2$로서 보통 시멘트 콘크리트의 53~56%정도로 변형성이 크게 나타났고, 충전재로는 석분을 100% 혼입한 투수용 폴리머 콘크리트에서 비교적 높은 값을 보였으며, 포아손수는 보통 시멘트 콘크리트보다 작게 나타났다. 3. 동탄성계수는 $1.3{\times}10^5{\sim}1.5{\times}10^5kg/cm^2$로서 보통 시멘트 콘크리트보다 작게 나타났고, 충전재로는 석분을 100% 혼입한 투수용 폴리머 콘크리트에서 비교적 높은 값을 보였으며, 동탄성계수는 정탄성계수보다 10~13%정도 크게 나타났다. 4. 투수량은 $3.076{\sim}4.390{\ell}/cm^2/h$로서 배합설계에 따라 크게 좌우되었으며, 이러한 콘크리트는 투수를 요하는 구조물에 유용하게 이용할 수 있을 것이다. 5. 투수량은 압축강도, 인장강도, 휨강도 및 탄성계수가 증가할수록 감소하였다.

굴 패각 분말을 충전재로 활용한 폴리머 콘크리트의 강도 및 내구 특성

성찬용,김영익,Sung, Chan-Yong,Kim, Young-Ik 한국농공학회 2010 한국농공학회논문집 Vol.52 No.6

This study was performed to evaluate the workability, strengths and durability of polymer concrete using oyster shell that are reclaimed at public shore illegally or leaved on the surroundings of shore to prevent the environmental pollution. We investigated the effect of oyster shell powder (OSP) and $CaCO_3$. on the slump, compressive strength, flexural strength, acid sulfuric and freezing and thawing resistance as a filler of polymer concrete. Modified OSP obtained by crushing oyster shell (less than 0.15 mm size) consists of 60.47 wt% of $SiO_2$ and 39.5 wt% of $CaCO_3$. As a result of slump test by OSP and $CaCO_3$. contents, it is found that slump of specimen used OSP is lower than that used $CaCO_3$. and the more OSP contents are, its slump is increased. Compressive and flexural strength of polymer concrete using OSP are similar or slightly lower than that using $CaCO_3$. In acid sulfuric test for 5 % $H_2SO_4$ and freezing thawing test, regardless of kinds of fillers and contents are not found fatal defects in weight change, falling-off in surface and durability factor.

산업부산물을 혼화재로 사용한 콘크리트의 특성에 관한 실험적 연구

성찬용 ( Sung Chan Young ),조일호 ( Cho Il Ho ),서대석 ( Seo Dae Seuk ),민정기 ( Min Jeong Ki ) 한국농공학회 1999 韓國農工學會誌 : 전원과 자원 Vol.41 No.6

This study is performed to evaluate the properties of concrete using industrial wastes such as fly ash. zeolite powder and blast furnace slag powder. Seven types of concrete mixtures are made in this study. Water-reducing admixture and air entraining agent are used for all mixtures. Test results, the hydration evolution amounts are decreased by 2-31% than that of the normal portland cement and air contents of concrete are decreased by 1-1.5% and compressive strengths are increased by 2-10% at the curing age 28 days than that of the normal portland cement concrete. Accordingly, concrete using industrial wastes will greatly improve the properties of concrete.

솔잎재 콘크리트의 응력-변형과 내산성에 관한 실험적 연구

성찬용 ( Sung Chan Yong ),남기성 ( Nam Ki Sung ),김영익 ( Kim Young Ik ),민정기 ( Min Jeong Ki ) 한국농공학회 1999 韓國農工學會誌 : 전원과 자원 Vol.41 No.5

This study examines the stress-strain and acid-resistance of pine needle ash (PNA) concrete. Materials used for this experiment are PNA, normal portland cement, natural fine and coarse aggregate. Test results show that the highest static modulus of elasticity are achieved by 5% PNA filled PNA concrete. Acid-resistance of PNA concrete is increased with increase of the content of PNA. It is 1.29 times of the normal cement concrete for 5% PNA filled PNA concrete and 2.57 times for 15% PNA filled PNA concrete, based on the elapsed days for 25% mass loss of original mass immersed in the 5% H₂SO₄ solution. Accordingly, PNA concrete will greatly improve the properties of concrete.

패분 콘크리트의 비파괴 특성에 관한 실험적 연구

성찬용 ( Sung Chan Young ),서대석 ( Seo Dae Seuk ),민정기 ( Min Jeong Ki ) 한국농공학회 2000 韓國農工學會誌 : 전원과 자원 Vol.42 No.2

This study is performed to evaluate experimentally the nondestructive properties on the concrete that is treated with crushed oyster shell powder of 0.15mm or smaller in diameter. The ultrasonic pulse velocity of crushed oyster shell concrete(COSC) is in the range of 4.110-4.267m/s, and the dynamic modulus of elasticity of COSC range from 288×10³ to 318×10³kgf/cm². The ultrasonic pulse velocity and dynamic modulus of elasticity are similar to those of normal portland cement concrete. The highest ultrasonic pulse velocity and dynamic modulus of COSC are measured at the 2.5% addition rate by weight of crushed oyster shell powder. The acid-resistance in increased of the content of crushed oyster shell powder. The acid-resistance of COSC with 15% addition rate by weight of crushed oyster shell power is 1.6 times greater than that of normal portland cement concrete. It is concluded that the addition of crushed oyster shell powder to normal portland cement concrete contributed to improve the nondestructive properties of concrete.

단위결합재량 및 골재 크기에 따른 재생 폴리머 콘크리트의 강도 및 내구 특성

성찬용 ( Sung Chan-yong ),김영익 ( Kim Young-ik ),윤준노 ( Youn Joon-no ) 한국농공학회 2009 한국농공학회 학술대회초록집 Vol.2009 No.-

환경문제가 모든 분야에서 심각하게 대두되면서 건설분야에서도 환경부하 저감 및 건설폐기물 재활용 등의 환경개선에 대한 요구가 크게 증가하고 있다. 특히 최근 도시재개발과 건물의 노후화 및 기능저하에 의한 건물의 해체가 증가함에 따라 폐콘크리트를 포함한 각종 건설폐기물이 다량으로 배출되고 있으며, 이를 경제적 및 환경적으로 처리하기 위한 연구가 활발히 진행되고 있다. 따라서 본 연구는 국내에서 생산되고 있는 재생골재를 일정비율로 치환한 재생 폴리머 콘크리트를 개발하여, 단위 결합재량 및 재생골재의 크기에 따른 재생 폴리머 콘크리트의 강도 및 내구 특성을 구명하는데 있다. 재생 폴리머 콘크리트 제조를 위한 결합재는 올소 타입의 불포화 폴리에스터 수지를 사용하였으며, 개시제는 메틸에틸케톤 프록사이드가 55% 함유된 DMP 용액을 사용하였다. 굵은골재로는 5-10, 5-20 및 5-25mm의 쇄석 및 재생 굵은골재를 사용하였으며, 잔골재로는 4.75mm 이하의 천연모래와 재생 잔골재를 사용하였고, 충전재는 탄산칼슘을 사용하였다. 에비실험을 통하여 잔골재에 대한 굵은골재의 비율과 충전재의 사용량을 결정하였으며, 충전재는 재생골재에 따른 특성을 평가하기 위하여 모든 배합에서 동일 중량비를 사용하였다. 또한, 재생 굵은골재와 재생 잔골재의 치환에 따른 재생 폴리머 콘크리트의 특성을 구명하기 위하여 재생 굵은골재와 재생 잔골재를 쇄석 및 천연모래에 대하여 50 및 100% 치환하여 배합하였으며, 단위 결합재량은 9,10 및 11%로 하였다. 압축강도시험 및 휨강도 시험은 KS F 2481 및 KS F 2482에 준하여 재령 7일에 측정하였으며, 초음파진동속도시험은 각주 공시체를 사용하여 BS 4408(콘크리트의 초음파진동속도 측정방법)에 준하여 측정하였다. 내산성 시험은 재령 7일된 Ø100×200mm 공시체를 황산 5%용액에 침지하였으며, 침지 후 14, 28, 42, 56일에 부식된 표면을 철솔로 닦아내어 표면건조포화상태의 중량을 측정하였다. 실험결과 단위결합재량이 증가함에 따라 재생 굵은골재 및 잔골재의 치환율에 관계없이 압축강도 및 휨강도가 증가하는 것으로 나타났으며, 모든 배합에서 단위결합재량 증가에 따른 강도 증가 폭이 크기 때문에 폴리머 콘크리트 적용 구조물의 설계에 요구되는 강도를 고려한 배합설계가 이루어져야 할 것으로 판단된다. 골재 크기에 따른 강도 편차는 단위결합재량의 증가에 비하여 매우 작게 나타나 골재 크기 보다는 결합재인 폴리머의 영향을 크게 받는 것으로 나타났다. 한편 재생 굵은골재 및 재생 잔골재를 혼입한 배합과 재생골재를 전혀 혼입하지 배합의 강도는 거의 유사하거나 약간 감소하는 경향을 나타내 폴리머 콘크리트의 골재로써 재생골재의 사용이 충분히 가능할 것으로 판단되었다. 또한 모든 배합에서 황산에 대한 장기 침적에도 중량변화 및 압축강도 감소가 거의 없는 것으로 나타났다.