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RISS 인기검색어
- 검색키워드
- 주제어 : Percentage of RCA (검색결과 4 건)
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순환골재를 사용한 고강도 철근콘크리트보의 휨거동에 관한 연구
김우석(Kim, Woo-Suk),여진동(Yeo, Jin-Dong),곽윤근(Kwak, Yoon-Keun),강현구(Kang, Thomas H.-K.),홍성걸(Hong, Sung-Gul) 대한건축학회 2012 大韓建築學會論文集 : 構造系 Vol.28 No.3
Currently, approximately 90% of waste concrete is being used solely for landfills. Of the total waste concrete only about 14% is made into aggregate and recycled. Such usage is a very low-efficiency method of recycling these materials, under-utilizing an important and valuable asset. Common engineering practice has thus far failed to promote the design of structural members using recycled aggregates. Moreover, appropriate structural design standards for such materials have not been established, despite the number of domestic research studies which have been, and are being, conducted. Such practices overlook the fact that the recycling of aggregate from demolished concrete structures is both structurally and economically beneficial. In making full use of recycled concrete aggregates (RCA) it is necessary to understand its mechanical properties such as compressive, tensile and flexural strengths, and bond strength, as well as its structural performance. The main objectives of this research study are the investigation of flexural performance and the evaluation of the potential applications of RCA on concrete structures. For this, flexural tests of 12 reinforced high-strength concrete beams with RCA were performed. The current test data were examined in terms of flexural strength, along with the data from previously tested reinforced concrete beams with RCA. It is anticipated that this research will play a role of establishing the structural design standards for concrete members with RCA.
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순환골재를 사용한 고강도 철근콘크리트보의 휨거동에 관한 연구
김우석,여진동,곽윤근,강현구,홍성걸,Kim, Woo-Suk,Yeo, Jin-Dong,Kwak, Yoon-Keun,Kang, Thomas H.K.,Hong, Sung-Gul 대한건축학회 2012 대한건축학회논문집 Vol.28 No.3
Currently, approximately 90% of waste concrete is being used solely for landfills. Of the total waste concrete only about 14% is made into aggregate and recycled. Such usage is a very low-efficiency method of recycling these materials, under-utilizing an important and valuable asset. Common engineering practice has thus far failed to promote the design of structural members using recycled aggregates. Moreover, appropriate structural design standards for such materials have not been established, despite the number of domestic research studies which have been, and are being, conducted. Such practices overlook the fact that the recycling of aggregate from demolished concrete structures is both structurally and economically beneficial. In making full use of recycled concrete aggregates (RCA) it is necessary to understand its mechanical properties such as compressive, tensile and flexural strengths, and bond strength, as well as its structural performance. The main objectives of this research study are the investigation of flexural performance and the evaluation of the potential applications of RCA on concrete structures. For this, flexural tests of 12 reinforced high-strength concrete beams with RCA were performed. The current test data were examined in terms of flexural strength, along with the data from previously tested reinforced concrete beams with RCA. It is anticipated that this research will play a role of establishing the structural design standards for concrete members with RCA.
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여진동,박태희,김우석,강현구,홍성걸,곽윤근,Yeo, Jin-Dong,Park, Tae-Hee,Kim, Woo-Suk,Kang, Thomas H.K.,Hong, Sung-Gul,Kwak, Yoon-Keun 대한건축학회 2011 대한건축학회논문집 Vol.27 No.9
Developed society is beginning to face an environmental crisis in that enormous quantities of demolished concrete are both damaging to the environment and wasteful to the economy. Conversely, most of the waste concrete can be one of the largest market values by recycling. The problem is that the demolished concrete is currently not recycled economically and efficiently, and is used worthlessly for landfill or road basement. In many cases, the demolished concrete remains as just waste concrete, which can cause a serious environmental problem. Up to now, the Korean architectural and civil engineering society has barely found the value of the recycled concrete that can be matched with that of high performance concrete, both of which are especially useful for the mega construction site. The result from this recycled concrete study is very important in these aspects. The RCA (recycled concrete aggregate) must be researched more in terms of mechanical properties and structural performance. The moment strength, cracking and steel yielding processes and failure mode are investigated for varying steel ratios and percentage of RCA. The normal strength concrete with a 24 MPa compressive strength is used. In recycled concrete aggregate (RCA), the compressive strength is particularly important, because the RCA requires more water than NCA (normal concrete aggregate) so that a lower strength can be produced. Therefore, more efforts are needed to gain the design strength. This experiment investigates the flexural performance and suggests the possible application of RCA for building structures. Furthermore, this research will play an important role toward the establishment of the structural design standard for recycled concrete.
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여진동(Yeo Jin-Dong),박태희(Park Tae-Hee),김우석(Kim Woo-Suk),강현구(Kang Thomas H.-K.),홍성걸(Hong Sung-Gul),곽윤근(Kwak Yoon-Keun) 대한건축학회 2011 大韓建築學會論文集 : 構造系 Vol.27 No.9
Developed society is beginning to face an environmental crisis in that enormous quantities of demolished concrete are both damaging to the environment and wasteful to the economy. Conversely, most of the waste concrete can be one of the largest market values by recycling. The problem is that the demolished concrete is currently not recycled economically and efficiently, and is used worthlessly for landfill or road basement. In many cases, the demolished concrete remains as just waste concrete, which can cause a serious environmental problem. Up to now, the Korean architectural and civil engineering society has barely found the value of the recycled concrete that can be matched with that of high performance concrete, both of which are especially useful for the mega construction site. The result from this recycled concrete study is very important in these aspects. The RCA (recycled concrete aggregate) must be researched more in terms of mechanical properties and structural performance. The moment strength, cracking and steel yielding processes and failure mode are investigated for varying steel ratios and percentage of RCA. The normal strength concrete with a 24 MPa compressive strength is used. In recycled concrete aggregate (RCA), the compressive strength is particularly important, because the RCA requires more water than NCA (normal concrete aggregate) so that a lower strength can be produced. Therefore, more efforts are needed to gain the design strength. This experiment investigates the flexural performance and suggests the possible application of RCA for building structures. Furthermore, this research will play an important role toward the establishment of the structural design standard for recycled concrete.
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