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Structural Engineering and Mechanics Volume 40, Number 3, November10 2011 , pages 411-429 DOI: https://doi.org/10.12989/sem.2011.40.3.411 |
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Behavior of reinforced concrete beams filled with demolished concrete lumps |
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Bo Wu, Zhe Xu, Zhongguo John Ma, Qiongxiang Liu and Wei Liu
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| Abstract | ||
| In the past decades, recycling use of demolished concrete was almost limited to the types of recycled coarse aggregate with a size of about 5-40 mm and recycled fine aggregate with a size of about 0-5 mm for concrete structures, and reuse of demolished concrete lumps (DCLs) with a size much larger than that of recycled aggregate, e.g., 50-300 mm, has been limited to roadbed, backfilling materials, or discarded to landfills. Treatment processes of DCLs are much simpler than those of recycled aggregate, leading to less cost and more energy-saving. In the future, the amount of demolished concrete is estimated to be much higher, so reuse of DCLs for concrete structures will become necessary. The objectives of this paper are to document the process of making reinforced concrete beams with DCLs, and to discuss the flexural and shear behaviors of those reinforced DCL beams through an experimental program, which includes three beams filled with DCLs and one conventional beam for investigating the flexural strengths and deformations, and 12 beams filled with DCLs and two conventional beams for investigating the shear strengths and deformations. The authors hope that the proposed concept offers another sustainable solution to the concrete industry. | ||
| Key Words | ||
| demolished concrete; reinforced concrete; beams; sustainability; flexural behavior; shear strength | ||
| Address | ||
| Bo Wu: State Key Laboratory of Subtropical Building Science, Department of Civil Engineering, South China Univ. of Technology, Guangzhou 510640, China Zhe Xu: State Key Laboratory of Subtropical Building Science, Department of Civil Engineering, South China Univ. of Technology, Guangzhou 510640, China; Shenzhen General Institute of Architectural Design and Research, Shenzhen 518031, China Zhongguo John Ma: Department of Civil and Environmental Engineering, University of Tennessee Knoxville, 223 Perkins Hall, Knoxville, TN 37996-2010, USA Qiongxiang Liu: Shenzhen General Institute of Architectural Design and Research, Shenzhen 518031, China Wei Liu: State Key Laboratory of Subtropical Building Science, Department of Civil Engineering, South China Univ. of Technology, Guangzhou 510640, China; Shenzhen General Institute of Architectural Design and Research, Shenzhen 518031, China | ||