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Frontiers of Structural and Civil Engineering

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ISSN 2095-2449(Online)

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Front Struc Civil Eng    2013, Vol. 7 Issue (3) : 215-226    https://doi.org/10.1007/s11709-013-0212-z
RESEARCH ARTICLE
Research on recycled concrete and its utilization in building structures in China
Jianzhuang XIAO(email.png), Tao DING
Department of Building Engineering, Tongji University, Shanghai 200092, China
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Abstract

Large quantities of construction and demolition (C&D) building waste are being generated as a result of rapid urbanization and natural disasters in China. An increasing awareness of environmental protection is escalating C&D waste disposal concerns. This paper presents a brief introduction to current shaking table test research in China on structures built with recycled aggregate concrete (RAC). Test structures include a cast-in situ frame model, a precast frame model and a block masonry building. The test results prove that it is feasible to use RAC as a structural material in seismic areas, with recommended modifications and proper design, especially in low-rise structures. This paper also presents several successful applications of RAC in civil and structural engineering projects in China, which will serve to promote RAC as a global ecological structural material.
Keywords recycled aggregate concrete (RAC)      structural material      shaking table tests      building structure     
Corresponding Author(s): XIAO Jianzhuang,Email:jzx@tongji.edu.cn   
Issue Date: 05 September 2013
 Cite this article:   
Jianzhuang XIAO,Tao DING. Research on recycled concrete and its utilization in building structures in China[J]. Front Struc Civil Eng, 2013, 7(3): 215-226.
 URL:  
https://academic.hep.com.cn/fsce/EN/10.1007/s11709-013-0212-z
https://academic.hep.com.cn/fsce/EN/Y2013/V7/I3/215
Fig.1  Plane layout of the cast-in situ RAC model (unit: mm)
Fig.2  General view of the cast-in situ RAC frame model
Fig.3  Failure pattern of the cast-in situ RAC frame structure. (a) Beam; (b) column
PGA/gfloor
123456
0.0661/11141/8241/8631/9571/12201/2195
0.1301/4051/2801/2661/2921/4441/844
0.1851/2111/1741/1981/1991/3341/733
0.2641/2151/1701/1851/2121/3191/993
0.371/891/751/1001/1161/1821/455
0.4151/671/581/821/1011/1881/426
0.5501/381/341/581/881/1641/300
0.7501/291/291/411/611/1111/293
1.1701/291/251/411/661/1171/276
Tab.1  Maximum inter-story drift ratio
Fig.4  Capacity curve of the cast-in situ RAC model
Fig.5  Stiffness degradation of the cast-in situ RAC model
Fig.6  Details of the precast frame joint (Unit: mm)
Fig.7  General view of the precast RAC frame model
Fig.8  Failure pattern of the precast RAC frame structure. (a) Beam; (b) column and joint
Fig.9  Distribution of maximum inter-story drift
Fig.10  Capacity curves of the two models
Fig.11  Hysteresis loops of the precast RAC model
Fig.12  Plane layout and elevation of the RAC block masonry structure (unit: mm). (a) Plane layout; (b) elevation
Fig.13  General view of the RAC block masonry structure
Fig.14  Failure pattern of precast RAC block masonry structure. (a) Tie column; (b) masonry wall
PGA/groof displacement/mmtotal displacement/height
X-directionY-directionX-directionY-direction
0.0710.6110.6121/35991/3594
0.1361.5680.6451/14021/3411
0.2001.8380.8911/11971/2468
0.3103.4571.3441/6361/1637
0.4104.1111.4981/5351/1469
Tab.2  Maximum value of the roof displacement and the total displacement/height
damage-state1-22-33-44-5
performance levelnormal occupancy (NO)immediate occupancy (IO)life-safety (LF)collapse prevention (CP)
demandno damage or slight damage for structural and non-structural elementsneed a small amount of restoration for structural and non-structural elementsThe structure remains stable and has enough bearing capacitybuildings neither collapse nor suffer damage that would endanger human lives
drift ratio limit LSi/%0.10.50.91.3
Tab.3  Structural performance levels and drift ratio limits
Fig.15  Fragility curves for qualifying the performance of the RCA masonry building
Fig.16  Shanghai ecological house located in the 2010 Shanghai World Expo Park. (a) Construction on lower part of Shanghai ecological house; (b) construction on upper part of Shanghai ecological house; (c) general view of the Shanghai ecological house
Fig.17  Shanghai Urban Construction test building half made of RAC. (a) Cast-in situ RAC joint of this building; (b) Shanghai Urban Construction No. 2 building in construction process
Fig.18  Demonstration project with RAC in Dujiangyan
Fig.19  No. 6 building in Beijing University of Civil Engineering and Architecture. (a) Construction of No. 6 building with RAC in Beijing, China; (b) completed No. 6 building with RAC in Beijing, China
Fig.20  Office building using recycled aggregate bricks
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