Abstract
A pilot study was conducted to produce high performance green ceramsite by using sewage sludge, fly ash and silt. According to the theory of Riley, the proportions of raw materials were chosen to perform the sintering experiments. Thereby, the optimum proportion of sludge, fly ash and silt and sintering parameters were determined. The microstructure of the optimized mixture and the leaching of heavy metal elements were also analyzed. The lab testing results show that sintering parameters have significant impact on the performance of ceramsite. For solid waste ceramsite with high loss of ignition, inadequate pre-burning process lowers the strength and increases the water absorption. Low water absorption can be achieved by the enameled surface and closed pore structure. The high performance green ceramsite has the density grade of 700, water absorption of 6% and compressive strength of 6.6 MPa. The ceramsite is mainly composed of cristobalite and mullite. The leaching of heavy metal elements from the solid waste ceramsite are lower than the limits required by the national standard. This study shows that the utilization of solid waste ceramsite as the light weight aggregate is feasible and safe.
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References
LI Renbo. Study on the Preparation of Sludge Ceramsite Application in Wastewater Treatment [D]. Wuhan: Wuhan University of Technology, 2008
Du Xin. Research on Technology and Batch Formula of Sintering Municipal Sewage Sludge for Manufacturing Haydite [J]. Sichuan Building Materials, 2009, 35(4):61–63
Tay J H, Show K Y, Hong S Y. Concrete Aggregates Made from Sludge-Marine Clay Mixes [J]. Journal of Materials in Civil Engineering, 2002, 9(11):392–398
QIAN Jueshi, LU Hao, ZHANG Zhiqiang. Reduction of Water Absorption of Expanded Shale by Hydrophobic Treatment[J]. Journal of Building Materials, 2002, 5(6):181–185
Nakouzi S, Mielewski D, Ball J C, et al. Novel Approach to Paint Sludge Recycling [J]. Journal of Material Research, 1998, 13(1):53–60
HE Yanjun, YAN Zhenjia. Practical Techniques of Ceramsite Production [M]. Beijing: Chemical Industry Press, 2006
YUAN Haiqing, JING Hang, TANG Daoyi, et al. Mechancal Properties of Shale Ceramsite Concrete with Recycled Rubber Powder under Compression [J]. Journal of Building Materials, 2007, 10(3):369–373
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Funded by the National Natural Science Foundation of China (No.51078189), the K.C.Wong Magna Fund in Ningbo University and Zhejiang Province Energy Conservation Innovative Team Project in Building (No.2009R50022)
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Liu, J., Liu, R., He, Z. et al. Preparation and microstructure of green ceramsite made from sewage sludge. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 27, 149–153 (2012). https://doi.org/10.1007/s11595-012-0426-2
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DOI: https://doi.org/10.1007/s11595-012-0426-2