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 microstrueture 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.
参考文献
| [1] | 杜欣.市政污泥烧结制陶粒的工艺与配方研究[J].四川建材,2009(02):61-63. |
| [2] | Joo-Hwa Tay;Kuan-Yeow Show;Sze-Yunn Hong .Concrete Aggregates Made from Sludge-Marine Clay Mixes[J].Journal of Materials in Civil Engineering,2002(5/6):392-398. |
| [3] | 钱觉时,卢浩,张智强.表面憎水处理改善陶粒吸水性能的研究[J].建筑材料学报,2002(02):181-185. |
| [4] | Nakouzi S.;Ball JC.;Kim BR.;Salmeen IT.;Bauer D.;Narula CK.;Mielewski D. .A novel approach to paint sludge recycling: Reclaiming of paint sludge components as ceramic composites and their applications in reinforcement of metals and polymers[J].Journal of Materials Research,1998(1):53-60. |
| [5] | 袁海庆,静行,汤道义,刘文龙.掺废橡胶粉页岩陶粒混凝土的受压性能[J].建筑材料学报,2007(03):369-373. |
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