Effect of MSWI Fly Ash and Incineration Residues on Cement Performances

武汉理工大学学报-材料科学版(英文版), 2010, 25(2): 312-315. doi: 10.1007/s11595-010-2312-0

^1, , ^2, , ^3, , ^4,

1.Key Laboratory for Silicate Materials Science and Engineering of Ministry of Education, Wuhan University of Technology, Wuhan 430070, China

2.Key Laboratory for Silicate Materials Science and Engineering of Ministry of Education, Wuhan University of Technology, Wuhan 430070, China;Micrulab, Faculty of Civil Engineering and GeoScience, Delft University of Technology, 2600 GA Delft, The Netherlan

3.Key Laboratory for Silicate Materials Science and Engineering of Ministry of Education, Wuhan University of Technology, Wuhan 430070, China

4.Key Laboratory for Silicate Materials Science and Engineering of Ministry of Education, Wuhan University of Technology, Wuhan 430070, China

基金项目: the Major State Basic Research and Development Program of China ("973" Program)(2009CB623201)

Effect of MSWI Fly Ash and Incineration Residues on Cement Performances

LI Xiangguo ^1, , YU Zhuqing ^2, , MA Baoguo ^3, , WU Bei ^4,

1.Key Laboratory for Silicate Materials Science and Engineering of Ministry of Education, Wuhan University of Technology, Wuhan 430070, China

3.Key Laboratory for Silicate Materials Science and Engineering of Ministry of Education, Wuhan University of Technology, Wuhan 430070, China

4.Key Laboratory for Silicate Materials Science and Engineering of Ministry of Education, Wuhan University of Technology, Wuhan 430070, China

Keywords： MSWI fly ash

The activities of municipal solid waste incineration (MSWI) fly ash and incineration residues were studied contrastively, through the component analysis and the activity ratio tests. The mechanical properties, hydration mechanism and leaching toxicity of the hardened cement paste mixing with MSWI fly ash and incineration residues were investigated. The experimental results indicated that the active constituents (CaO+Al2O3+Fe2O3) in MSWI fly ash were higher than those in incineration residues. Therefore the activity ratio of MSWI fly ash was 43.58%, twice as much as that of incineration residues. Meanwhile, the hydration of cement was delayed by mixing with MSWI fly ash and incineration residues, which also reduced the cement strength markedly. By adding with exceeding 20% MSWI fly ash, the specimens expanded and microcracks appeared. The leaching toxici-ties of cement pasted mixed with MSWI fly ash and incineration residues were lower than the Chinese national standard. Accordingly the cement mixed by MSWI fly ash and incineration residues can be considered as the environment-friendly materials.

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Effect of MSWI Fly Ash and Incineration Residues on Cement Performances

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