Shi Hui-sheng, Deng Kai, Yuan Feng, Wu Kai
Key Laboratory of Advanced Civil Engineering Materials of Education Ministry, Tongji University, Shanghai 200092, China.
J Hazard Mater. 2009 Sep 30;169(1-3):551-5. doi: 10.1016/j.jhazmat.2009.03.134. Epub 2009 Apr 5.
MSWI fly ash was used as a major cement raw material in sintering sulphoaluminate cement clinker successfully in the laboratory. Sintering system, mechanical performance, hydration process and microstructure of the clinker was investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray fluorescence spectrometry (XRF), etc. The result shows that the clinker can be sintered properly under the temperature of 1200-1300 degrees C and sintered time of 120 min. Cl(-) content in the clinker made with MSWI fly ash is about 1.08%. However most Cl(-) cannot leach out in water solution from the hardened cement paste during curing age between 1d and 28d because of the Cl(-) being combined in clinker minerals and its hydrates. The compressive strength of the sulphoaluminate cement was high in early age while that developed smoothly in later age.
在实验室中，城市固体废弃物焚烧飞灰被成功用作烧结硫铝酸盐水泥熟料的主要水泥原料。通过X射线衍射（XRD）、扫描电子显微镜（SEM）、X射线荧光光谱法（XRF）等手段，对熟料的烧结体系、力学性能、水化过程和微观结构进行了研究。结果表明，在1200 - 1300℃的温度和120分钟的烧结时间下，熟料能够顺利烧结。用城市固体废弃物焚烧飞灰制成的熟料中Cl(-)含量约为1.08%。然而，在1天至28天的养护期内，由于Cl(-)结合在熟料矿物及其水合物中，大部分Cl(-)不能从硬化水泥浆体的水溶液中浸出。硫铝酸盐水泥的抗压强度在早期较高，后期发展平稳。
