Preparation of the saving-energy sulphoaluminate cement using MSWI fly ash.
Preparation of the saving-energy sulphoaluminate cement using MSWI fly ash.
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DOI：
10.1016/j.jhazmat.2009.03.134
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发表时间：
2009-09
影响因子：
13.6
通讯作者：
Hui-sheng Shi;K. Deng;F. Yuan;Kai Wu
中科院分区：
文献类型：
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作者：
Hui-sheng Shi;K. Deng;F. Yuan;Kai Wu
以垃圾焚烧飞灰为主要水泥原料，在实验室成功地烧成了硫铝酸盐水泥熟料。采用X射线衍射仪(X射线衍射仪)、扫描电子显微镜(SEM)、X射线荧光光谱仪(XRF)等手段对熟料的烧成制度、力学性能、水化过程及显微结构进行了研究，结果表明，在1200~1300℃、120min的烧成条件下，熟料可以得到较好的烧成。利用垃圾焚烧飞灰配制的熟料中CL-−含量约为1.08%。然而，在1d~28d的养护过程中，由于Cl−结合在熟料矿物及其水化产物中，大部分的Cl−不能从硬化水泥浆体的水溶液中浸出。硫铝酸盐水泥早期抗压强度较高，后期发展平稳。
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°C and sintered time of 120min. 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.