Use of industrial wastes for the synthesis of belite clinker

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2020-09-15 DOI:10.3989/mc.2020.14219

M. Enríquez, J. Tobón, J. Ramírez

引用次数: 6

Abstract

The synthesis of belite clinker was studied using industrial wastes: paper sludge, cement kiln dust and rice husk ashes, as substitutes for natural raw materials. Wastes were characterized by XRF, XRD and TG analysis. Different formulations were prepared to produce clinker at 1300, 1350 and 1400 °C. The clinker obtained was characterized using optical microscopy, XRD and f-CaO content determined by ethylene glycol method. Finally, the hydration of prepared cements with the clinkers was evaluated by isothermal microcalorimetry. It was found that by mixing paper sludge, cement kiln dust and rice husk ashes, it is possible to obtain belite clinker with f-CaO content below 0.5%, in clinkering temperatures between 1350 °C and 1400 °C without the use of natural raw materials. It was found that these cements have a high hydration kinetic, far above the rate of Ordinary Portland Cement, due mainly by the amorphous phase content in clinkers obtained.

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利用工业废料合成白石熟料

研究了以造纸污泥、水泥窑灰、稻壳灰等工业废渣代替天然原料合成白石熟料的工艺。利用XRF、XRD和TG对废弃物进行了表征。配制不同的配方，在1300、1350和1400℃下生产熟料。用光学显微镜、XRD和乙二醇法对所制熟料进行了表征。最后，用等温微热法评价了所制水泥与熟料的水化作用。研究发现，在不使用天然原料的情况下，将纸泥、水泥窑灰和稻壳灰混合，在1350℃~ 1400℃的熟料温度下，可以得到f-CaO含量低于0.5%的白石熟料。研究发现，这些水泥具有较高的水化动力学，远高于普通硅酸盐水泥的水化动力学，这主要是由于所获得的熟料中非晶相的含量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.