煅烧黏土反应活性及其影响机理
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1.武汉理工大学;2.巴基斯坦卡拉奇NED工程技术大学;3.尼泊尔国家科学技术院

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国家重点研发计划-政府间国际科技创新合作重点专项,武汉市科技计划项目


Reactivity of the Calcined Clay and Its Influencing Mechanism
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1.Wuhan University of Technology;2.NED University of Engineering and Technology;3.Nepal Academy of Science and Technology

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    摘要:

    通过煅烧黏土在碱性溶液中的反应热实验研究其反应活性,探明了溶液氢氧化钙含量、反应温度、煅烧温度和高岭石含量等因素对煅烧黏土反应活性的影响规律和机理. 研究发现:反应热实验可实现煅烧黏土反应活性的快速表征,且测得的累计放热量与黏土中高岭石含量具有良好的线性相关性;煅烧温度升高首先使得黏土颗粒破碎,结构无序化程度增大,反应活性出现并逐渐增长到峰值,随后会导致黏土颗粒粒径进一步增大,活性显著下降.

    Abstract:

    Through the reaction heat release of calcined clay in alkaline solution, this study investigated the influence law and the influence mechanism of calcium hydroxide content, reaction temperature, calcination temperature and kaolinite content on the reactivity of calcined clay. Results showed that the reactivity of calcined clay can be quickly characterized by the reaction heat release analysis, and there was a good linear correlation between the cumulative heat release and the kaolinite content of the clay. With the increase of calcination temperature, firstly, the clay particles were broken, the degree of structural disorder increased, and the reactivity appeared and gradually increased to the peak value, then the clay particle size further increased and the reactivity decreased significantly.

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  • 收稿日期:2021-12-30
  • 最后修改日期:2022-02-14
  • 录用日期:2022-03-17
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