基于迭代算法的水泥水化动力学多元方法研究

　第４０卷第３期

　２０１７年３月合肥工业大学学报（自然科学版）JOURNAL OF HEFEI UNIVERSITY OF T ECHNOLOGY Vol ．４０No ．３　Mar ．２０１７收稿日期：２０１５‐１１‐０５；修回日期：２０１６‐１２‐２６

基金项目：国家自然科学基金资助项目（５１００８１０９；５１４０８１７３）；安徽省住房城乡建设科学技术计划资助项目（２０１３Y F ‐０１）作者简介：胡　超（１９９３－），男，安徽颍上人，合肥工业大学硕士生；

韩　丁（１９８２－），男，安徽肥东人，博士，合肥工业大学副教授，硕士生导师．DOI ：１０．３９６９／j ．issn ．１００３‐５０６０．２０１７．０３．０１９

胡　超１，　刘东泽２，　韩　丁１，　逄焕平１

（１．合肥工业大学汽车与交通工程学院，安徽合肥　２３０００９；２．中铁城市规划院有限公司，安徽芜湖　２４１０００）

摘　要：为合理确定水化动力学分析的参数和实现研究手段多样化，文章提出一种参数识别迭代算法，并探讨了获取水化热数据的数值试验和替代水化热法的背散射电子（back ‐scattered electron ，BSE ）图像识别。针对Krstulovic 水化动力学模型，通过迭代算法得出各水化阶段的控制时间，为参数识别提供有效的数据区间；使用COMSOL 软件建立与绝热温升试验工况一致的数值仿真试验，并将获得的水化温度曲线和最大水化放热量与试验数据进行了比较；识别不同水化时期水泥浆体BSE 图像中水化产物的面积比，作为水化程度来确定水泥水化指数函数方程，并与试验数据对比来评价该方程的预估精度。依据迭代算法获取了合理的水化动力学参数，其生成的水化速率曲线与试验数据具有较好的吻合度；水泥水化数值仿真试验可以用来预测绝热情况下水泥混凝土的温度变化，能替代绝热温升试验；依据BSE 图像中水化产物面积比获得的水化指数函数与试验数据的吻合度较好，能替代传统水化热法进行水化动力学分析。

关键词：水化动力学；水化方程参数；迭代算法；数值仿真；背散射图像识别

中图分类号：TQ １７２畅１１文献标识码：A 文章编号：１００３‐５０６０（２０１７）０３‐０３９０‐０７

Multivariate methods for hydration kinetics research

of cement using iterative algorithm HU Chao １，　LIU Dongze ２，　HAN Ding １，　PANG Huanping １（１．School of Automobile and T raffic Engineering ，Hefei U niversity of T echnology ，Hefei ２３０００９，China ；２．China Railw ay U rban Plan ‐ning and Design Institute Co ．，L td ．，Wuhu ２４１０００，China ）

Abstract ：In

order to determine accurate hydration kinetic parameters and diversify research methods of hydration kinetics ，an iterative algorithm was put forward ．A numerical model for getting hydration heat and back ‐scattered electron （BSE ）image recognitions for replacing hydration heat

method

were

studied individually

．Dominant

periods

at different

hydration processes of Krstulovic kinetic model ，w hich were given by the iterative algorithm ，can provide effective data ranges for parameters identifi ‐cations ．A numerical model ，w hich applied the same working conditions of standard adiabatic calorim ‐eter test

，was established by COM SOL software ．T he hydration temperature curve and maximum hy ‐dration heat calculated by results of the model were

compared with experimental data respectively ．Area ratios of hydration products in BSE images at different hydration time were considered as hydra

‐tion degrees to get an exponential function of cement hydration ，w hose precision was verified by test data ．Reasonable hydration kinetic parameters were obtained by the iterative algorithm ．Hydration rate curve ，w hich was created by kinetic parameters ，coincides with experimental data ．T he numerical

model of cement hydration can predict temperature variation of cement concrete under adiabatic condi

‐tion and replace the standard adiabatic calorimeter test ．T he exponential function of cement hydra ‐tion ，w hich was obtained by area ratios of hydration products ，fits well with experimental data and

万方数据