[1]何小芳,缪昌文,洪锦祥,等.水泥浆体的热分析动力学[J].东南大学学报(自然科学版),2011,41(3):601-605.[doi:10.3969/j.issn.1001-0505.2011.03.033]
 He Xiaofang,Miao Changwen,Hong Jinxiang,et al.Thermal analysis kinetics of cement paste[J].Journal of Southeast University (Natural Science Edition),2011,41(3):601-605.[doi:10.3969/j.issn.1001-0505.2011.03.033]
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水泥浆体的热分析动力学()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
41
期数:
2011年第3期
页码:
601-605
栏目:
化学化工
出版日期:
2011-05-20

文章信息/Info

Title:
Thermal analysis kinetics of cement paste
作者:
何小芳123缪昌文2洪锦祥2尚燕2
(1东南大学江苏省土木工程材料重点实验室,南京 211189)(2江苏省建筑科学研究院有限公司,南京 210008)(3河南理工大学材料学院,焦作 454000)
Author(s):
He Xiaofang123Miao Changwen2Hong Jinxiang2Shang Yan2
(1 Key Laboratory of Civil Engineering Materials of Jiangsu Province, Southeast University, Nanjing 211189, China)
(2 Jiangsu Province Institute of Science and Technology Co., Ltd.,Nanjing 210008, China)
(3 School of Material Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China)
关键词:
硅酸盐水泥浆体差示扫描量热法热分析动力学活化能
Keywords:
Portland cement paste differential scanning calorimeter thermal analysis kinetics activation energy
分类号:
TQ172.1+1
DOI:
10.3969/j.issn.1001-0505.2011.03.033
摘要:
以差示扫描量热法为手段,进行了水化硅酸盐水泥浆体热分析动力学的研究.采用Kim-Park, Flynn-Wall-Ozawa和Friedman法计算了升温过程水泥浆体各阶段吸热反应活化能和反应级数.结果表明:升温过程中水泥浆体呈现3个吸热反应阶段,随温度升高各反应阶段活化能逐渐升高; Kim-Park, Flynn-Wall-Ozawa和Friedman三种方法较好地分析了前2个反应阶段的反应活化能和反应级数,第一阶段的反应活化能小于第二阶段,但反应级数n却大于后者; 对于前2个吸热反应阶段,Kim-Park和Flynn-Wall-Ozawa均能较好地进行动力学分析,但Friedman法对于第三阶段即C-S-H发生脱水过程的反应活化能计算误差较大.
Abstract:
The kinetics of thermal analysis of hydrated cement pastes were investigated by differential scanning calorimeter (DSC) analysis in nitrogen. During the temperature-rise period the activation energy and reaction orders of pastes were calculated by Kim-Park, Flynn-Wall-Ozawa and Friedman methods. The results show that three endothermic reaction stages appear during the temperature-rise period and their activation energy increase when the temperature gradually increases. The activation energy and reaction orders of first two reaction stages are analyzed by Kim-Park, Flynn-Wall-Ozawa and Friedman methods. The activation energy of the first reaction stage is less than the second stage, but the reaction order n is greater than the latter. The first two endothermic reaction stages can be better analyzed by Kim-Park and Flynn-Wall-Ozawa methods. For the third endothermic reaction stage the calculation error of activation energy is bigger when Friedman method is adopted.

参考文献/References:

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备注/Memo

备注/Memo:
作者简介:何小芳(1980—),女,博士生;缪昌文(联系人),男,博士,教授,博士生导师,mcw@cnjsjk.cn.
基金项目:国家重点基础研究发展计划(973计划)资助项目(2009CB623200).
引文格式: 何小芳,缪昌文,洪锦祥,等.水泥浆体的热分析动力学[J].东南大学学报:自然科学版,2011,41(3):601-605.[doi:10.3969/j.issn.1001-0505.2011.03.033]
更新日期/Last Update: 2011-05-20