[1]周伟玲,孙伟,陈翠翠,等.应用纳米压痕技术表征水泥基材料微观力学性能[J].东南大学学报(自然科学版),2011,41(2):370-375.[doi:10.3969/j.issn.1001-0505.2011.02.030]
 Zhou Weiling,Sun Wei,Chen Cuicui,et al.Characterization for micro mechanical properties of cementitious materials by nanoindentation technique[J].Journal of Southeast University (Natural Science Edition),2011,41(2):370-375.[doi:10.3969/j.issn.1001-0505.2011.02.030]
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应用纳米压痕技术表征水泥基材料微观力学性能()
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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2期
页码:
370-375
栏目:
材料科学与工程
出版日期:
2011-03-20

文章信息/Info

Title:
Characterization for micro mechanical properties of cementitious materials by nanoindentation technique
作者:
周伟玲12孙伟1陈翠翠2缪昌文2
(1 东南大学材料科学与工程学院,南京 211189)
(2江苏省建筑科学研究院有限公司高性能土木工程材料国家重点实验室,南京 210008)
Author(s):
Zhou Weiling12Sun Wei1Chen Cuicui2Miao Changwen2
(1School of Material Science and Engineering, Southeast University, Nanjing 211189, China)
(2State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Academy of Building Science Co., Ltd., Nanjing 210008, China)
关键词:
纳米压痕技术粉煤灰水泥基材料微观力学性能
Keywords:
nanoindentation technique fly ash cementitious material micro mechanical properties
分类号:
TU528.45
DOI:
10.3969/j.issn.1001-0505.2011.02.030
摘要:
为了更好地研究和表征水泥基材料的微观结构及形成机理,对水泥净浆及掺粉煤灰的水泥浆体进行了微观力学性能研究.应用纳米压痕技术测试、分析并计算了不同浆体中各个区域的弹性模量和硬度,并对各参数在二维平面的分布进行了描绘.同时,利用高斯函数对弹性模量、硬度的频率分布曲线进行了多峰拟合,获得水化产物中毛细孔、高密度C-S-H凝胶(HD C-S-H)、低密度C-S-H凝胶(LD C-S-H)以及氢氧化钙相关参数的统计分布.分析结果表明,胶凝材料组成、水胶比、水化龄期等会引起水泥浆体中水化产物的差异,尤其是C-S-H凝胶堆积形貌的变化,进而影响到胶凝材料的宏观力学性能.
Abstract:
Micro mechanical properties of cement paste and paste with fly ash were studied to get better characterization of their microstructure and developing mechanism. Micro mechanical properties of different pastes were tested by nanoindentation technique. The elastic modulus and hardness of indented area are calculated and mapped in a 2D plane. After that, multi peak fitting were carried out for the frequency plots of the tested parameters by Gaussian function. And the statistical distribution of the micro mechanical properties was summarized for the hydrates in cementitious paste, including the capillary pores, low density C-S-H, high density C-S-H and portlandite. It’s indicated that the hydrates of paste may change due to the variation of composition of cementitious material, water to binder ratio and hydration age. Especially the packing of the C-S-H may be influenced. And it will bring changes to the macro mechanical property of the cementitious materials.

参考文献/References:

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备注/Memo

备注/Memo:
作者简介:周伟玲(1971—),女,博士生,教授级高级工程师;孙伟(联系人),女,教授,博士生导师,中国工程院院士,sunwei@seu.edu.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: 周伟玲,孙伟,陈翠翠,等.应用纳米压痕技术表征水泥基材料微观力学性能[J].东南大学学报:自然科学版,2011,41(2):370-375.[doi:10.3969/j.issn.1001-0505.2011.02.030]
更新日期/Last Update: 2011-03-20