[1]刘加平,李华,田倩,等.基于薄层毛细渗透技术的水泥和矿物掺合料动态接触角测定[J].东南大学学报(自然科学版),2013,43(5):1074-1079.[doi:10.3969/j.issn.1001-0505.2013.05.029]
 Liu Jiaping,Li Hua,Tian Qian,et al.Determination of dynamic contact angles of cement and mineral admixtures based on thin-layer wicking technique[J].Journal of Southeast University (Natural Science Edition),2013,43(5):1074-1079.[doi:10.3969/j.issn.1001-0505.2013.05.029]
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基于薄层毛细渗透技术的水泥和矿物掺合料动态接触角测定()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
43
期数:
2013年第5期
页码:
1074-1079
栏目:
材料科学与工程
出版日期:
2013-09-20

文章信息/Info

Title:
Determination of dynamic contact angles of cement and mineral admixtures based on thin-layer wicking technique
作者:
刘加平123李华1田倩1王育江1
1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, 南京211103; 2东南大学材料科学与工程学院, 南京211189; 3东南大学江苏省土木工程材料重点实验室, 南京211189
Author(s):
Liu Jiaping123 Li Hua1 Tian Qian1 Wang Yujiang1
1 State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Academy of Building Science Co., Ltd., Nanjing 211103, China
2 School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
3 Jiangsu Key Laboratory of Construction Materials, Southeast University, Nanjing 211189, China
关键词:
接触角 水泥基材料 薄层毛细渗透技术
Keywords:
contact angle cement-based materials thin-layer wicking technique
分类号:
TU528
DOI:
10.3969/j.issn.1001-0505.2013.05.029
摘要:
为表征水泥和矿物掺合料与水的润湿性,采用薄层毛细渗透方法对水与不同水化时间的水泥净浆粉末及粉煤灰、矿渣粉、硅灰粉等矿物掺合料粉体的动态接触角进行了测试.结果表明,选用无水乙醇做参比液,水与水泥颗粒粉末表面的初始相对动态接触角约56°,随着水化的进行,动态接触角逐渐降低,最终稳定在(22±1)°.水在粉煤灰粉体和矿渣粉体表面的相对动态接触角分别为56°~60°和53°~63°,在硅灰粉体和CaCO3粉体表面的相对动态接触角分别约为43°和70°.就亲水性而言,由强到弱的顺序依次为:硅灰、水泥、粉煤灰、矿渣粉、CaCO3.水化水泥浆体粉末与水的接触角随水化进行逐渐减小并最终趋于恒定.
Abstract:
To test the wettabilities of cement and mineral admixtures with water, the dynamic contact angles between water and cement paste powders, fly ash, slag, silica fume and other mineral admixtures with different hydration times were characterized by using thin-layer wicking technique. The results show that by using ethanol as the reference liquid, the relative dynamic contact angle of water and cement particles is initially about 56°; as the hydration proceeds, the contact angle gradually decreases and eventually stabilizes at(22±1)°. The relative dynamic contact angle of water and fly ash powder and that of water and slag powder are 56° to 60° and 53° to 63°, respectively. The relative dynamic contact angle of water and silica fume powder and that of water and CaCO3 powder are about 43° and 70°, respectively. The order of the hydrophilicities of these powder materials, from strong to weak, is silica fume, cement, fly ash, slag and CaCO3 powder. As the hydration proceeds, the contact angle between cement paste and water decreases gradually and finally tends to be constant.

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备注/Memo

备注/Memo:
作者简介: 刘加平(1967—),男,博士,教授级高级工程师,ljp@cnjsjk.cn.
基金项目: 国家杰出青年科学基金资助项目(512250075)、国际科技合作计划资助项目(BZ2012003).
引文格式: 刘加平,李华,田倩,等.基于薄层毛细渗透技术的水泥和矿物掺合料动态接触角测定[J].东南大学学报:自然科学版,2013,43(5):1074-1079. [doi:10.3969/j.issn.1001-0505.2013.05.029]
更新日期/Last Update: 2013-09-20