核磁共振冷冻测孔法测量水泥基材料孔径分布研究.pdfVIP

昂 10面 弗 1期 建 筑 材 料 学 报 V01．15，No．1 学兔兔 2012年 2月 JOURNAL OF BUILDING MATERIALS Feb．。2012 文章编号：1007—9629(2012)01—0006—05 核磁共振冷冻测孔法测量水泥基材料孑L径分布研究 王中平， 黄晨明， 王 搜 (同济大学 先进土木工程材料教育部重点实验室，上海 201804) 摘要：对核磁共振冷冻测孔法(NMRC法)在水泥基材料中的应用进行了试验探索．通过使用介孔 分子筛确定了冰熔点下降值与多孔材料孔径关系，获得熔点下降常数，并以此测定了不同龄期、不 同水灰比白水泥样品的孔径分布，对其可能的误差来源作了分析．初步研究结果表明，核磁共振冷 冻法测得的白水泥样品孔径分布信息可能比其他方法更为丰富，对封闭微孔的分辨更为其所特有． 关键词：核磁共振；冷冻测孔法；孔径分布；吉布斯一托马斯方程；白水泥 中图分类号：TQ172．1 6 文献标志码：A doi：10．3969／j．issr1．1007—9629．2012．01．002 Study of Pore Size Distribution Measurement of Cementitious Materials by Nuclear Magnetic Resonance Cryoporometry(NMRC) WANG Zhong—ping， HUANG Chen—ruing， WANG Tao (Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education， TongJi University，Shanghai 201804，China) Abstract：The application of nuclear magnetic resonance cryoporometry(NMRC)for eementitious materials was analyzed．The constant in Gibbs—Thomson equation that described the relationship between decrease value of ice melt point and pore size was obtained via measuring some mesoporous molecular sieve with cer— tain pore size．The constant was then used to analyze the white cement samples with different mw mc at different ages，and the possible error was discussed．The preliminary result shows that NMRC can give more details of pore size distribution of white cement samples than other methods，such as the volume of close micropore． Key words：NMR；cryoporometry；pore size distribution；Gibbs—Thomson equation；white cement 目前用于测量多孔材料孔径分布的主要方法有 冻测孔法(简称NMRC法，下同)的测试结果与上述