Magnetic resonance imaging of crack formation in hydrated cement paste materials

被引：13
作者：
Young, JJ
Szomolanyi, P
Bremner, TW
Balcom, BJ
机构：
[1] Univ New Brunswick, Dept Civil Engn, Fredericton, NB E3B 5A3, Canada
[2] Univ New Brunswick, Dept Phys, MRI Ctr, Fredericton, NB E3B 5A3, Canada
来源：
CEMENT AND CONCRETE RESEARCH | 2004年 / 34卷 / 08期
基金：
加拿大自然科学与工程研究理事会;
关键词：
hydration; crack detection; pore size distribution; cement paste; magnetic resonance imaging;
D O I：
10.1016/j.cemconres.2004.01.023
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
A magnetic resonance imaging (MRI) methodology is presented to spatially resolve cracking in hydrated cement paste. The method is based on the relatively long spin-lattice (T-1) and spin-spin relaxation (T-2) times (magnetic resonance signal lifetimes) associated with water-filled cracks. Water-filled capillary and gel pores have much shorter signal lifetimes. As a noninvasive method, the technique may be used to study crack formation and propagation in well-controlled laboratory test samples. The method is proven to be capable of spatially resolving crack structures with widths of tens of micrometers. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1459 / 1466
页数：8
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