A broad line NMR and MRI study of water and water transport in Portland cement pastes

被引：94

作者：

Bohris, AJ ^{[1
]}

Goerke, U ^{[1
]}

McDonald, PJ ^{[1
]}

Mulheron, M ^{[1
]}

Newling, B ^{[1
]}

Le Page, B ^{[1
]}

机构：

[1] Univ Surrey, Sch Phys Sci, Guildford GU2 5XH, Surrey, England

来源：

MAGNETIC RESONANCE IMAGING | 1998年 / 16卷 / 5-6期

关键词：

cement; diffusion; water; stray field imaging (STRAFI); magnetic resonance imaging; relaxation;

D O I：

10.1016/S0730-725X(98)00072-1

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

The results of a magnetic resonance spin-spin relaxation analysis and broad-line magnetic resonance imaging (MRI) (gradient-echo and stray-held imaging) study of water and water transport in Portland cement pastes are presented. The effect of varying the cure conditions and the water to cement (w/c) ratio of the sample mix are discussed. The water sorptivity and the concentration dependence of the hydraulic diffusion coefficient are calculated for samples prepared with a 0.5 w/c ratio and, therefore, an open pore structure. In the case of 0.3 w/c ratio samples, little water transport is observed, and a closed pore structure is inferred. (C) 1998 Elsevier Science Inc.

引用

页码：455 / 461

页数：7

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