Characterizing saline uptake and salt distributions in porous limestone with neutron radiography and X-ray micro-tomography

被引：38

作者：

Derluyn, Hannelore ^{[1
,2
]}

Griffa, Michele ^{[2
]}

Mannes, David ^{[3
]}

Jerjen, Iwan ^{[2
]}

Dewanckele, Jan

Vontobel, Peter ^{[3
]}

Sheppard, Adrian ^{[5
]}

Derome, Dominique ^{[2
]}

Cnudde, Veerle ^{[4
]}

Lehmann, Eberhard ^{[3
]}

Carmeliet, Jan ^{[1
,2
]}

机构：

[1] ETH, Chair Bldg Phys, CH-8093 Zurich Honggerberg, Switzerland

[2] EMPA, Swiss Fed Labs Mat Sci & Technol, Dubendorf, Switzerland

[3] Paul Scherrer Inst, Spallat Neutron Source Div, Villigen, Switzerland

[4] Univ Ghent, SGIG UGCT, Dept Geol & Soil Sci, B-9000 Ghent, Belgium

[5] Australian Natl Univ, Res Sch Phys & Engn, Dept Appl Math, Canberra, ACT, Australia

来源：

JOURNAL OF BUILDING PHYSICS | 2013年 / 36卷 / 04期

基金：

澳大利亚研究理事会;

关键词：

Limestone; neutron radiography; X-ray micro-tomography; saline uptake; salt crystallization; FLOW;

D O I：

10.1177/1744259112473947

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Samples of Savonnieres limestone subjected to repeated wetting-drying cycles were investigated by both neutron radiography and X-ray micro-tomography to collect information on saline uptake and salt precipitation. Capillary uptake of water, 1.4 molal sodium sulphate and 5.8 molal sodium chloride solution was visualized with neutron radiography. The liquid penetration coefficients and diffusivities were determined and are markedly lower for the salt solutions than for water, due to the higher surface tension and viscosity of salt solutions. Halite distributions were derived from neutron radiographs. Porosity analysis of X-ray tomographic datasets allowed quantifying thenardite distributions and porosity decrease due to salt crystallization.

引用

页码：353 / 374

页数：22

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