Journal ArticleDOI
Wetting and drying of masonry walls: 2D-resistivity monitoring of driving rain experiments on historic stonework in Oxford, UK
Oliver Sass,Heather Viles +1 more
TLDR
In this paper, a series of experiments on historic walls within the centre of Oxford, UK, which illustrate varying degrees of deterioration (including the formation of gypsum-rich black crusts and exfoliating hollows) using medical electrodes was carried out before and after simulated rainfall to investigate the progress of wetting and drying.About:
This article is published in Journal of Applied Geophysics.The article was published on 2010-01-01. It has received 61 citations till now. The article focuses on the topics: Moisture.read more
Citations
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Journal ArticleDOI
Methods for measuring rock surface weathering and erosion: A critical review
TL;DR: In this article, a review of field and laboratory methods used by geomorphologists to monitor and measure the impact of exposure and erosion on physical and mechanical properties of exposed rock surfaces and their immediate subsurface is presented.
Book ChapterDOI
Geophysical Properties of the Near Surface Earth: Electrical Properties
TL;DR: In this paper, the basic electrical theory of geomaterials is set out together with sufficient experimental and modeling results to show what controls their electrical properties, including steady-state and frequency-dependent electrical transport and polarization.
Journal ArticleDOI
Algal 'greening' and the conservation of stone heritage structures.
TL;DR: The findings suggested that greening had little impact on the physical integrity of stone; indeed the influence of algae on moisture regimes in stone may have a broadly bioprotective action.
Journal ArticleDOI
A review on freeze-thaw action and weathering of rocks
TL;DR: In this article, a series of laboratory and in-situ field tests are presented to illustrate the present-day methods to assess freeze-thaw weathering, which led to insights and the development of theories on damage mechanisms.
Journal ArticleDOI
The role of rock surface hardness and internal moisture in tafoni development in sandstone
TL;DR: In this article, electric resistivity tomography (ERT) has been used to map moisture distribution within inner walls of tafoni developed in sandstone, and an Equotip device used to measure rock surface hardness as a proxy measure of the degree of weathering and case hardening.
References
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Journal ArticleDOI
The electrical resistivity log as an aid in determining some reservoir characteristics
TL;DR: The usefulness of the electrical resistivity log in determining reservoir characteristics is governed largely by: (1) the accuracy with which the true resistivity of the formation can be determined; (2) the scope of detailed data concerning the relation of resistivity measurements to formation characteristics; (3) the available information concerning the conductivity of connate or formation waters; and (4) the extent of geologic knowledge regarding probable changes in facies within given horizons, both vertically and laterally, particularly in relation to the resultant effect on the electrical properties of the reservoir as mentioned in this paper.
Book ChapterDOI
DC Resistivity and Induced Polarization Methods
Andrew Binley,Andreas Kemna +1 more
TL;DR: In this paper, the relationship between direct current resistivity and hydrological properties, such as porosity and moisture content, is investigated. But the applications of induced polarization methods in hydrogeophysics have been limited.
Journal ArticleDOI
Least-squares deconvolution of apparent resistivity pseudosections
M. H. Loke,R. D. Barker +1 more
TL;DR: In this article, a smoothness-constrained least square method is used to produce a 2D subsurface model free of distortions in the apparent resistivity pseudosection caused by the electrode array geometry used.