Stuck（uの頭に¨）,H., Forgo（後のoの頭に´）,L.Z., Rudrich（uの頭に¨）,J., Siegesmund,S. and Torok（両方のoの頭に¨）,A（頭に´）.(2008): The behaviour of consolidated volcanic tuffs: weathering mechanisms under simulated laboratory conditions. Environ.Geol., 56, 699-713.

『固化した火山凝灰岩の挙動：シミュレートした実験室条件下での風化メカニズム』

『Abstract
　Five volcanic tuffs ranging from dacitic tuffs of Hungary to rhyolite, phonolite and basaltic tuffs of Germany were consolidated under laboratory conditions. Prior to consolidation an anti-hygro, a hydrous consolidant, which reduces the swelling ability of clay minerals, was applied. The three consolidants, a silicic acid ester (SAE), an elastic silicic acid ester (eSAE) and an acrylate resin (PMMA) were applied on test specimens under vacuum. Petrographic characterisation (Polarizing microscopy, XRD, SEM) provided data for fabric analyses and the mineral composition of the tuffs. Changes in fabric, effective porosity, density, tensile strength, ultrasonic wave velocity were evaluated after the treatment. Weathering simulation tests such as hygric dilatation and thermal dilatation aimed to prove the effectiveness of consolidation and the durability of consolidated tuff samples. more than 500 samples were analysed. The tests showed that SAE caused the highest increase in indirect tensile strength. The water absorption and the pore size distribution of the tuffs were modified by consolidation. The PMMA reduced the water absorption the most, whereas SAE modified it the least. All the tested consolidants increased the thermal dilatation of the tuffs. The changes in hygric dilatation were not uniform: for most tuffs SAE increased and PMMA decreased the hygric dilatation, although the clay-rich Habichtswald tuff showed the opposite trends. The changes in hygric and thermal behaviour of consolidated tuff require special care when specific consolidants are chosen. These products modify the physical properties of consolidated tuffs and changes the behaviour of weathering.

Keywords: Strengthening agents; Tuff; Silicic acid ester; PMMA; Durability 』

Introduction
Materials
　Stones
　Weathering forms
　Products
Methods
　Experiments
　Analyses
Results
　SEM analyses
　Pore-size distribution
　Water and moisture uptake
　Tensile strength
　Ultrasonic wave velocities
　Hygric dilatation
　Thermal dilatation
Discussion
Conclusions
Acknowledgments
Open Access
References

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