Salt weathering in granitoids: an overview on the controlling factors
| Autor: | Siegfried Siegesmund, Luís Sousa, Wanja Wedekind |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Global and Planetary Change Ice formation Geochemistry Soil Science Salt (chemistry) Geology Weathering 010501 environmental sciences 010502 geochemistry & geophysics 01 natural sciences Pollution Durability chemistry Environmental Chemistry Environmental science Capillary water Porosity Biogeosciences 0105 earth and related environmental sciences Earth-Surface Processes Water Science and Technology |
| Zdroj: | Environmental Earth Sciences. 77 |
| ISSN: | 1866-6299 1866-6280 |
| DOI: | 10.1007/s12665-018-7669-y |
| Popis: | Historically granite is one of the most applied building materials worldwide. Building stones should accomplish several properties required by different testing materials standards. Salt weathering affects the aesthetical properties of the stones and eventually diminish their durability. The use of weathered granites has increased in the last several decades, but their behavior under adverse environmental conditions requires continued investigation. The use of salt for the prevention of ice formation in colder climates can have harmful consequences on high-porosity stones. Twenty-eight different stones, mostly granitoids, all of them often used as dimensional building stones, were subjected to the salt bursting test. The porosity and the pore network are important parameters in salt weathering; therefore, the pore radii distribution and capillary water uptake were measured. The capillary pores and related porosity are the main factors controlling the behavior of the studied stones under salt action. However, the pore radii size and distribution also plays an important role. In some cases, the salt action is only visible after a high number of test cycles, thus making the actual salt test standards unrealistic. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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