A new method for testing thermal shock resistance properties of soapstone – Effects of microstructures and mineralogical variables
Soapstone industry utilizes different types of soapstone mainly as a construction material for fireplaces. In this application soapstone has to meet different temperature requirements in different parts of fireplaces. Mineralogical and structural information is needed for placing an appropriate type...
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| Format: | Article |
| Language: | English |
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Geological Society of Finland
2016-09-01
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| Series: | Bulletin of the Geological Society of Finland |
| Subjects: | |
| Online Access: | http://www.geologinenseura.fi/bulletin/Volume88/Bulletin_vol88_1_2016_Huhta.pdf |
| _version_ | 1818606653408280576 |
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| author | A. Huhta A. Kärki E. Hanski |
| author_facet | A. Huhta A. Kärki E. Hanski |
| author_sort | A. Huhta |
| collection | DOAJ |
| description | Soapstone industry utilizes different types of soapstone mainly as a construction material for fireplaces. In this application soapstone has to meet different temperature requirements in different parts of fireplaces. Mineralogical and structural information is needed for placing an appropriate type of soapstone in an appropriate position in the fireplace construction. This allows employment of higher temperatures resulting in more particulate-free combustion, which makes it possible for soapstone industry to develop more efficient and environmentally friendly fireplaces. Of many soapstone types, which differ from each other in their chemical composition and thermal properties, carbonate soapstone and its microstructural variations were investigated in this study. A new method was developed to measure thermal shock resistant of natural stones. By exposing carbonate soapstone samples of different textural types to rapid temperature changes, it was possible to determine the parameters that affect the capacity of the rock to resist thermal shock. The results indicate that the type of microtexture is an important factor in controlling the thermal shock resistance of carbonate soapstone. The soapstone samples with a high thermal shock resistance show deformation textures, such as crenulation cleavage and S/C mylonite. A strong negative correlation was observed between the thermal shock resistance and length of cleavage domains in foliated rocks. Also a slight elevation in the iron concentration of talc and magnesite was discovered to improve the thermal shock resistance of carbonate soapstone. Attention should especially be paid to the length and planarity of cleavage domains of spaced foliation. |
| first_indexed | 2024-12-16T14:14:16Z |
| format | Article |
| id | doaj.art-bee934a73fb04d53a6dea8f95d844203 |
| institution | Directory Open Access Journal |
| issn | 0367-5211 1799-4632 |
| language | English |
| last_indexed | 2024-12-16T14:14:16Z |
| publishDate | 2016-09-01 |
| publisher | Geological Society of Finland |
| record_format | Article |
| series | Bulletin of the Geological Society of Finland |
| spelling | doaj.art-bee934a73fb04d53a6dea8f95d8442032022-12-21T22:28:40ZengGeological Society of FinlandBulletin of the Geological Society of Finland0367-52111799-46322016-09-01881214610.17741/bgsf/88.1.002A new method for testing thermal shock resistance properties of soapstone – Effects of microstructures and mineralogical variablesA. HuhtaA. KärkiE. HanskiSoapstone industry utilizes different types of soapstone mainly as a construction material for fireplaces. In this application soapstone has to meet different temperature requirements in different parts of fireplaces. Mineralogical and structural information is needed for placing an appropriate type of soapstone in an appropriate position in the fireplace construction. This allows employment of higher temperatures resulting in more particulate-free combustion, which makes it possible for soapstone industry to develop more efficient and environmentally friendly fireplaces. Of many soapstone types, which differ from each other in their chemical composition and thermal properties, carbonate soapstone and its microstructural variations were investigated in this study. A new method was developed to measure thermal shock resistant of natural stones. By exposing carbonate soapstone samples of different textural types to rapid temperature changes, it was possible to determine the parameters that affect the capacity of the rock to resist thermal shock. The results indicate that the type of microtexture is an important factor in controlling the thermal shock resistance of carbonate soapstone. The soapstone samples with a high thermal shock resistance show deformation textures, such as crenulation cleavage and S/C mylonite. A strong negative correlation was observed between the thermal shock resistance and length of cleavage domains in foliated rocks. Also a slight elevation in the iron concentration of talc and magnesite was discovered to improve the thermal shock resistance of carbonate soapstone. Attention should especially be paid to the length and planarity of cleavage domains of spaced foliation.http://www.geologinenseura.fi/bulletin/Volume88/Bulletin_vol88_1_2016_Huhta.pdfcrenulation cleavagemicrostructuresoapstoneS/C mylonitetexturethermal shock resistance |
| spellingShingle | A. Huhta A. Kärki E. Hanski A new method for testing thermal shock resistance properties of soapstone – Effects of microstructures and mineralogical variables Bulletin of the Geological Society of Finland crenulation cleavage microstructure soapstone S/C mylonite texture thermal shock resistance |
| title | A new method for testing thermal shock resistance properties of soapstone – Effects of microstructures and mineralogical variables |
| title_full | A new method for testing thermal shock resistance properties of soapstone – Effects of microstructures and mineralogical variables |
| title_fullStr | A new method for testing thermal shock resistance properties of soapstone – Effects of microstructures and mineralogical variables |
| title_full_unstemmed | A new method for testing thermal shock resistance properties of soapstone – Effects of microstructures and mineralogical variables |
| title_short | A new method for testing thermal shock resistance properties of soapstone – Effects of microstructures and mineralogical variables |
| title_sort | new method for testing thermal shock resistance properties of soapstone effects of microstructures and mineralogical variables |
| topic | crenulation cleavage microstructure soapstone S/C mylonite texture thermal shock resistance |
| url | http://www.geologinenseura.fi/bulletin/Volume88/Bulletin_vol88_1_2016_Huhta.pdf |
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