NANOINDENTATION AND ACCELERATED PROPERTY MAPPING OF PORTLAND CEMENT PASTE
This paper presents a new nanoindentation mode: accelerated property mapping (XPM) applied to one year old Portland cement paste. The principle of the innovative method is similar to classical quasi-static nanoindentation but the time necessary for performing one indent is significantly decreased fr...
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| Format: | Article |
| Language: | English |
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Czech Technical University in Prague
2020-06-01
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| Series: | Acta Polytechnica CTU Proceedings |
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| Online Access: | https://ojs.cvut.cz/ojs/index.php/APP/article/view/6696 |
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| author | Jiří Němeček Jiří Němeček Jaroslav Lukeš |
| author_facet | Jiří Němeček Jiří Němeček Jaroslav Lukeš |
| author_sort | Jiří Němeček |
| collection | DOAJ |
| description | This paper presents a new nanoindentation mode: accelerated property mapping (XPM) applied to one year old Portland cement paste. The principle of the innovative method is similar to classical quasi-static nanoindentation but the time necessary for performing one indent is significantly decreased from minutes to tenths of seconds. The XPM mode is capable of measuring maps of local mechanical properties (reduced modulus, hardness). The method was compared to classical nanoindentation mode. The main advantages of XPM measurement are higher spatial resolution, lower property fluctuation and lower acquisition time. However, XPM is not able to measure some parameters such as creep. Also, high speed loading of XPM brings high strain effect which artificially shifts values of reduced modulus to higher values compared to quasi-static loading cases. |
| format | Article |
| id | doaj-art-a358a187ab24484fa937fa87712a6d8f |
| institution | Kabale University |
| issn | 2336-5382 |
| language | English |
| publishDate | 2020-06-01 |
| publisher | Czech Technical University in Prague |
| record_format | Article |
| series | Acta Polytechnica CTU Proceedings |
| spelling | doaj-art-a358a187ab24484fa937fa87712a6d8f2025-08-20T03:56:59ZengCzech Technical University in PragueActa Polytechnica CTU Proceedings2336-53822020-06-012709610010.14311/APP.2020.27.00965226NANOINDENTATION AND ACCELERATED PROPERTY MAPPING OF PORTLAND CEMENT PASTEJiří Němeček0Jiří Němeček1Jaroslav Lukeš2Czech Technical University in Prague, Faculty of Civil Engineering, Department of Mechanics, Thákurova 7, 166 29 Prague 6, Czech RepublicCzech Technical University in Prague, Faculty of Civil Engineering, Department of Mechanics, Thákurova 7, 166 29 Prague 6, Czech RepublicCzech Technical University in Prague, Faculty of Mechanical Engineering, Department of Mechanics, Biomechanics and Mechatronics, Czech RepublicThis paper presents a new nanoindentation mode: accelerated property mapping (XPM) applied to one year old Portland cement paste. The principle of the innovative method is similar to classical quasi-static nanoindentation but the time necessary for performing one indent is significantly decreased from minutes to tenths of seconds. The XPM mode is capable of measuring maps of local mechanical properties (reduced modulus, hardness). The method was compared to classical nanoindentation mode. The main advantages of XPM measurement are higher spatial resolution, lower property fluctuation and lower acquisition time. However, XPM is not able to measure some parameters such as creep. Also, high speed loading of XPM brings high strain effect which artificially shifts values of reduced modulus to higher values compared to quasi-static loading cases.https://ojs.cvut.cz/ojs/index.php/APP/article/view/6696cement paste, high speed nanoindentation, strain rate, xpm |
| spellingShingle | Jiří Němeček Jiří Němeček Jaroslav Lukeš NANOINDENTATION AND ACCELERATED PROPERTY MAPPING OF PORTLAND CEMENT PASTE Acta Polytechnica CTU Proceedings cement paste, high speed nanoindentation, strain rate, xpm |
| title | NANOINDENTATION AND ACCELERATED PROPERTY MAPPING OF PORTLAND CEMENT PASTE |
| title_full | NANOINDENTATION AND ACCELERATED PROPERTY MAPPING OF PORTLAND CEMENT PASTE |
| title_fullStr | NANOINDENTATION AND ACCELERATED PROPERTY MAPPING OF PORTLAND CEMENT PASTE |
| title_full_unstemmed | NANOINDENTATION AND ACCELERATED PROPERTY MAPPING OF PORTLAND CEMENT PASTE |
| title_short | NANOINDENTATION AND ACCELERATED PROPERTY MAPPING OF PORTLAND CEMENT PASTE |
| title_sort | nanoindentation and accelerated property mapping of portland cement paste |
| topic | cement paste, high speed nanoindentation, strain rate, xpm |
| url | https://ojs.cvut.cz/ojs/index.php/APP/article/view/6696 |
| work_keys_str_mv | AT jirinemecek nanoindentationandacceleratedpropertymappingofportlandcementpaste AT jirinemecek nanoindentationandacceleratedpropertymappingofportlandcementpaste AT jaroslavlukes nanoindentationandacceleratedpropertymappingofportlandcementpaste |