Effective surface preparation technique for cementitious samples in nanoindentation testing
The nanomechanical properties of cementitious materials determined by nanoindentation largely depend on the surface roughness and intrinsicmaterial porosity of the samples. Studies have shown that high surface roughness causes an overall reduction in themeasured indentationmodulus and hardness. Ther...
| Main Authors: | , |
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| Format: | Journal Article |
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AMER SOC TESTING MATERIALS
2017
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| Online Access: | http://hdl.handle.net/20.500.11937/67244 |
| _version_ | 1848761515098767360 |
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| author | Chow, P. Barbhuiya, Salim |
| author_facet | Chow, P. Barbhuiya, Salim |
| author_sort | Chow, P. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The nanomechanical properties of cementitious materials determined by nanoindentation largely depend on the surface roughness and intrinsicmaterial porosity of the samples. Studies have shown that high surface roughness causes an overall reduction in themeasured indentationmodulus and hardness. Therefore, it is important to reduce the surface roughness to a desirable value by means of polishing. However, polishing causes damage to the cementmatrix. Thus, the most challenging task is to obtain a reasonable surface roughness with minimumdisturbance to themicrostructure of the samples. This paper discusses an effective surface preparation technique that wouldmeet the roughness criteria for nanoindentation. With the application of Taguchimethod, the optimumparameter combinations and relative contributions of various controlling factors such as force, speed, and time of polishing were determined. A second-order response surfacemodel was developed based on signal to noise ratio to establish the relationship between the controlling factors and surface roughness. Finally, the predicted surface roughness values from both Taguchi method and response surfacemodel were compared with the experimental values of the optimized confirmation runs and a good agreement was achieved. |
| first_indexed | 2025-11-14T10:32:54Z |
| format | Journal Article |
| id | curtin-20.500.11937-67244 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:32:54Z |
| publishDate | 2017 |
| publisher | AMER SOC TESTING MATERIALS |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-672442018-12-03T03:49:04Z Effective surface preparation technique for cementitious samples in nanoindentation testing Chow, P. Barbhuiya, Salim The nanomechanical properties of cementitious materials determined by nanoindentation largely depend on the surface roughness and intrinsicmaterial porosity of the samples. Studies have shown that high surface roughness causes an overall reduction in themeasured indentationmodulus and hardness. Therefore, it is important to reduce the surface roughness to a desirable value by means of polishing. However, polishing causes damage to the cementmatrix. Thus, the most challenging task is to obtain a reasonable surface roughness with minimumdisturbance to themicrostructure of the samples. This paper discusses an effective surface preparation technique that wouldmeet the roughness criteria for nanoindentation. With the application of Taguchimethod, the optimumparameter combinations and relative contributions of various controlling factors such as force, speed, and time of polishing were determined. A second-order response surfacemodel was developed based on signal to noise ratio to establish the relationship between the controlling factors and surface roughness. Finally, the predicted surface roughness values from both Taguchi method and response surfacemodel were compared with the experimental values of the optimized confirmation runs and a good agreement was achieved. 2017 Journal Article http://hdl.handle.net/20.500.11937/67244 10.1520/ACEM20160027 AMER SOC TESTING MATERIALS restricted |
| spellingShingle | Chow, P. Barbhuiya, Salim Effective surface preparation technique for cementitious samples in nanoindentation testing |
| title | Effective surface preparation technique for cementitious samples in nanoindentation testing |
| title_full | Effective surface preparation technique for cementitious samples in nanoindentation testing |
| title_fullStr | Effective surface preparation technique for cementitious samples in nanoindentation testing |
| title_full_unstemmed | Effective surface preparation technique for cementitious samples in nanoindentation testing |
| title_short | Effective surface preparation technique for cementitious samples in nanoindentation testing |
| title_sort | effective surface preparation technique for cementitious samples in nanoindentation testing |
| url | http://hdl.handle.net/20.500.11937/67244 |