Direct Tensile Measurement for Cemented Paste Backfill
Tensile strength is a crucial parameter involved in the design and analysis of cemented paste backfill (CPB). The ability of CPB to withstand tensile forces is essential for the stability of the backfilled stopes, particularly in areas with high stress or deformation. The tensile strength is a criti...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-09-01
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| Series: | Minerals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-163X/13/9/1218 |
| _version_ | 1797578675819905024 |
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| author | Andrew Pan Murray Grabinsky |
| author_facet | Andrew Pan Murray Grabinsky |
| author_sort | Andrew Pan |
| collection | DOAJ |
| description | Tensile strength is a crucial parameter involved in the design and analysis of cemented paste backfill (CPB). The ability of CPB to withstand tensile forces is essential for the stability of the backfilled stopes, particularly in areas with high stress or deformation. The tensile strength is a critical design parameter used in sill mats to perform underhand cut-and-fill operations. This study presents a novel technique that utilizes rectangular dog-bone specimens and compression to tensile load converters to perform the direct determination of tensile strength. This study indicates that the prevailing assumption regarding the ratio of unconfined compressive strength (UCS) to tensile strength (i.e., 10:1 or 12:1) underestimates the strength. The results suggest a ratio closer to 3:1 or 4:1. The findings indicate that the ratio varies with the curing interval. Specifically, the tensile-to-compressive strength ratios were higher in early-age specimens, as tensile strength values do not increase at the same rate as those of compressive strength. This disparity has notable implications, as underestimating tensile strength via traditional UCS-to-tensile strength ratios could potentially inflate binder consumption. Our study underscores the importance of using direct tensile strength measurements to optimize mining operations. |
| first_indexed | 2024-03-10T22:26:08Z |
| format | Article |
| id | doaj.art-6e61b0b59b1b4f99b4fca0421d3fac77 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-10T22:26:08Z |
| publishDate | 2023-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-6e61b0b59b1b4f99b4fca0421d3fac772023-11-19T12:05:58ZengMDPI AGMinerals2075-163X2023-09-01139121810.3390/min13091218Direct Tensile Measurement for Cemented Paste BackfillAndrew Pan0Murray Grabinsky1Department of Civil and Mineral Engineering, University of Toronto, Toronto, ON M5S 1A4, CanadaDepartment of Civil and Mineral Engineering, University of Toronto, Toronto, ON M5S 1A4, CanadaTensile strength is a crucial parameter involved in the design and analysis of cemented paste backfill (CPB). The ability of CPB to withstand tensile forces is essential for the stability of the backfilled stopes, particularly in areas with high stress or deformation. The tensile strength is a critical design parameter used in sill mats to perform underhand cut-and-fill operations. This study presents a novel technique that utilizes rectangular dog-bone specimens and compression to tensile load converters to perform the direct determination of tensile strength. This study indicates that the prevailing assumption regarding the ratio of unconfined compressive strength (UCS) to tensile strength (i.e., 10:1 or 12:1) underestimates the strength. The results suggest a ratio closer to 3:1 or 4:1. The findings indicate that the ratio varies with the curing interval. Specifically, the tensile-to-compressive strength ratios were higher in early-age specimens, as tensile strength values do not increase at the same rate as those of compressive strength. This disparity has notable implications, as underestimating tensile strength via traditional UCS-to-tensile strength ratios could potentially inflate binder consumption. Our study underscores the importance of using direct tensile strength measurements to optimize mining operations.https://www.mdpi.com/2075-163X/13/9/1218cemented paste backfilldirect tensiledog-bone specimenunderhand cut-and-fill |
| spellingShingle | Andrew Pan Murray Grabinsky Direct Tensile Measurement for Cemented Paste Backfill Minerals cemented paste backfill direct tensile dog-bone specimen underhand cut-and-fill |
| title | Direct Tensile Measurement for Cemented Paste Backfill |
| title_full | Direct Tensile Measurement for Cemented Paste Backfill |
| title_fullStr | Direct Tensile Measurement for Cemented Paste Backfill |
| title_full_unstemmed | Direct Tensile Measurement for Cemented Paste Backfill |
| title_short | Direct Tensile Measurement for Cemented Paste Backfill |
| title_sort | direct tensile measurement for cemented paste backfill |
| topic | cemented paste backfill direct tensile dog-bone specimen underhand cut-and-fill |
| url | https://www.mdpi.com/2075-163X/13/9/1218 |
| work_keys_str_mv | AT andrewpan directtensilemeasurementforcementedpastebackfill AT murraygrabinsky directtensilemeasurementforcementedpastebackfill |