Effect of Air Entrainment on Cemented Mine Backfill Properties: Analysis Based on Response Surface Methodology
As part of an extensive research program exploring the potential benefits of using air-entraining admixtures in mine backfill, the experimental study presented in this paper investigates the effect of cement and entrained air dosages on mine backfill unconfined compressive strength (UCS), fresh dens...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-01-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/11/1/81 |
| _version_ | 1797411117882933248 |
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| author | Mohammed Hefni Ferri Hassani |
| author_facet | Mohammed Hefni Ferri Hassani |
| author_sort | Mohammed Hefni |
| collection | DOAJ |
| description | As part of an extensive research program exploring the potential benefits of using air-entraining admixtures in mine backfill, the experimental study presented in this paper investigates the effect of cement and entrained air dosages on mine backfill unconfined compressive strength (UCS), fresh density, and dry density. Backfill specimens were prepared using silica sand, normal Portland cement, water, and an entrained air admixture. An experimental design with response surface methodology was adopted to develop predictive mathematical models and analyze the results. The results demonstrated that an entrained air dosage of 3.5% could improve the UCS of the mine backfill owing to better dispersion of cement particles. However, a further increase in the dosage reduced the UCS as well as the fresh and dry densities by approximately 200 and 120 kg/m<sup>3</sup>, respectively. Study results imply that using air-entraining admixtures can potentially enhance mine backfill flowability and reduce the density, thus providing safer and more sustainable working conditions in an underground mining environment. |
| first_indexed | 2024-03-09T04:40:23Z |
| format | Article |
| id | doaj.art-c8ffdde52bca43da86d3940c98d4fe7d |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-09T04:40:23Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-c8ffdde52bca43da86d3940c98d4fe7d2023-12-03T13:22:39ZengMDPI AGMinerals2075-163X2021-01-011118110.3390/min11010081Effect of Air Entrainment on Cemented Mine Backfill Properties: Analysis Based on Response Surface MethodologyMohammed Hefni0Ferri Hassani1Mining Engineering Department, King Abdulaziz University, Jeddah 21589, Saudi ArabiaDepartment of Mining and Materials Engineering, McGill University, Montreal, QC H3A 0C5, CanadaAs part of an extensive research program exploring the potential benefits of using air-entraining admixtures in mine backfill, the experimental study presented in this paper investigates the effect of cement and entrained air dosages on mine backfill unconfined compressive strength (UCS), fresh density, and dry density. Backfill specimens were prepared using silica sand, normal Portland cement, water, and an entrained air admixture. An experimental design with response surface methodology was adopted to develop predictive mathematical models and analyze the results. The results demonstrated that an entrained air dosage of 3.5% could improve the UCS of the mine backfill owing to better dispersion of cement particles. However, a further increase in the dosage reduced the UCS as well as the fresh and dry densities by approximately 200 and 120 kg/m<sup>3</sup>, respectively. Study results imply that using air-entraining admixtures can potentially enhance mine backfill flowability and reduce the density, thus providing safer and more sustainable working conditions in an underground mining environment.https://www.mdpi.com/2075-163X/11/1/81backfillair entrainmentunconfined compressive strengthresponse surface methodologydensity |
| spellingShingle | Mohammed Hefni Ferri Hassani Effect of Air Entrainment on Cemented Mine Backfill Properties: Analysis Based on Response Surface Methodology Minerals backfill air entrainment unconfined compressive strength response surface methodology density |
| title | Effect of Air Entrainment on Cemented Mine Backfill Properties: Analysis Based on Response Surface Methodology |
| title_full | Effect of Air Entrainment on Cemented Mine Backfill Properties: Analysis Based on Response Surface Methodology |
| title_fullStr | Effect of Air Entrainment on Cemented Mine Backfill Properties: Analysis Based on Response Surface Methodology |
| title_full_unstemmed | Effect of Air Entrainment on Cemented Mine Backfill Properties: Analysis Based on Response Surface Methodology |
| title_short | Effect of Air Entrainment on Cemented Mine Backfill Properties: Analysis Based on Response Surface Methodology |
| title_sort | effect of air entrainment on cemented mine backfill properties analysis based on response surface methodology |
| topic | backfill air entrainment unconfined compressive strength response surface methodology density |
| url | https://www.mdpi.com/2075-163X/11/1/81 |
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