Backfilling behavior of a mixed aggregate based on construction waste and ultrafine tailings.
To study the possibility of utilizing mixed construction waste and ultrafine tailings (CW&UT) as a backfilling aggregate that can be placed underground in a mine, physicochemical evaluation, proportioning strength tests, and pumpability experiments were conducted. It was revealed that mixed CW&a...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2017-01-01
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| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC5491071?pdf=render |
| _version_ | 1818283664029515776 |
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| author | Qiusong Chen Qinli Zhang Chongchun Xiao Xin Chen |
| author_facet | Qiusong Chen Qinli Zhang Chongchun Xiao Xin Chen |
| author_sort | Qiusong Chen |
| collection | DOAJ |
| description | To study the possibility of utilizing mixed construction waste and ultrafine tailings (CW&UT) as a backfilling aggregate that can be placed underground in a mine, physicochemical evaluation, proportioning strength tests, and pumpability experiments were conducted. It was revealed that mixed CW&UT can be used as a backfilling aggregate due to the complementarities of their physicochemical properties. In addition, as the results of the proportioning strength tests show, the compressive strength of a cemented CW&UT backfilling specimen cured for 28 days, with a mass fraction of 72-74%, a cement-sand ratio of 1:12, and a CW proportion of 30%, is higher than 1.0 MPa, which meets the safety requirements and economic consideration of backfilling technology in many underground metal mines, and can also be enhanced with an increase in the cement-sand ratio. The results of the pumpability experiments show that cemented backfilling slurry based on CW&UT can be transported to the stope underground with a common filling pump, with a 16.6 MPa maximum pressure, with the condition that the time of emergency shut-down is less than approximately 20 min. All in all, the research to utilize mixed CW&UT as a backfilling aggregate can not only provide a way to dispose of CW&UT but also will bring large economic benefits and can provide constructive guidance for environmental protection. |
| first_indexed | 2024-12-13T00:40:30Z |
| format | Article |
| id | doaj.art-aed396b952f5487db6e735702e6e6a84 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-13T00:40:30Z |
| publishDate | 2017-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-aed396b952f5487db6e735702e6e6a842022-12-22T00:05:08ZengPublic Library of Science (PLoS)PLoS ONE1932-62032017-01-01126e017987210.1371/journal.pone.0179872Backfilling behavior of a mixed aggregate based on construction waste and ultrafine tailings.Qiusong ChenQinli ZhangChongchun XiaoXin ChenTo study the possibility of utilizing mixed construction waste and ultrafine tailings (CW&UT) as a backfilling aggregate that can be placed underground in a mine, physicochemical evaluation, proportioning strength tests, and pumpability experiments were conducted. It was revealed that mixed CW&UT can be used as a backfilling aggregate due to the complementarities of their physicochemical properties. In addition, as the results of the proportioning strength tests show, the compressive strength of a cemented CW&UT backfilling specimen cured for 28 days, with a mass fraction of 72-74%, a cement-sand ratio of 1:12, and a CW proportion of 30%, is higher than 1.0 MPa, which meets the safety requirements and economic consideration of backfilling technology in many underground metal mines, and can also be enhanced with an increase in the cement-sand ratio. The results of the pumpability experiments show that cemented backfilling slurry based on CW&UT can be transported to the stope underground with a common filling pump, with a 16.6 MPa maximum pressure, with the condition that the time of emergency shut-down is less than approximately 20 min. All in all, the research to utilize mixed CW&UT as a backfilling aggregate can not only provide a way to dispose of CW&UT but also will bring large economic benefits and can provide constructive guidance for environmental protection.http://europepmc.org/articles/PMC5491071?pdf=render |
| spellingShingle | Qiusong Chen Qinli Zhang Chongchun Xiao Xin Chen Backfilling behavior of a mixed aggregate based on construction waste and ultrafine tailings. PLoS ONE |
| title | Backfilling behavior of a mixed aggregate based on construction waste and ultrafine tailings. |
| title_full | Backfilling behavior of a mixed aggregate based on construction waste and ultrafine tailings. |
| title_fullStr | Backfilling behavior of a mixed aggregate based on construction waste and ultrafine tailings. |
| title_full_unstemmed | Backfilling behavior of a mixed aggregate based on construction waste and ultrafine tailings. |
| title_short | Backfilling behavior of a mixed aggregate based on construction waste and ultrafine tailings. |
| title_sort | backfilling behavior of a mixed aggregate based on construction waste and ultrafine tailings |
| url | http://europepmc.org/articles/PMC5491071?pdf=render |
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