Study on the Strength Development of Cemented Backfill Body from Lead-Zinc Mine Tailings with Sulphide
The unconfined compressive strength (UCS) development of cemented backfill materials for lead-zinc mine tailings with sulphide was studied. The results showed that the UCS of the cemented backfill body with ordinary Portland cement (OPC) as binder decreased in the later curing days, regardless of pa...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/7278014 |
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| author | Juanrong Zheng Lijie Guo Xiaoxiao Sun Wenchen Li Qi Jia |
| author_facet | Juanrong Zheng Lijie Guo Xiaoxiao Sun Wenchen Li Qi Jia |
| author_sort | Juanrong Zheng |
| collection | DOAJ |
| description | The unconfined compressive strength (UCS) development of cemented backfill materials for lead-zinc mine tailings with sulphide was studied. The results showed that the UCS of the cemented backfill body with ordinary Portland cement (OPC) as binder decreased in the later curing days, regardless of particle size. Under the same conditions, the higher the OPC content, the higher the UCS of the cemented backfill body, and the UCS of the cemented backfill body began to decrease at the longer curing days. Under the same conditions, the finer the tailings, the lower the UCS of the cemented backfill body at each age, and the UCS of the cemented backfill body began to decrease at the earlier curing age. X-ray diffraction analysis (XRD) showed that the reduction of the UCS of the cemented backfill body was related to the formation of an expansive substance (expansive gypsum) in the cemented backfill body, which led to the cracking of the test sample. In the cemented backfill materials of coarse tailings of lead-zinc mine, the composite binder formed by OPC and calcined kaolin (CK) containing metakaolin was used; the amount of calcium hydroxide, the hydration product of cement, was reduced or eliminated due to the pozzolanic reaction of metakaolin; and the amount of expansive gypsum was reduced or eliminated, so the UCS of the cemented backfill body increased within 360 days of curing. |
| format | Article |
| id | doaj-art-b53e76c833db40bab7d410d5cff8ee90 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-b53e76c833db40bab7d410d5cff8ee902025-02-03T06:01:26ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422018-01-01201810.1155/2018/72780147278014Study on the Strength Development of Cemented Backfill Body from Lead-Zinc Mine Tailings with SulphideJuanrong Zheng0Lijie Guo1Xiaoxiao Sun2Wenchen Li3Qi Jia4College of Civil Engineering, Zhengzhou University, Zhengzhou, Henan 450002, ChinaBeijing General Research Institute of Mining and Metallurgy, Beijing 100160, ChinaCollege of Civil Engineering, Zhengzhou University, Zhengzhou, Henan 450002, ChinaBeijing General Research Institute of Mining and Metallurgy, Beijing 100160, ChinaDepartment of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, 971 87 Luleå, SwedenThe unconfined compressive strength (UCS) development of cemented backfill materials for lead-zinc mine tailings with sulphide was studied. The results showed that the UCS of the cemented backfill body with ordinary Portland cement (OPC) as binder decreased in the later curing days, regardless of particle size. Under the same conditions, the higher the OPC content, the higher the UCS of the cemented backfill body, and the UCS of the cemented backfill body began to decrease at the longer curing days. Under the same conditions, the finer the tailings, the lower the UCS of the cemented backfill body at each age, and the UCS of the cemented backfill body began to decrease at the earlier curing age. X-ray diffraction analysis (XRD) showed that the reduction of the UCS of the cemented backfill body was related to the formation of an expansive substance (expansive gypsum) in the cemented backfill body, which led to the cracking of the test sample. In the cemented backfill materials of coarse tailings of lead-zinc mine, the composite binder formed by OPC and calcined kaolin (CK) containing metakaolin was used; the amount of calcium hydroxide, the hydration product of cement, was reduced or eliminated due to the pozzolanic reaction of metakaolin; and the amount of expansive gypsum was reduced or eliminated, so the UCS of the cemented backfill body increased within 360 days of curing.http://dx.doi.org/10.1155/2018/7278014 |
| spellingShingle | Juanrong Zheng Lijie Guo Xiaoxiao Sun Wenchen Li Qi Jia Study on the Strength Development of Cemented Backfill Body from Lead-Zinc Mine Tailings with Sulphide Advances in Materials Science and Engineering |
| title | Study on the Strength Development of Cemented Backfill Body from Lead-Zinc Mine Tailings with Sulphide |
| title_full | Study on the Strength Development of Cemented Backfill Body from Lead-Zinc Mine Tailings with Sulphide |
| title_fullStr | Study on the Strength Development of Cemented Backfill Body from Lead-Zinc Mine Tailings with Sulphide |
| title_full_unstemmed | Study on the Strength Development of Cemented Backfill Body from Lead-Zinc Mine Tailings with Sulphide |
| title_short | Study on the Strength Development of Cemented Backfill Body from Lead-Zinc Mine Tailings with Sulphide |
| title_sort | study on the strength development of cemented backfill body from lead zinc mine tailings with sulphide |
| url | http://dx.doi.org/10.1155/2018/7278014 |
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