Evaluation of Rheological Parameters of Slag-Based Paste Backfill with Superplasticizer
The use of blast furnace slag-based binders in cemented paste backfill (CPB) has become increasingly popular in China, due to its low cost and superior early-age strength. Increasing the solid content can increase the strength of CPB, but it will lead to a decrease in its fluidity. As a chemical adm...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2021/6673033 |
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| author | Zhonghui Zhang Yuanhui Li Lei Ren Zhenbang Guo Haiqiang Jiang Na Liu |
| author_facet | Zhonghui Zhang Yuanhui Li Lei Ren Zhenbang Guo Haiqiang Jiang Na Liu |
| author_sort | Zhonghui Zhang |
| collection | DOAJ |
| description | The use of blast furnace slag-based binders in cemented paste backfill (CPB) has become increasingly popular in China, due to its low cost and superior early-age strength. Increasing the solid content can increase the strength of CPB, but it will lead to a decrease in its fluidity. As a chemical admixture that can improve CPB slurry fluidity, superplasticizer is gaining increased interest in the field of CPB. In this study, the effects of superplasticizer types and dosages, curing time, solid content, and binder content on the rheological properties of fresh CPB made of blast furnace slag-based binder (Slag-CPB) were studied. For Slag-CPB samples, polycarboxylate (PC) has the best water-reducing effect, followed by polymelamine sulfonate (PMS) and polynaphthalene sulfonate (PNS). In the absence of a superplasticizer, the shear yield stress and plastic viscosity of Slag-CPB are lower than those of CPB made of ordinary Portland cement (OPC-CPB). The water-reducing effect of PC on OPC-CPBs samples is stronger than that of Slag-CPB samples. The degradation rate of the water-reducing effect in slag-based samples is higher than that in cement-based samples. The effect of PC is affected by solid content and binder content. These results will contribute to a better understanding of the rheological behavior of Slag-CPB with superplasticizer. |
| format | Article |
| id | doaj-art-0aad5d8d91a749e49b66f54f1301b9a5 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
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| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-0aad5d8d91a749e49b66f54f1301b9a52025-02-03T05:49:17ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422021-01-01202110.1155/2021/66730336673033Evaluation of Rheological Parameters of Slag-Based Paste Backfill with SuperplasticizerZhonghui Zhang0Yuanhui Li1Lei Ren2Zhenbang Guo3Haiqiang Jiang4Na Liu5Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, Northeastern University, Shenyang 110819, ChinaKey Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, Northeastern University, Shenyang 110819, ChinaKey Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, Northeastern University, Shenyang 110819, ChinaKey Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, Northeastern University, Shenyang 110819, ChinaKey Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, Northeastern University, Shenyang 110819, ChinaShenyang Ecological Environment Monitoring Center of Liaoning Province, Shenyang 110819, ChinaThe use of blast furnace slag-based binders in cemented paste backfill (CPB) has become increasingly popular in China, due to its low cost and superior early-age strength. Increasing the solid content can increase the strength of CPB, but it will lead to a decrease in its fluidity. As a chemical admixture that can improve CPB slurry fluidity, superplasticizer is gaining increased interest in the field of CPB. In this study, the effects of superplasticizer types and dosages, curing time, solid content, and binder content on the rheological properties of fresh CPB made of blast furnace slag-based binder (Slag-CPB) were studied. For Slag-CPB samples, polycarboxylate (PC) has the best water-reducing effect, followed by polymelamine sulfonate (PMS) and polynaphthalene sulfonate (PNS). In the absence of a superplasticizer, the shear yield stress and plastic viscosity of Slag-CPB are lower than those of CPB made of ordinary Portland cement (OPC-CPB). The water-reducing effect of PC on OPC-CPBs samples is stronger than that of Slag-CPB samples. The degradation rate of the water-reducing effect in slag-based samples is higher than that in cement-based samples. The effect of PC is affected by solid content and binder content. These results will contribute to a better understanding of the rheological behavior of Slag-CPB with superplasticizer.http://dx.doi.org/10.1155/2021/6673033 |
| spellingShingle | Zhonghui Zhang Yuanhui Li Lei Ren Zhenbang Guo Haiqiang Jiang Na Liu Evaluation of Rheological Parameters of Slag-Based Paste Backfill with Superplasticizer Advances in Materials Science and Engineering |
| title | Evaluation of Rheological Parameters of Slag-Based Paste Backfill with Superplasticizer |
| title_full | Evaluation of Rheological Parameters of Slag-Based Paste Backfill with Superplasticizer |
| title_fullStr | Evaluation of Rheological Parameters of Slag-Based Paste Backfill with Superplasticizer |
| title_full_unstemmed | Evaluation of Rheological Parameters of Slag-Based Paste Backfill with Superplasticizer |
| title_short | Evaluation of Rheological Parameters of Slag-Based Paste Backfill with Superplasticizer |
| title_sort | evaluation of rheological parameters of slag based paste backfill with superplasticizer |
| url | http://dx.doi.org/10.1155/2021/6673033 |
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