Effect of High Mixing Intensity on Rheological Properties of Cemented Paste Backfill
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.1.1. Tailings
2.1.2. Cement
2.2. Mixture Contents
2.3. Preparation of Samples
2.4. Experimental Methods
2.4.1. Inductively Coupled Plasma Mass Spectrometry
2.4.2. Rheology
3. Results and Discussion
3.1. The Chemical Environment Changes of CPB
3.2. Rheological Properties
3.3. Thixotropic Breakdown
3.4. Structural Breakdown
4. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Compound | Pb | Zn | S | As | Au | Ag | CaO | MgO | Al2O3 | SiO2 |
---|---|---|---|---|---|---|---|---|---|---|
Content/% | 0.035 | 0.003 | 0.39 | 0.057 | 0.03 | 1.59 | 9.16 | 1.4 | 6.19 | 64.69 |
Items | MgO | SiO2 | Na2O | K2O | Al2O3 | SO3 | Fe2O3 | CaO |
---|---|---|---|---|---|---|---|---|
Amount (%) | 1.40 | 20.70 | 0.18 | 0.48 | 4.50 | 2.60 | 3.30 | 65.10 |
Code | Water w/c (by mass) | Cement (wt %) | Tailings t/c (by mass) | Solids Content (wt %) | Solids Content (vol. %) |
---|---|---|---|---|---|
CPB-A | 2.75 | 8.12 | 8.56 | 77.66 | 56 |
CPB-B | 2.75 | 8.64 | 7.83 | 76.25 | 54 |
CPB-C | 2.75 | 9.17 | 7.16 | 74.79 | 52 |
CPB-D | 2.25 | 11.17 | 5.70 | 74.86 | 52 |
High-Shearing-Type Mixer (rpm) | High-Intensity Mixer (rpm) | Estimated Shear Rate (s−1) |
---|---|---|
100 | 334.78 | 120.14 |
200 | 669.57 | 240.28 |
300 | 1004.35 | 360.42 |
400 | 1339.13 | 480.56 |
500 | 1673.91 | 600.70 |
600 | 2008.70 | 720.83 |
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Yang, L.; Wang, H.; Li, H.; Zhou, X. Effect of High Mixing Intensity on Rheological Properties of Cemented Paste Backfill. Minerals 2019, 9, 240. https://doi.org/10.3390/min9040240
Yang L, Wang H, Li H, Zhou X. Effect of High Mixing Intensity on Rheological Properties of Cemented Paste Backfill. Minerals. 2019; 9(4):240. https://doi.org/10.3390/min9040240
Chicago/Turabian StyleYang, Liuhua, Hongjiang Wang, Hong Li, and Xu Zhou. 2019. "Effect of High Mixing Intensity on Rheological Properties of Cemented Paste Backfill" Minerals 9, no. 4: 240. https://doi.org/10.3390/min9040240