Effect of Rice Straw on Tensile Properties of Tailings Cemented Paste Backfill
Source abstract
Abstract
It is important and difficult to improve the tensile strength of backfill material to ensure the stability of goafs. In this study, rice straw (RS) in fiber form is used to improve the tensile properties of cemented paste backfill (CPB). An orthogonal experiment was designed, Brazilian indirect tensile strength tests were conducted to test the tensile performance of RS fiber-reinforced cemented paste backfill (RSCPB) under different fiber content (1, 2, 3 kg/m3) and fiber length (0.8~1, 1~3, 3~5 cm), and the microstructure of RSCPB was analyzed with scanning electron microscopy (SEM). The results showed that, compared with the conventional cemented paste backfill (CCPB), the increase in tensile strength of RSCPB ranged from 115.38% to 300.00% at 3 days curing age, 40.91% to 346.15% at 7 days, and −38.10% to 28.00% at 28 days, and the strain was slightly reduced during the curing period. The tensile strength, strain, and percentage increase of the RSCPB compared to the CCBP did not show a monotonic pattern of variation with the RS fiber content and length during the curing period. The RSCPB samples fractured under peak stress, showing obvious brittle failure. In addition, sulfate generated from S2− in the tailings inhibits the hydration reaction, and generates swelling products that form weak structural surfaces, which, in turn, lead to a 28-day tensile strength and strain of RSCPB lower than those at 7 days.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Tailings Management and Properties · Landfill Environmental Impact Studies · Rock Mechanics and Modeling
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Funding
National Natural Science Foundation Project of China · Hunan Provincial Natural Science Foundation Project
References (42)
Show source-provided references
1. Experimental investigation on the strength characteristics of cement paste backfill in a similar stope model and its mechanism10.1016/j.conbuildmat.2017.07.142 ↗
2. Chen, X., Shi, X., Zhou, J., Chen, Q., and Yang, C. (2017). Feasibility of Recycling Ultrafine Leaching Residue by Backfill: Experimental and CFD Approaches. Minerals, 7.10.3390/min7040054 ↗
3. A practice of ultra-fine tailings disposal as filling material in a gold mine10.1016/j.jenvman.2017.02.056 ↗
4. Effect of overflow tailings properties on cemented paste backfill10.1016/j.jenvman.2019.01.040 ↗
5. Li, H., Gao, P., Xu, F., Sun, T., Zhou, Y., Zhu, J., Peng, C., and Lin, J. (2021). Effect of Fine Aggregate Particle Characteristics on Mechanical Properties of Fly Ash-Based Geopolymer Mortar. Minerals, 11.10.3390/min11080897 ↗
6. Experimental investigation of sound transmission loss in concrete containing recycled rubber crumbs
7. Nano silica and metakaolin effects on the behavior of concrete containing rubber crumbs10.3390/civileng1030017 ↗
8. Developing a hybrid model of salp swarm algorithm-based support vector machine to predict the strength of fiber-reinforced cemented paste backfill10.1007/s00366-020-01014-x ↗
9. Zhu, C., Zhou, N., Guo, Y., Li, M., and Cheng, Q. (2021). Effect of Doped Glass Fibers on Tensile and Shear Strengths and Microstructure of the Modified Shotcrete Material: An Experimental Study and a Simplified 2D Model. Minerals, 11.10.3390/min11101053 ↗
10. Compressive behavior and microstructural properties of tailings polypropylene fibre-reinforced cemented paste backfill10.1016/j.conbuildmat.2018.09.092 ↗
11. Influence of Polypropylene Fiber Reinforcement on Tensile Behavior and Failure Mode of Tailings Cemented Paste Backfill10.1109/ACCESS.2019.2919480 ↗
12. Influence of fibre reinforcement on the post-cracking behaviour of a cement-stabilised sandy-clay subjected to indirect tensile stress10.1016/j.conbuildmat.2017.02.010 ↗
13. Influence of different treatment and amount of Spanish broom and hemp fibres on the mechanical properties of reinforced cement mortars10.1016/j.conbuildmat.2020.121702 ↗
14. Experimental study on the mechanical properties and microstructure of chopped basalt fibre reinforced concrete10.1016/j.matdes.2014.01.056 ↗
15. Effect of pine needle fibre reinforcement on the mechanical properties of concrete10.1016/j.conbuildmat.2021.122333 ↗
16. Investigation of steel fiber effects on concrete abrasion resistance
17. Impact resistance of fiber-reinforced concrete—A review10.1016/j.cemconcomp.2019.103389 ↗
18. Artificial intelligence model for studying unconfined compressive performance of fiber-reinforced cemented paste backfill10.1016/S1003-6326(21)65563-2 ↗
19. Efficacy of modified rice straw fibre on properties of cementitious composites10.1016/j.jclepro.2020.124184 ↗
20. Prospect of using rice straw for power generation: A review10.1007/s11356-020-09102-7 ↗
21. State of the art of straw treatment technology: Challenges and solutions forward10.1016/j.biortech.2020.123656 ↗
22. Van Hung, N., Maguyon-Detras, M.C., Migo, M.V., Quilloy, R., Balingbing, C., Chivenge, P., and Gummert, M. (2020). Rice Straw Overview: Availability, Properties, and Management Practices. Sustainable Rice Straw Management, Springer.10.1007/978-3-030-32373-8_1 ↗
23. Study of cement composites on addition of rice husk
24. Characterisation of sustainable building walls made from rice straw bales10.1016/j.jobe.2019.101041 ↗
25. The effects of using agricultural waste as partial substitute for sand in cement blocks10.1016/j.jobe.2018.04.023 ↗
26. Determination of mechanical, flowability, and microstructural properties of cemented tailings backfill containing rice straw10.1016/j.conbuildmat.2020.118520 ↗
27. Ashour, T., Morsy, M., Korjenic, A., Fischer, H., Khalil, M., Sesto, E., Orabi, M., and Yehia, I. (2021). Engineering Parameters of Rice Straw Concrete with Granulated Blast Furnace Slag. Energies, 14.10.3390/en14020343 ↗
28. Mechanical properties of cemented tailings backfill containing alkalized rice straw of various lengths10.1016/j.jenvman.2020.111124 ↗
29. Chen, Q., Zhang, Q., Xiao, C., and Chen, X. (2017). Backfilling behavior of a mixed aggregate based on construction waste and ultrafine tailings. PLoS ONE, 12.10.1371/journal.pone.0179872 ↗
30. Wu, J., Feng, M., Chen, Z., Mao, X., Han, G., and Wang, Y. (2018). Particle Size Distribution Effects on the Strength Characteristic of Cemented Paste Backfill. Minerals, 8.10.3390/min8080322 ↗
31. High strain rate compressive strength behavior of cemented paste backfill using split Hopkinson pressure bar10.1016/j.ijmst.2021.03.008 ↗
32. Mechanical properties of soil reinforced with both lime and four kinds of fiber10.1016/j.conbuildmat.2018.03.248 ↗
33. Influence of pretreatment of rice straw on hydration of straw fiber filled cement based composites10.1016/j.conbuildmat.2016.03.088 ↗
34. Temperature and humidity effects on behavior of grouts
35. Farzampour, A. (2019). Compressive behavior of concrete under environmental effects. Compressive Strength of Concrete, IntechOpen.10.5772/intechopen.85675 ↗
36. Determining Tensile Strength of Rock by the Direct Tensile, Brazilian Splitting, and Three-Point Bending Methods: A Comparative Study10.1155/2021/5519230 ↗
37. American Society for Testing and Materials (2016). Standard Test Method for Splitting Tensile Strength of Intact Rock Core Specimens, ASTM International.
38. Effect of hydration on failure surface evolution of low sulfide content cemented paste backfill10.1016/j.ijrmms.2021.104749 ↗
39. Effect of desliming of sulphide-rich mill tailings on the long-term strength of cemented paste backfill10.1016/j.jenvman.2012.11.014 ↗
40. Coupling binder hydration, temperature and compressive strength development of underground cemented paste backfill at early ages10.1016/j.tust.2009.07.008 ↗
41. The Performance and Mechanism Analysis of Cement Pastes Added to Aluminum Sulfate-Based Low-Alkali Setting Accelerator10.1155/2017/8906708 ↗
42. Chen, X., Shi, X., Zhang, S., Chen, H., Zhou, J., Yu, Z., and Huang, P. (2020). Fiber-Reinforced Cemented Paste Backfill: The Effect of Fiber on Strength Properties and Estimation of Strength Using Nonlinear Models. Materials, 13.10.3390/ma13030718 ↗