The Role of Rheological Additives on Fresh and Hardened Properties of Cemented Paste Backfill
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Mixture and Sample Preparations
2.3. Test Methods
2.3.1. Workability Properties Tests
2.3.2. Mechanical Property Tests
2.3.3. Drying Shrinkage Test
2.3.4. Microstructural Analyses
3. Results and Discussions
3.1. Workability of Fresh CPBs
3.2. Mechanical Properties of Hardened CPBs
3.3. Drying Shrinkage
3.4. Microstructure
4. Conclusions
- (1)
- The workability of fresh CPB mixtures mainly depends on the PAM dosage and W/S of mixtures. The yield stress and viscosity of fresh CPB mixtures increased with the PAM dosages. Moreover, reducing the W/S can effectively improve the stability of CPB mixtures;
- (2)
- The strength development of CPB at low W/S is improved, and the consistency of fresh CPB mixtures is positively correlated with the free water content. Reducing the W/S ratio produces a positive effect on the mechanical properties of hardened CPB mixtures, but normally exerts a negative influence on the workability of fresh CPB mixtures;
- (3)
- The higher drying shrinkage and mass loss of CPBs with a W/S ratio of 0.5 compared to that with a W/S ratio of 0.3 are due to the higher capillary pores volume; the increasing W/C ratios of CPBs lead to lower shrinkage strain but slightly higher mass loss during drying, which is attributed to the higher capillary pores volume and the larger mean pore size;
- (4)
- Microstructural analysis reveals that the PAM declines the hydration rate and hydration products amount. With decreasing W/S of the CPBs, the narrower ITZ layers can be achieved. Micro cracks and capillary porosity are other important factors affecting the mechanical and drying shrinkage properties.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
- Ince, C. Reusing gold-mine tailings in cement mortars: Mechanical properties and socio-economic developments for the Lefke-Xeros area of Cyprus. J. Clean. Prod. 2019, 238, 117871. [Google Scholar] [CrossRef]
- Saedi, A.; Jamshidi-Zanjani, A.; Darban, A.K. A review of additives used in the cemented paste tailings: Environmental aspects and application. J. Environ. Manag. 2021, 289, 112501. [Google Scholar] [CrossRef] [PubMed]
- Deqing, G.; Hongbao, L.; Chao, C.; Hongjian, L.; Youzhi, Z. An experimental study on strength characteristics and hydration mechanism of cemented ultra-fine tailings backfill. Front. Mater. 2021, 8, 279. [Google Scholar] [CrossRef]
- Roshani, A.; Fall, M. Flow ability of cemented pastefill material that contains nano-silica particles. Powder Technol. 2020, 373, 289–300. [Google Scholar] [CrossRef]
- Ince, C.; Derogar, S.; Gurkaya, K.; Ball, R.J. Properties, durability and cost efficiency of cement and hydrated lime mortars reusing copper mine tailings of Lefke-Xeros in Cyprus. Constr. Build. Mater. 2021, 268, 121070. [Google Scholar] [CrossRef]
- Mashifana, T.; Sithole, T. Clean production of sustainable backfill material from waste gold tailings and slag. J. Clean. Prod. 2021, 308, 127357. [Google Scholar] [CrossRef]
- Lu, H.; Sun, Q. Preparation and strength formation mechanism of calcined oyster shell, red mud, slag, and iron tailing composite cemented paste backfill. Materials 2022, 15, 2199. [Google Scholar] [CrossRef]
- Zuo, S.; Yuan, Q.; Huang, T.; Zhang, M.; Wu, Q. Rheological behaviour of low-heat Portland cement paste with MgO-based expansive agent and shrinkage reducing admixture. Constr. Build. Mater. 2021, 304, 124583. [Google Scholar] [CrossRef]
- Yin, S.; Wu, A.; Hu, K.; Wang, Y.; Zhang, Y. The effect of solid components on the rheological and mechanical properties of cemented paste backfill. Miner. Eng. 2012, 35, 61–66. [Google Scholar] [CrossRef]
- Liu, Y.; Li, H.; Wang, K.; Wu, H.; Cui, B. Effects of accelerator–water reducer admixture on performance of cemented paste backfill. Constr. Build. Mater. 2020, 242, 118187. [Google Scholar] [CrossRef]
- Mehdizadeh, H.; Guo, M.-Z.; Ling, T.-C. Ultra-fine sediment of Changjiang estuary as binder replacement in self-compacting mortar: Rheological, hydration and hardened properties. J. Build. Eng. 2021, 44, 103251. [Google Scholar] [CrossRef]
- Li, L.; Wan, Y.; Chen, S.; Tian, W.; Long, W.; Song, J. Prediction of optimal ranges of mix ratio of self-compacting mortars (SCMs) based on response surface method (RSM). Constr. Build. Mater. 2022, 319, 126043. [Google Scholar] [CrossRef]
- Belibi Tana, A.E.; Yin, S.; Wang, L. Investigation on mechanical characteristics and microstructure of cemented whole tailings backfill. Minerals 2021, 11, 592. [Google Scholar] [CrossRef]
- Libre, N.A.; Khoshnazar, R.; Shekarchi, M. Relationship between fluidity and stability of self-consolidating mortar incorporating chemical and mineral admixtures. Constr. Build. Mater. 2010, 24, 1262–1271. [Google Scholar] [CrossRef]
- Sha, S.; Wang, M.; Shi, C.; Xiao, Y. Influence of the structures of polycarboxylate superplasticizer on its performance in cement-based materials-A review. Constr. Build. Mater. 2020, 233, 117257. [Google Scholar] [CrossRef]
- Yang, L.; Yilmaz, E.; Li, J.; Liu, H.; Jiang, H. Effect of superplasticizer type and dosage on fluidity and strength behavior of cemented tailings backfill with different solid contents. Constr. Build. Mater. 2018, 187, 290–298. [Google Scholar] [CrossRef]
- Chen, Q.; Tao, Y.; Zhang, Q.; Qi, C. The rheological, mechanical and heavy metal leaching properties of cemented paste backfill under the influence of anionic polyacrylamide. Chemosphere 2022, 286, 131630. [Google Scholar] [CrossRef]
- Bessaies-Bey, H.; Baumann, R.; Schmitz, M.; Radler, M.; Roussel, N. Effect of polyacrylamide on rheology of fresh cement pastes. Cem. Concr. Res. 2015, 76, 98–106. [Google Scholar] [CrossRef]
- Govin, A.; Bartholin, M.-C.; Schmidt, W.; Grosseau, P. Combination of superplasticizers with hydroxypropyl guar, effect on cement-paste properties. Constr. Build. Mater. 2019, 215, 595–604. [Google Scholar] [CrossRef]
- Silva, B.; Ferreira Pinto, A.P.; Gomes, A.; Candeias, A. Fresh and hardened state behaviour of aerial lime mortars with superplasticizer. Constr. Build. Mater. 2019, 225, 1127–1139. [Google Scholar] [CrossRef]
- Jin, J.; Qin, Z.; Lü, X.; Liu, T.; Zhang, G.; Shi, J.; Zuo, S.; Li, D. Rheology control of self-consolidating cement-tailings grout for the feasible use in coal gangue-filled backfill. Constr. Build. Mater. 2022, 316, 125836. [Google Scholar] [CrossRef]
- Ouattara, D.; Yahia, A.; Mbonimpa, M.; Belem, T. Effects of superplasticizer on rheological properties of cemented paste backfills. Int. J. Miner. Processing 2017, 161, 28–40. [Google Scholar] [CrossRef]
- Qiu, J.; Guo, Z.; Yang, L.; Jiang, H.; Zhao, Y. Effects of packing density and water film thickness on the fluidity behaviour of cemented paste backfill. Powder Technol. 2020, 359, 27–35. [Google Scholar] [CrossRef]
- Sun, Q.; Wei, X.; Wen, Z. Preparation and strength formation mechanism of surface paste disposal materials in coal mine collapse pits. J. Mater. Res. Technol. 2022, 17, 1221–1231. [Google Scholar] [CrossRef]
- Güneyisi, E.; Gesoglu, M.; Ghanim, H.; İpek, S.; Taha, I. Influence of the artificial lightweight aggregate on fresh properties and compressive strength of the self-compacting mortars. Constr. Build. Mater. 2016, 116, 151–158. [Google Scholar] [CrossRef]
- Li, C.; Wang, Q.; Chen, J.; Jia, S.; Jiang, L.; He, J. Effect of polyether-type SRA on the drying shrinkage, pore structure and properties of blended mortar incorporating limestone powder. Constr. Build. Mater. 2020, 264, 120173. [Google Scholar] [CrossRef]
- Hossain, M.M.; Karim, M.R.; Hasan, M.; Hossain, M.K.; Zain, M.F.M. Durability of mortar and concrete made up of pozzolans as a partial replacement of cement: A review. Constr. Build. Mater. 2016, 116, 128–140. [Google Scholar] [CrossRef]
- Mobili, A.; Belli, A.; Giosuè, C.; Bellezze, T.; Tittarelli, F. Metakaolin and fly ash alkali-activated mortars compared with cementitious mortars at the same strength class. Cem. Concr. Res. 2016, 88, 198–210. [Google Scholar] [CrossRef]
- Zhang, T.; Liang, X.; Li, C.; Lorin, M.; Li, Y.; Vandeperre, L.J.; Cheeseman, C.R. Control of drying shrinkage in magnesium silicate hydrate (m-s-h) gel mortars. Cem. Concr. Res. 2016, 88, 36–42. [Google Scholar] [CrossRef]
- Sri Rama Chand, M.; Swamy Naga Ratna Giri, P.; Rathish Kumar, P.; Rajesh Kumar, G.; Raveena, C. Effect of self curing chemicals in self compacting mortars. Constr. Build. Mater. 2016, 107, 356–364. [Google Scholar] [CrossRef]
- Lyu, K.; She, W.; Chang, H.; Gu, Y. Effect of fine aggregate size on the overlapping of interfacial transition zone (ITZ) in mortars. Constr. Build. Mater. 2020, 248, 118559. [Google Scholar] [CrossRef]
- Hu, H.-B.; He, Z.-H.; Shi, J.-Y.; Liang, C.-F.; Shibro, T.-G.; Liu, B.-J.; Yang, S.-Y. Mechanical properties, drying shrinkage, and nano-scale characteristics of concrete prepared with zeolite powder pre-coated recycled aggregate. J. Clean. Prod. 2021, 319, 128710. [Google Scholar] [CrossRef]
- Kong, Y.; Wang, P.; Liu, S.; Zhao, G.; Peng, Y. SEM analysis of the interfacial transition zone between cement-glass powder paste and aggregate of mortar under microwave curing. Materials 2016, 9, 733. [Google Scholar] [CrossRef] [PubMed] [Green Version]
Chemicals (wt/%) | CaO | SiO2 | Al2O3 | Fe2O3 | SO3 | MgO | Other Oxides | LOI |
---|---|---|---|---|---|---|---|---|
OPC | 62.80 | 20.60 | 4.13 | 2.99 | 2.56 | 1.93 | 3.93 | 1.06 |
TS | 7.31 | 47.56 | 7.12 | 24.65 | - | 5.42 | 7.13 | 0.81 |
Sample | Water-to-Solid Ratios | Water-to-Cement Ratios | Water (g) | OPC (g) | TS (g) | PCE (%) |
---|---|---|---|---|---|---|
S3C06P10 | 0.3 | 0.6 | 900 | 1500 | 1500 | 1.0 |
S3C08P10 | 0.8 | 900 | 1125 | 1875 | 1.0 | |
S3C10P10 | 1.0 | 900 | 900 | 2100 | 1.0 | |
S3C12P10 | 1.2 | 900 | 750 | 2250 | 1.0 | |
S4C06P5 | 0.4 | 0.6 | 900 | 1500 | 750 | 0.5 |
S4C08P5 | 0.8 | 900 | 1125 | 1125 | 0.5 | |
S4C10P5 | 1.0 | 900 | 900 | 1350 | 0.5 | |
S4C12P5 | 1.2 | 900 | 750 | 1500 | 0.5 | |
S5C06P0 | 0.5 | 0.6 | 900 | 1500 | 300 | 0 |
S5C08P0 | 0.8 | 900 | 1125 | 675 | 0 | |
S5C10P0 | 1.0 | 900 | 900 | 900 | 0 | |
S5C12P0 | 1.2 | 900 | 750 | 1050 | 0 |
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. |
© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Share and Cite
Jin, J.; Qin, Z.; Zuo, S.; Feng, J.; Sun, Q. The Role of Rheological Additives on Fresh and Hardened Properties of Cemented Paste Backfill. Materials 2022, 15, 3006. https://doi.org/10.3390/ma15093006
Jin J, Qin Z, Zuo S, Feng J, Sun Q. The Role of Rheological Additives on Fresh and Hardened Properties of Cemented Paste Backfill. Materials. 2022; 15(9):3006. https://doi.org/10.3390/ma15093006
Chicago/Turabian StyleJin, Jiaxu, Zhifa Qin, Shenghao Zuo, Jiaju Feng, and Qi Sun. 2022. "The Role of Rheological Additives on Fresh and Hardened Properties of Cemented Paste Backfill" Materials 15, no. 9: 3006. https://doi.org/10.3390/ma15093006