Advances in concrete construction

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Properties and applications of ultra-fine composite mineral admixtures prepared by fly ash

  • Yike Ye (State Power Environmental Protection Research Institute) ;
  • Wei Li (College of Materials Sci. and Eng., Nanjing Tech University) ;
  • Tianxiang Yu (Nanjing Fuding New Energy Tech. Co. Ltd.) ;
  • Kun Liu (Nanjing Fuding New Energy Tech. Co. Ltd.) ;
  • Meng Zhang (Nanjing Fuding New Energy Tech. Co. Ltd.)
  • Received : 2024.08.07
  • Accepted : 2024.12.07
  • Published : 2024.12.25
⟨ Previous Next ⟩

Abstract

In recent years, with the rapid development of China's infrastructure and green high-performance concrete, as well as to achieve carbon peaking and carbon neutrality goals, the demand for green high-performance mineral admixtures is increasing. Ultra-fine composite mineral admixtures were meticulously crafted through the synergistic ultra-fine grinding of secondary fly ash and S95 mineral powder, incorporating varying ratios and a strategic quantity of grinding activator. This study delved into the fineness, specific surface area, fluidity ratio, setting time, activity index of these admixtures, the comparison with the main commercially available ultrafine powder, along with their application potential in cement and concrete. The findings underscore the remarkable performance of the admixtures, with a specific surface area reaching 780 ㎡/kg, an activity index soaring to 118%, and a fluidity ratio exceeding 112%, all exceeding the technical benchmarks set for S95 and even approaching S105 mineral powder standards. When 20% of P·O42.5 cement was substituted with the ultra-fine composite mineral admixtures, the resulting composite cement exhibited a marginal extension in setting time, a marked enhancement in mortar fluidity, and a substantial boost in compressive strength at both 3 and 28 days. Furthermore, the admixtures demonstrated exceptional versatility in concrete applications, with a maximum addition of 170 kg/㎥, constituting 45% of the total binder content. Notably, upon replacing an equivalent amount of S95 mineral powder and reducing cement dosage by 50-140 kg/㎥, the workability of the concrete was significantly improved, accompanied by an increase in compressive strength at 3, 7, and 28 days. Given their exceptional economic performance and multifaceted benefits, the ultra-fine composite mineral admixtures hold immense potential for widespread adoption and promotion in the construction industry.

Keywords

References

  1. Agrawal, V.M. and Savoika, P.P. (2021), "Optimization of binary and ternary concrete composed of fly ash and ultra-fine slag using GRA", Adv. Concrete Constr., Int. J., 12(4), 283-294. https://doi.org/10.12989/acc.2021.12.4.283
  2. Ahmad, S., Bahraq, A.A., Al-Fakih, A., Maslehuddin, M. and Al Osta, M.A. (2024), "Durability and Mechanical Aspects of UHPC Incorporating Fly Ash and Natural Pozzolan", Arab. J. Sci. Eng., 49(4), 5255-5266. https://doi.org/10.1007/s13369-023-08416-1
  3. Ajith, G., Shanmugasundaram, N. and Praveenkumar, S. (2021), "Effect of mineral admixtures and manufactured sand on compressive strength of engineered cementitious composite", J. Build. Pathol. Rehabil., 6, 1-9. https://doi.org/10.1007/s41024-021-00137-y
  4. Akmalaiuly, K., Berdikul, N., Pundienė, I. and Pranckevičienė, J. (2023), "The effect of mechanical activation of fly ash on cement-based materials hydration and hardened state properties", Mater., 16(8), 2959. https://doi.org/10.3390/ma16082959
  5. Al-Shmaisani, S., Kalina, R.D., Ferron, R.D. and Juenger, M.C. (2022), "Assessment of blended coal source fly ashes and blended fly ashes", Constr. Build. Mater., 342, p. 127918. https://doi.org/10.1016/j.conbuildmat.2022.127918
  6. Amin, M., Tayeh, B.A. and Agwa, I.S. (2020), "Effect of using mineral admixtures and ceramic wastes as coarse aggregates on properties of ultrahigh-performance concrete", J. Cleaner Product., 273, 123073. https://doi.org/10.1016/j.jclepro.2020.123073
  7. Boopathi, V. and Sharmila Devi, K. (2019), "Durability Study on Self Compacting Concrete with mineral Admixture", J. Trend Scient. Res. Develop., 3(3), 1790-1797. https://doi.org/10.31142/ijtsrd23226
  8. Chen, X.P., Sun, Z.W.S. and Pang, J.Y. (2021), "Effects of active mineral admixture on mechanical properties and durability of concrete", Mater. Res. Express, 8(11), p. 115506. https://doi.org/10.1016/j.jobe.2021.103314
  9. China Building Materials Federation (2022), Ultrafine composite mineral admixtures: T/CB 194-2022; Beijing : China Building Materials Industry Press, 1-3.
  10. Eker, H., Demir Şahin, D. and Çullu, M. (2023), "Effect of reduced fineness of fly ash used on the Alkali–Silica Reaction (ASR) of concrete", Iran. J. Sci. Technol. Trans. Civil Eng., 47, 2203-2217. https://doi.org/10.1007/s40996-023-01090-1
  11. Ganesan, H., Sachdeva, A., Petrounias, P., Lampropoulou, P., Sharma, P.K. and Kumar, A. (2023), "Impact of fine slag aggregates on the final durability of coal bottom ash to produce sustainable concrete", Sustainability, 15(7), 6076. https://doi.org/10.3390/su15076076
  12. Krishnaraj, L. and Ravichandrn, P.T. (2021), "Characterisation of ultra-fine fly ash as sustainable cementitious material for masonry construction", Ain Shams Eng. J., 12(1), 259-269. https://doi.org/10.1016/j.asej.2020.07.008
  13. Li, Z., Xu, G. and Shi, X. (2021), "Reactivity of coal fly ash used in cementitious binder systems: A state-of-the-art overview", Fuel, 301, p. 121031. https://doi.org/10.1016/j.fuel.2021.121031
  14. Li, C., Geng, H., Zhou, S., Dai, M., Sun, B. and Li, F. (2022), "Experimental study on preparation and performance of concrete with large content of fly ash", Front. Mater., 8, 764820. https://doi.org/10.3389/fmats.2021.764820
  15. Libre, N.A., Khoshnazar, R. and Shekarchi, M. (2010), "Relationship between fluidity and stability of self consolidating mortar incorporating chemical and mineral admixtures", Constr. Build. Mater., 24(7), 1262-1271. https://doi.org/10.1016/j.conbuildmat.2009.12.009
  16. Lyngdoh, G.A., Zaki, M., Krishnan, N.A. and Das, S. (2022), "Prediction of concrete strengths enabled by missing data imputation and interpretable machine learning", Cement Concrete Compos., 128, 104414. https://doi.org/10.1016/j.cemconcomp.2022.104414
  17. Mucsi, G. (2016), "Mechanical activation of power station fly ash by grinding–A review", Epitoanyag-J. Silicate Based Compos. Mater., 68, 56-61. http://dx.doi.org/10.14382/epitoanyag-jsbcm.2016.10
  18. Sankar, L.P., Sivasankar, S., Shunmugasundaram, M. and Kumar, A.P. (2020), "Investigation on binder and concrete with fine grinded fly ash and silica fume as pozzolanic combined replacement", Mater. Today: Proceedings, 27, 1157-1162. https://doi.org/10.1016/j.matpr.2020.01.607
  19. Sharma, R., Jang, J.G. and Bansal, P.P. (2022), "A comprehensive review on effects of mineral admixtures and fibers on engineering properties of ultra-high-performance concrete", J. Build. Eng., 45, 103314. https://doi.org/10.1016/j.cemconcomp.2022.104414
  20. Sun, J. and Zhang, P. (2021), "Effects of different composite mineral admixtures on the early hydration and long-term properties of cement-based materials: A comparative study", Constr. Build. Mater., 294, 123547. https://doi.org/10.1016/j.conbuildmat.2021.123547
  21. Sun, Y., Wang, K.Q. and Lee, H.S. (2021), "Prediction of compressive strength development for blended cement mortar considering fly ash fineness and replacement ratio", Constr. Build. Mater., 271. https://doi.org/10.1016/j.conbuildmat.2020.121532
  22. Tangadagi, R.B., Manjunatha, M., Seth, D. and Preethi, S. (2021), "Role of mineral admixtures on strength and durability of high strength self compacting concrete: An experimental study", Materialia, 18, 101144. https://doi.org/10.1016/j.mtla.2021.101144
  23. Ting, L., Qiang, W. and Shiyu, Z. (2019), "Effects of ultra-fine ground granulated blast-furnace slag on initial setting time, fluidity and rheological properties of cement pastes", Powder Technol., 345, 54-63. https://doi.org/10.1016/j.powtec.2018.12.094
  24. Wang, Y., Burris, L., Hooton, R.D., Shearer, C.R. and Suraneni, P. (2022), "Effects of unconventional fly ashes on cementitious paste properties", Cement Concrete Compos., 125, p. 104291. https://doi.org/10.1016/j.cemconcomp.2021.104291
  25. Wang, T., Fan, X.Q., Gao, C.S. and Qu, C. (2024), "Performance of geopolymer paste under the different concentrations of sodium hydroxide solution", Magaz. Concrete Res., 76(24), 1384-1392. https://doi.org/10.1680/jmacr.24.00069
  26. Wi, K., Sahin, O., Wang, K. and Lee, Y. (2024), "Characterization and evaluation of cement-based systems containing solution treated municipal solid-waste incineration fly ash", Constr. Build. Mater., 416, p. 135230. https://doi.org/10.1016/j.conbuildmat.2024.135230
  27. Wu, M., Sui, S., Zhang, Y., Jia, Y., She, W., Liu, Z. and Yang, Y. (2021), "Analyzing the filler and activity effect of fly ash and slag on the early hydration of blended cement based on calorimetric test", Constr. Build. Mater., 276, 122201. https://doi.org/10.1016/j.conbuildmat.2020.122201
  28. Zhuge, X.F., Jiang, H.J., Yuan, Q.K., Ge, J. and Fan, L.D. (2024), "Preparation of ultrafine composite admixture and its application in cement industry", China Cement, (2), 55-58.