Title:
Investigations of Ettringite Morphology with the Use of Different Retarders in CSA/OPC Blends
Author(s):
Tristana Duvallet, Robert Rathbone, Robert Jewell, Christopher Moore
Publication:
Symposium Paper
Volume:
362
Issue:
Appears on pages(s):
828-840
Keywords:
calcium sulfoaluminate cement, compressive strength, ettringite, morphology, portland cement, scanning electron microscopy
DOI:
10.14359/51742012
Date:
6/17/2024
Abstract:
Normal Portland cement (PC) and calcium sulfoaluminate (CSA) cements are two distinct types of cement binders exhibiting different hydration processes and mechanical properties. Blends of these two binders can produce a more suitable material for specific construction purposes. However, the effects of retarders in blended PC-CSA systems are not well understood, despite the well-established properties of retarders in pure PC and CSA cement binders. Therefore, this study aims to investigate the influence of various retarders (citric acid, borax, tartaric acid, and blends of citric acid and borax/tartaric acid) in an 85 wt.% CSA and 15 wt.% PC blend through the use of different techniques, such as calorimetry, ultrasonic testing, thermogravimetry analyses, scanning electron microscopy with electron dispersive x-ray spectroscopy, Fourier transform infrared spectroscopy and mechanical testing. The morphology of ettringite, a mineral formed during the hydration process of CSA cement, is studied and found to vary significantly depending on the retarders used. In addition, these different types of ettringites significantly affect the mechanical properties of the cement. This research provides insight into the impact of retarders on the properties of blended PC-CSA systems and could aid in designing more durable and sustainable concrete structures. The findings of this study could also contribute to the development of new and improved cement-based products by enhancing our fundamental understanding of the setting and hardening of cementitious materials.
Related References:
1. Alzaza, A.; Ohenoja, K.; Isteri, V.; Hanein, T.; Geddes, D.; Poikelispää, M.; Illikainen, M. Blending eco-efficient calcium sulfoaluminate belite ferrite cement to enhance the physico–mechanical properties of Portland cement paste cured in refrigerated and natural winter conditions. Cement and Concrete Composites 2022, 129. doi: 10.1016/j.cemconcomp.2022.104469
2. Telesca, A.; Marroccoli, M.; Coppola, L.; Coffetti, D.; Candamano, S. Tartaric acid effects on hydration development and physico-mechanical properties of blended calcium sulphoaluminate cements. Cement and Concrete Composites 2021, 124. doi: 10.1016/j.cemconcomp.2021.104275
3. Park, S.; Jeong, Y.; Moon, J.; Lee, N. Hydration characteristics of calcium sulfoaluminate (CSA) cement/portland cement blended pastes. Journal of Building Engineering 2021, 34. doi: 10.1016/j.jobe.2020.101880
4. Ramachandran, V. S.; Lowery, M. S. Conduction calorimetric investigation of the effect of retarders on the hydration of Portland cement. Thermochimica Acta 1992, 195, 373-387. doi: 10.1016/0040-6031(92)80081-7
5. Cheung, J.; Jeknavorian, A.; Roberts, L.; Silva, D. Impact of admixtures on the hydration kinetics of Portland cement. Cement and Concrete Research 2011, 41 (12), 1289-1309. doi: 10.1016/j.cemconres.2011.03.005
6. Govin, A.; Quintero, G.; Belhadi, R.; Grosseau, P. Effect of different retarders and their combination with superplasticizer on the properties of CSA. In 13th International Conference on Superplasticizers and Other Chemical Admixtures in Concrete (SOCAC 2022), Milan, Italy, 2022; pp 143-156.
7. Hu, Y.; Li, W.; Ma, S.; Shen, X. Influence of borax and citric acid on the hydration of calcium sulfoaluminate cement. Chemical Papers 2017, 71 (10), 1909-1919. doi: 10.1007/s11696-017-0185-9
8. Acarturk, C.; Burris, L. Effects of combination of retarders on CSA cement systems. In International Conference on “Cement – Based Materials Tailored for a Sustainable Future”, Istanbul, Turkey; 2020.
9. Huang, G.; Zhao, J.; Gupta, R.; Liu, W. V. Influence of tartaric acid dosage on the early-age and long-term properties of calcium sulfoaluminate belite cement composites. Construction and Building Materials 2022, 356. doi: 10.1016/j.conbuildmat.2022.129257
10. ZKG. Ultrasonic measurement system revolutionizes -cement and gypsum R & D. 2022. https://www.zkg.de/en/artikel/zkg_Ultrasonic_measurement_system_revolutionizes_cement_and_gypsum_R_D_2391226.html (accessed 2023 June).
11. ASTM International. ASTM C109/C109M-21 - Standard Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50 mm] Cube Specimens); 2021. doi: 10.1520/c0109_c0109m-21
12. Bullerjahn, F.; Zajac, M.; Skocek, J.; Ben Haha, M. The role of boron during the early hydration of belite ye’elimite ferrite cements. Construction and Building Materials 2019, 215, 252-263. doi: 10.1016/j.conbuildmat.2019.04.176
13. Zajac, M.; Skocek, J.; Bullerjahn, F.; Ben Haha, M. Effect of retarders on the early hydration of calcium-sulphoaluminate (CSA) type cements. Cement and Concrete Research 2016, 84, 62-75. doi: 10.1016/j.cemconres.2016.02.014
14. Nguyen, H.; Kunther, W.; Gijbels, K.; Samyn, P.; Carvelli, V.; Illikainen, M.; Kinnunen, P. On the retardation mechanisms of citric acid in ettringite-based binders. Cement and Concrete Research 2021, 140. doi: 10.1016/j.cemconres.2020.106315
15. Makida, K.; Mizukoshi, N.; Kunimitsu, K.; Komatsu, R.; Tsukamoto, K. Morphological Change of Ettringite Crystals Grown in an Aqueous Solution by Addition of Chemical Admixtures. Transactions of the Materials Research Society of Japan 2008, 33 (4), 919-922.
16. Barnett, S. J.; Macphee, D. E.; Crammond, N. J. Extent of immiscibility in the ettringite–thaumasite system. Cement and Concrete Composites 2003, 25 (8), 851-855. doi: 10.1016/s0958-9465(03)00116-1
17. Garcia-Lodeiro, I.; Carmona-Quiroga, P. M.; Zarzuela, R.; Mosquera, M. J.; Blanco-Varela, M. T. Chemistry of the interaction between an alkoxysilane-based impregnation treatment and cementitious phases. Cement and Concrete Research 2021, 142. doi: 10.1016/j.cemconres.2020.106351
18. Pajares, I.; Martı́nez-Ramı́rez, S.; Blanco-Varela, M. T. Evolution of ettringite in presence of carbonate, and silicate ions. Cement and Concrete Composites 2003, 25 (8), 861-865. doi: 10.1016/s0958-9465(03)00113-6
19. Chukanov, N. V. Infrared spectra of mineral species; 2014. doi: 10.1007/978-94-007-7128-4
20. Horgnies, M.; Chen, J. J.; Bouillon, C. Overview about the use of Fourier Transform Infrared spectroscopy to study cementitious materials. In Materials Characterisation VI, 2013.
21. Macphee, D. E.; Barnett, S. J. Solution properties of solids in the ettringite—thaumasite solid solution series. Cement and Concrete Research 2004, 34 (9), 1591-1598. doi: 10.1016/j.cemconres.2004.02.022
22. Ambroise, J.; Georgin, J. F.; Peysson, S.; Péra, J. Influence of polyether polyol on the hydration and engineering
properties of calcium sulfoaluminate cement. Cement and Concrete Composites 2009, 31 (7), 474-482. doi: 10.1016/j.cemconcomp.2009.04.009