Title:
The Effect of Alkanolamine Admixtures in the Hydration of Limestone Calcined Clay Cements (LC3)
Author(s):
Franco Zunino, Karen L. Scrivener
Publication:
Symposium Paper
Volume:
354
Issue:
Appears on pages(s):
219-224
Keywords:
grinding aids; TEA; TIPA; DEIPA; carboaluminates; ferrite; sustainability
DOI:
10.14359/51736075
Date:
7/1/2022
Abstract:
The optimization of the production process and mixture design using blended cements is an important step to achieving widespread adoption of these new technologies. In particular, grinding is an important step to ensure good reactivity at early ages and adequate flowability. Grinding aids are normally used to reduce the electrostatic forces between particles and increase the yield of the process. Alkanolamines is a family of molecules that are commonly used for this purpose. In this study, the effect of alkanolamines on LC3 hydration was studied. It was observed that alkanolamines influence the hydration of the aluminate phases in clinker, particularly ferrite. This leads to enhanced precipitation of carboaluminates. An increase in early age strength was seen for LC3 systems incorporating TIPA (triisopropanolamine).
Related References:
1. K.L. Scrivener, V. John, E.M. Gartner, Eco-efficient cements: potential, economically viable solutions for a low-CO2, cement-based materials industry, in: United Nations Environmental Programme (UNEP), 2016.
2. B. Lothenbach, K. Scrivener, R.D. Hooton, Supplementary cementitious materials, Cement and Concrete Research. 41 (2011) 1244–1256. doi: 10.1016/j.cemconres.2010.12.001
3. M. Schneider, M. Romer, M. Tschudin, H. Bolio, Sustainable cement production—present and future, Cement and Concrete Research. 41 (2011) 642–650. doi: 10.1016/j.cemconres.2011.03.019.
4. K.L. Scrivener, F. Avet, H. Maraghechi, F. Zunino, J. Ston, A. Favier, W. Hanpongpun, Impacting factors and properties of Limestone Calcined Clay Cements (LC3), Green Materials. (2018). doi: 10.1680/jgrma.18.00029
5. F. Zunino, Limestone calcined clay cements (LC3): raw material processing, sulfate balance and hydration kinetics, EPFL Thesis 8173, 2020.
6. R. Fernandez, F. Martirena, K.L. Scrivener, The origin of the pozzolanic activity of calcined clay minerals: A comparison between kaolinite, illite and montmorillonite, Cement and Concrete Research. 41 (2011) 113–122. doi: 10.1016/j.cemconres.2010.09.013
7. A. Alujas, R. Fernández, R. Quintana, K.L. Scrivener, F. Martirena, Pozzolanic reactivity of low grade kaolinitic clays: Influence of calcination temperature and impact of calcination products on OPC hydration, Applied Clay Science. 108 (2015) 94–101. doi: 10.1016/j.clay.2015.01.028
8. F. Zunino, K. Scrivener, Increasing the kaolinite content of raw clays using particle classification techniques for
use as supplementary cementitious materials, Construction and Building Materials. 244 (2020). doi: 10.1016/j.conbuildmat.2020.118335
9. M. Cyr, P. Lawrence, E. Ringot, Efficiency of mineral admixtures in mortars: Quantification of the physical and chemical effects of fine admixtures in relation with compressive strength, Cement and Concrete Research. 36 (2006) 264–277. doi: 10.1016/j.cemconres.2005.07.001
10. P. Lawrence, M. Cyr, E. Ringot, Mineral admixtures in mortars effect of type, amount and fineness of fine constituents on compressive strength, Cement and Concrete Research. 35 (2005) 1092–1105. doi: 10.1016/j.cemconres.2004.07.004
11. F. Zunino, M. Lopez, A methodology for assessing the chemical and physical potential of industrially sourced rice husk ash on strength development and early-age hydration of cement paste, Construction and Building Materials. 149 (2017) 869–881.
12. K. De Weerdt, Separate grinding versus intergrinding, SINTEF Report, 2007.
13. A. Pérez, A. Favier, K. Scrivener, F. Martirena, Influence Grinding Procedure, Limestone Content and PSD of Components on Properties of Clinker-Calcined Clay-Limestone Cements Produced by Intergrinding, in: Calcined Clays for Sustainable Concrete, Springer, 2018: pp. 358–365.
14. J.J. Assaad, C.A. Issa, Effect of clinker grinding aids on flow of cement-based materials, Cement and Concrete Research. 63 (2014) 1–11. doi: 10.1016/j.cemconres.2014.04.006
15. F. Zunino, K. Scrivener, Assessing the effect of alkanolamine grinding aids in limestone calcined clay cements hydration, Construction and Building Materials. (2020) 121293. doi: 10.1016/j.conbuildmat.2020.121293
16. F. Zunino, K. Scrivener, The influence of the filler effect on the sulfate requirement of blended cements, Cement and Concrete Research. 126 (2019) 105918. doi: 10.1016/j.cemconres.2019.105918
17. F. Zunino, K. Scrivener, The reaction between metakaolin and limestone and its effect in porosity refinement and mechanical properties, Cement and Concrete Research. 140 (2021). doi: 10.1016/j.cemconres.2020.106307