Title:
Effect of Superplasticizer on Water Availability and Rheological Properties of Cement Paste Containing Calcined Clay
Author(s):
L. Ferrari, V. Bortolotti, N. Mikanovic, M. Ben-Haha, and E. Franzoni
Publication:
Symposium Paper
Volume:
362
Issue:
Appears on pages(s):
976-985
Keywords:
differential scanning calorimetry (DSC), limestone calcined clay cement (LC3), rheology, superplasticizer, time-domain nuclear magnetic resonance (TD-NMR)
DOI:
10.14359/51742023
Date:
6/18/2024
Abstract:
Although limestone calcined clay cement (LC3) is a valid alternative to reduce the carbon footprint of cement production, some of its properties, like workability, still need to be investigated and fully understood. In this work, different cement pastes containing variable amounts of calcined clay with and without superplasticizer were analyzed. Measurements at the rheometer scale were performed to evaluate the superplasticizer’s effect on the samples’ workability. The amount of free water available after 1 hour of hydration in cement pastes was detected by Differential Scanning Calorimetry (DSC). Moreover, the Time-Domain Nuclear Magnetic Resonance (TD-NMR) was used to identify whether this water was contained either in capillary pores or in interhydrate spaces. The results obtained by DSC and TD-NMR revealed that pastes containing superplasticizers show a slightly higher amount of available free water, with a direct positive consequence on rheological properties. However, the amount of calcined clay (CC) in cement impacts both aspects: superplasticizer dosage to reach the target fluidity of pastes and workability retention over 60 minutes. Moreover, the confirmation of the exponential correlation between yield stress and the solid content of cementitious particles is possible when considering the detected capillary water as an indicator of the normalized concentration of solid particles.
Related References:
1. I.-I. E. A. WBCSD, “Technology Roadmap - Low-Carbon Transition in the Cement Industry,” 2009. Online.. Available: www.wbcsdcement.org.
2. F. Avet and K. Scrivener, “Investigation of the calcined kaolinite content on the hydration of Limestone Calcined Clay Cement (LC3),” Cem Concr Res, vol. 107, pp. 124–135, May 2018, doi: 10.1016/J.CEMCONRES.2018.02.016
3. K. L. Scrivener, V. M. John, and E. M. Gartner, “Eco-efficient cements: Potential economically viable solutions for a low-CO2 cement-based materials industry,” Cem Concr Res, vol. 114, pp. 2–26, Dec. 2018, doi: 10.1016/J.CEMCONRES.2018.03.015
4. L. Gebbard, B. Feneuil, M. Palacios, and N. Roussel, “Rheology of limestone calcined clays cement pastes. A comparative approach with pure portland cement pastes,” RILEM Bookseries, vol. 10, 2015, doi: 10.1007/978-94-017-9939-3_85
5. R. J. Flatt, N. Roussel, H. Bessaies-Bey, L. Caneda-Martínez, M. Palacios, and F. Zunino, “From physics to chemistry of fresh blended cements,” Cem Concr Res, vol. 172, Oct. 2023, doi: 10.1016/j.cemconres.2023.107243
6. R. Li, L. Lei, and J. Plank, “Influence of PCE superplasticizers on the fresh properties of low carbon cements containing calcined clays: A comparative study of calcined clays from three different sources,” Cem Concr Compos, vol. 139, p. 105072, May 2023, doi: 10.1016/j.cemconcomp.2023.105072
7. R. Li, L. Lei, T. Sui, and J. Plank, “Effectiveness of PCE superplasticizers in calcined clay blended cements,” Cem Concr Res, vol. 141, Mar. 2021, doi: 10.1016/j.cemconres.2020.106334
8. L. Ferrari, V. Bortolotti, N. Mikanovic, M. Ben-Haha, and E. Franzoni, “Influence of Calcined Clay on Workability of Mortars with Low-carbon Cement,” Journal, NanoWorld, vol. 9, no. S2, pp. S30–S34, Sep. 2023, doi: 10.17756/nwj.2023-s2-006
9. A. Damasceni, L. Dei, E. Fratini, F. Ridi, S. H. Chen, and P. Baglioni, “A novel approach based on differential scanning calorimetry applied to the study of tricalcium silicate hydration kinetics,” Journal of Physical Chemistry B, vol. 106, no. 44, pp. 11572–11578, Nov. 2002, doi: 10.1021/jp020211l
10. F. Ridi, E. Fratini, and P. Baglioni, “Fractal structure evolution during cement hydration by differential scanning calorimetry: Effect of organic additives,” Journal of Physical Chemistry C, vol. 117, no. 48, pp. 25478–25487, Dec. 2013, doi: 10.1021/jp406268p
11. F. Ridi, E. Fratini, P. Luciani, F. Winnefeld, and P. Baglioni, “Tricalcium silicate hydration reaction in the presence of comb-shaped superplasticizers: Boundary nucleation and growth model applied to polymermodified pastes,” Journal of Physical Chemistry C, vol. 116, no. 20, pp. 10887–10895, May 2012, doi: 10.1021/jp209156n
12. A. C. A. Muller and K. L. Scrivener, “A reassessment of mercury intrusion porosimetry by comparison with 1H NMR relaxometry,” Cem Concr Res, vol. 100, pp. 350–360, Oct. 2017, doi: 10.1016/j.cemconres.2017.05.024
13. A. C. A. Muller, K. L. Scrivener, A. M. Gajewicz, and P. J. McDonald, “Densification of C-S-H measured by 1H NMR relaxometry,” Journal of Physical Chemistry C, vol. 117, no. 1, pp. 403–412, Jan. 2013, doi: 10.1021/jp3102964
14. A. C. A. Muller, K. L. Scrivener, A. M. Gajewicz, and P. J. McDonald, “Use of bench-top NMR to measure the density, composition and desorption isotherm of C-S-H in cement paste,” Microporous and Mesoporous Materials, vol. 178, pp. 99–103, Sep. 2013, doi: 10.1016/j.micromeso.2013.01.032
15. A. Nagmutdinova, L. Brizi, P. Fantazzini, and V. Bortolotti, “Investigation of the First Sorption Cycle of White Portland Cement by 1H NMR,” Appl Magn Reson, vol. 52, no. 12, pp. 1767–1785, Dec. 2021, doi: 10.1007/s00723-021-01436-w
16. Y. Briki, F. Avet, M. Zajac, P. Bowen, M. Ben Haha, and K. Scrivener, “Understanding of the factors slowing down metakaolin reaction in limestone calcined clay cement (LC3) at late ages,” Cem Concr Res, vol. 146, Aug. 2021, doi: 10.1016/j.cemconres.2021.106477
17. L. Ferrari, V. Bortolotti, N. Mikanovic, M. Ben-Haha, and E. Franzoni, “Influence of low carbon cement and recycled aggregates on mortar fresh state and early hydration,” in Proceedings of the 16th International Congress on the Chemistry of Cement, 2023.
18. L. Ferrari and P. Boustingorry, “The influence of paste thixotropy on the formwork-filling properties of concrete,” in American Concrete Institute, ACI Special Publication, 2015.
19. K. Scrivener, R. Snellings, and B. Lothenbach, A practical guide to microstructural analysis of cementitious materials.
20. G. C. Borgia, R. J. S. Brown, and P. Fantazzini, “Uniform-Penalty Inversion of Multiexponential Decay Data II. Data Spacing, T₂ Data, Systematic Data Errors, and Diagnostics,” 2000. doi: doi: 10.1006/jmre.2000.2197
21. F. James, “MINUIT Tutorial Function Minimization,” Proceedings of the 1972 CERN Computing and Data Processing School, Pertisau, Austria, (CERN 72-21), Sep. 1972.
22. A. M. Gajewicz, E. Gartner, K. Kang, P. J. McDonald, and V. Yermakou, “A 1H NMR relaxometry investigation of gel-pore drying shrinkage in cement pastes,” Cem Concr Res, vol. 86, pp. 12–19, Aug. 2016, doi: 10.1016/j.cemconres.2016.04.013
23. R. J. Flatt and P. Bowen, “Yodel: A yield stress model for suspensions,” Journal of the American Ceramic Society, vol. 89, no. 4, pp. 1244–1256, Apr. 2006, doi: 10.1111/j.1551-2916.2005.00888.x
24. C. F. Ferraris and F. de Larrard, “Modified slump test to measure rheological parameters of fresh concrete,” Cement, Concrete, and Aggregates, vol. 20, no. 2, pp. 241–247, Dec. 1998.