Correlation between Slag Reactivity and Cement Paste Properties: The Influence of Slag Chemistry
Publication: Journal of Materials in Civil Engineering
Volume 36, Issue 3
Abstract
The properties of slag-rich cement paste are fundamentally associated with slag chemistry. In the present research, 10 slags covering the common chemistry range, including eight synthetic slags of system and two commercial slags, were adopted to evaluate the influence of slag composition on the early (7 days) and later (3 months) age properties of blended paste. Mixture containing slag performed better at 7 days as it favored the formation of ettringite and/or monosulfate. The MgO-rich slag cement paste exhibited good properties at both early and later ages, and it effectively promoted the precipitation of Mg-Al hydrotalcite-like phase. It was also noted that the atomic ratio of hydrotalcite-like phase was positively related to the atomic ratio of slag itself. Conversely, with the increasing MgO content in slag, the Al/Si atomic ratio of C─ S(A)─ H gel phase decreased. High and/or MgO contents can compensate the negative effect of reduced ratio at early age while not at later age. Overall, attention should be paid to aluminum- and sulfur-rich slags. These two elements in slag promoted the formation of ettringite and/or monosulfate at an early age; however, this positive effect disappeared at later ages.
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Data Availability Statement
Some or all data that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
Authors thank Arjan Thijssen (Microlab, TU Delft) for his technical support. Jeanette van den Bos (BAM Infraconsult B.V.) and René Albers (Ecocem Benelux B.V.) are gratefully acknowledged for the technical discussions and providing commercial slags.
References
Alonso, M. M., C. Gascó, M. M. Morales, J. A. Suárez-Navarro, M. Zamorano, and F. Puertas. 2019. “Olive biomass ash as an alternative activator in geopolymer formation: A study of strength, radiology and leaching behavior.” Cem. Concr. Compos. 104 (Nov): 103384. https://doi.org/10.1016/j.cemconcomp.2019.103384.
Blotevogel, S., A. Ehrenberg, L. Steger, L. Doussang, J. Kaknics, C. Patapy, and M. Cyr. 2020. “Ability of the R3 test to evaluate differences in early age reactivity of 16 industrial ground granulated blast furnace slags (GGBS).” Cem. Concr. Res. 130 (Apr): 105998. https://doi.org/10.1016/j.cemconres.2020.105998.
Bougara, A., C. Lynsdale, and N. B. Milestone. 2010. “Reactivity and performance of blastfurnace slags of differing origin.” Cem. Concr. Compos. 32 (4): 319–324. https://doi.org/10.1016/j.cemconcomp.2009.12.002.
Burciaga-Díaz, O. 2019. “Parameters affecting the properties and microstructure of quicklime (CaO)-activated slag cement pastes.” Cem. Concr. Compos. 103 (Oct): 104–111. https://doi.org/10.1016/j.cemconcomp.2019.05.002.
CEN (European Committee for Standardization). 2006. Ground granulated blast furnace slag for use in concrete, mortar and grout—Part 1: Definitions, specifications and conformity criteria. EN 15167-1:2006. Brussels, Belgium: CEN.
CEN (European Committee for Standardization). 2016. Methods of testing cement—Part 1: Determination of strength. EN-196-1:2016. Brussels, Belgium: CEN.
Chen, W., and H. Brouwers. 2007. “The hydration of slag. Part 2: Reaction models for blended cement.” J. Mater. Sci. 42 (2): 444–464. https://doi.org/10.1007/s10853-006-0874-1.
Dai, X. D., S. Aydin, M. Y. Yardimci, R. E. N. Qiang, K. Lesage, and G. D. Schutter. 2021. “Rheology, early-age hydration and microstructure of alkali-activated GGBFS-fly ash-limestone mixtures.” Cem. Concr. Compos. 124 (Nov): 104244. https://doi.org/10.1016/j.cemconcomp.2021.104244.
Deschner, F., F. Winnefeld, B. Lothenbach, S. Seufert, P. Schwesig, S. Dittrich, F. Goetz-Neunhoeffer, and J. Neubauer. 2012. “Hydration of portland cement with high replacement by siliceous fly ash.” Cem. Concr. Res. 42 (10): 1389–1400. https://doi.org/10.1016/j.cemconres.2012.06.009.
Escalante-Garcia, J. I., and J. Sharp. 2004. “The chemical composition and microstructure of hydration products in blended cements.” Cem. Concr. Compos. 26 (8): 967–976. https://doi.org/10.1016/j.cemconcomp.2004.02.036.
Juenger, M. C., R. Snellings, and S. A. Bernal. 2019. “Supplementary cementitious materials: New sources, characterization, and performance insights.” Cem. Concr. Res. 122 (Aug): 257–273. https://doi.org/10.1016/j.cemconres.2019.05.008.
Kiiashko, A., M. Chaouche, and L. Frouin. 2021. “Effect of phosphonate addition on sodium carbonate activated slag properties.” Cem. Concr. Compos. 119 (May): 103986. https://doi.org/10.1016/j.cemconcomp.2021.103986.
Kocaba, V., E. Gallucci, and K. L. Scrivener. 2012. “Methods for determination of degree of reaction of slag in blended cement pastes.” Cem. Concr. Res. 42 (3): 511–525. https://doi.org/10.1016/j.cemconres.2011.11.010.
Kucharczyk, S., M. Zajac, C. Stabler, and R. M. Thomsen. 2019. “Structure and reactivity of synthetic CaO-Al2O3-SiO2 glasses.” Accessed June 1, 2019. https://www.sciencedirect.com/author/55663279100/mohsen-ben-haha.
Li, Y., Y. Liu, X. Z. Gong, Z. R. Nie, S. P. Cui, Z. H. Wang, and W. J. Chen. 2016. “Environmental impact analysis of blast furnace slag applied to ordinary portland cement production.” J. Cleaner Prod. 120 (May): 221–230. https://doi.org/10.1016/j.jclepro.2015.12.071.
Luke, K., and F. P. Glasser. 1987. “Selective dissolution of hydrated blast furnace slag cements.” Cem. Concr. Res. 17 (2): 273–282. https://doi.org/10.1016/0008-8846(87)90110-4.
Mills, K. C., L. Yuan, Z. Li, G. H. Zhang, and K. C. Chou. 2012. “A review of the factors affecting the thermophysical properties of silicate slags.” High Temp. Mater. Processes 31 (4–5): 301–321. https://doi.org/10.1515/htmp-2012-0097.
Özbay, E., M. Erdemir, and H. İ. Durmuş. 2016. “Utilization and efficiency of ground granulated blast furnace slag on concrete properties—A review.” Constr. Build. Mater. 105 (Feb): 423–434. https://doi.org/10.1016/j.conbuildmat.2015.12.153.
Richardson, I. G. 2004. “Tobermorite/jennite-and tobermorite/calcium hydroxide-based models for the structure of CSH: Applicability to hardened pastes of tricalcium silicate, -dicalcium silicate, portland cement, and blends of portland cement with blast-furnace slag, metakaolin, or silica fume.” Cem. Concr. Res. 34 (9): 1733–1777. https://doi.org/10.1016/j.cemconres.2004.05.034.
Sakr, M., and M. Bassuoni. 2021. “Performance of concrete under accelerated physical salt attack and carbonation.” Cem. Concr. Res. 141 (Mar): 106324. https://doi.org/10.1016/j.cemconres.2020.106324.
Samarakoon, M. H., P. G. Ranjith, W. H. Duan, and V. R. S. De Silva. 2020. “Properties of one-part fly ash/slag-based binders activated by thermally-treated waste glass/NaOH blends: A comparative study.” Cem. Concr. Compos. 112 (Sep): 103679. https://doi.org/10.1016/j.cemconcomp.2020.103679.
Schöler, A., F. Winnefeld, M. B. Haha, and B. Lothenbach. 2017. “The effect of glass composition on the reactivity of synthetic glasses.” J. Am. Ceram. Soc. 100 (6): 2553–2567. https://doi.org/10.1111/jace.14759.
Scrivener, K. L. 2004. “Backscattered electron imaging of cementitious microstructures: Understanding and quantification.” Cem. Concr. Compos. 26 (8): 935–945. https://doi.org/10.1016/j.cemconcomp.2004.02.029.
Snellings, R., X. R. Li, F. Avet, and K. Scrivener. 2019. “Rapid, robust, and relevant (R3) reactivity test for supplementary cementitious materials.” ACI Mater. J. 116 (4): 155–162. https://doi.org/10.14359/51716719.
Sohn, I., and D. J. Min. 2012. “A review of the relationship between viscosity and the structure of calcium-silicate-based slags in ironmaking.” Steel Res. Int. 83 (7): 611–630. https://doi.org/10.1002/srin.201200040.
Taylor, H. F. 1997. Cement chemistry (Vol. 2). London: Thomas Telford.
Taylor, R., I. Richardson, and R. Brydson. 2010. “Composition and microstructure of 20-year-old ordinary portland cement–ground granulated blast-furnace slag blends containing 0 to 100% slag.” Cem. Concr. Res. 40 (7): 971–983. https://doi.org/10.1016/j.cemconres.2010.02.012.
Ukpata, J. O., P. M. Basheer, and L. Black. 2019. “Expansion of CEM I and slag-blended cement mortars exposed to combined chloride-sulphate environments.” Cem. Concr. Res. 123 (Sep): 105794. https://doi.org/10.1016/j.cemconres.2019.105794.
Wang, S. Y., E. McCaslin, and C. E. White. 2020. “Effects of magnesium content and carbonation on the multiscale pore structure of alkali-activated slags.” Cem. Concr. Res. 130 (Apr): 105979. https://doi.org/10.1016/j.cemconres.2020.105979.
Whittaker, M., M. Zajac, M. B. Haha, and L. Black. 2016. “The impact of alumina availability on sulfate resistance of slag composite cements.” Constr. Build. Mater. 119 (Aug): 356–369. https://doi.org/10.1016/j.conbuildmat.2016.05.015.
Whittaker, M., M. Zajac, M. B. Haha, F. Bullerjahn, and L. Black. 2014. “The role of the alumina content of slag, plus the presence of additional sulfate on the hydration and microstructure of portland cement-slag blends.” Cem. Concr. Res. 66 (Dec): 91–101. https://doi.org/10.1016/j.cemconres.2014.07.018.
Xuan, W., J. Zhang, and D. Xia. 2018. “The influence of MgO on the crystallization characteristics of synthetic coal slags.” Fuel 222 (Jun): 523–528. https://doi.org/10.1016/j.fuel.2018.02.197.
Yang, Y., K. Raipala, and L. Holappa. 2014. “Ironmaking.” Treatise Process Metall. 3 (Apr): 2–88. https://doi.org/10.1016/B978-0-08-096988-6.00017-1.
Zhang, S. F., X. Zhang, W. L. Lv, C. G. Bai, and L. Wang. 2014. “Relationship between structure and viscosity of slag.” J. Non-Cryst. Solids 402 (Oct): 214–222. https://doi.org/10.1016/j.jnoncrysol.2014.06.006.
Zhang, Y., and O. Çopuroğlu. 2022. “The role of hydrotalcite-like phase and monosulfate in slag cement paste during atmospheric and accelerated carbonation.” Cem. Concr. Compos. 132 (Sep): 104642. https://doi.org/10.1016/j.cemconcomp.2022.104642.
Zhang, Y., M. F. Liang, Y. D. Gan, and O. Çopuroğlu. 2022a. “Effect of MgO content on the quantitative role of hydrotalcite-like phase in a cement-slag system during carbonation.” Cem. Concr. Compos. 134 (Nov): 104765. https://doi.org/10.1016/j.cemconcomp.2022.104765.
Zhang, Y., E. Schlangen, and O. Çopuroğlu. 2022b. “Effect of slags of different origins and the role of sulfur in slag on the hydration characteristics of cement-slag systems.” Constr. Build. Mater. 316 (Jan): 125266. https://doi.org/10.1016/j.conbuildmat.2021.125266.
Zhang, Y., Z. Wan, L. M. de Lima Junior, and O. Çopuroğlu. 2022c. “Early age hydration of model slag cement: Interaction among , gypsum and slag with different contents.” Cem. Concr. Res. 161 (Aug): 106954. https://doi.org/10.1016/j.cemconres.2022.106954.
Zhang, Y., S. Z. Zhang, Y. Chen, and O. Çopuroğlu. 2022d. “The effect of slag chemistry on the reactivity of synthetic and commercial slags.” Constr. Build. Mater. 335 (Jun): 127493. https://doi.org/10.1016/j.conbuildmat.2022.127493.
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© 2023 American Society of Civil Engineers.
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Received: Jan 29, 2023
Accepted: Aug 28, 2023
Published online: Dec 27, 2023
Published in print: Mar 1, 2024
Discussion open until: May 27, 2024
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