The influence of the filler effect on the sulfate requirement of blended cements

By F. Zunino, Karen L. Scrivener. 2019

273 citations recorded by the source corpus.

Abstract In some blended cements, the optimum amount of sulfate addition differs from that observed in OPC. This study aims to understand the mechanism behind the impact of two SCMs, namely metakaolin and limestone, on the sulfate balance of blended cements. No significant impact of the aluminum content of these SCMs was observed. Instead, it is observed that the filler effect of the SCM, which accelerates the reaction of alite, is the main factor impacting the sulfate balance. As the rate of precipitation of C-S-H is increased, more sulfate is adsorbed by the C-S-H and consequently, the depletion of gypsum is reached earlier in time during the hydration process. A relationship between heat release at the onset of the aluminate peak and the gypsum content of the system was established.

Subfields: Civil and Structural Engineering

View Paper: https://www.semanticscholar.org/paper/8986142f2b93807e9b81fc6fe4fae4c2f80f6719

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In Civil and Structural Engineering

Citations in the corpus

Improving printability of limestone-calcined clay-based cementitious materials by using viscosity-modifying admixture (2020, background): “All of them showed the main hydration peak after the dormant period, a shoulder (second peak) that may be attributed to the depletion of sulfate, and a small slope (third peak) due to the formation of AFm phases [60].”
Factors influencing the sulfate balance in pure phase C3S/C3A systems (2020, background): “Contents lists available at ScienceDirect Cement and Concrete Research journal homepage: www.elsevier.com/locate/cemconres Factors influencing the sulfate balance in pure phase C3S/C3A systems Franco Zunino⁎, Karen Scrivener Laboratory of Construction Materials, EPFL STI IMX LMC, École Polytechnique”
The reaction between metakaolin and limestone and its effect in porosity refinement and mechanical properties (2021, methodology): “In [13], it was shown that this enhancement influences the sulfate balance of LC3 systems.”
Effects of sulfates on the hydration of Portland cement – A review (2021, methodology): “To adjust the sulfate balance here, required adding 3 wt% of gypsum to the LC(3) 50 cement [9].”