The pore solution of blended cements: a review

By A. Vollpracht, B. Lothenbach, R. Snellings, Johannes Haufe. 2016

487 citations recorded by the source corpus.

This paper is the work of working group 3 of the RILEM Technical Committee on Hydration and Microstructure of Concrete with SCM (TC 238-SCM). The pore solution is an essential but often overlooked part of hydrated cements. The composition of the cement pore solution reflects the ongoing hydration processes and determines which solid phases are stable and may precipitate, and which phases are unstable and may dissolve. The study of the cement pore solution therefore contributes to the understanding of the mechanisms as well as of the kinetics of cement hydration. This paper reviews the impact of supplementary cementitious materials (SCMs) on the pore solution composition of blended cements. In a first part, the extraction and analysis methods of cement pore solutions are reviewed, leading to a set of practical guidelines and recommendations. In a second part, an extensive literature survey is used to document the effect of the addition of SCMs (blast furnace slag, fly ash and silica fume) on the pore solution. Finally, in a third part the collected literature data are compared to thermodynamic simulations. The performance and current limitations of thermodynamic modelling of blended cement hydration are demonstrated and discussed in view of future progress.

Subfields: Building and Construction, Civil and Structural Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/959f0bff5cc86df767b9293f61ffdca5a171d7fb

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Citations in the corpus

Chloride-induced corrosion of steel rebars in simulated pore solutions of alkali-activated concretes (2017, background): “In the pore solutions associated with neat PC hydrates [27], alkali and hydroxide concentrations are about 0.”
Effect of carbonation on the pore solution of mortar (2019, background): “As mentioned above the non-carbonated CEM II mortars contain less CH than the CEM I mortar due to the clinker dilution by fly ash and the pozzolanic reaction of the fly ash [2,11,27].”
A review of characterisation methods for superabsorbent polymer (SAP) samples to be used in cement-based construction materials: report of the RILEM TC 260-RSC (2017, background): “SiO(4) 4 ), which are present in cement pore solutions only in quite minor concentrations [77, 79], have not yet been comprehensively studied.”
The steel–concrete interface (2017, background): “A recent paper [64] reviews the impact of supplementary cementitious materials (SCM) on the pore solution composition of cementitious materials.”