Studying the Hydration of a Retarded Suspension of Ground Granulated Blast-Furnace Slag after Reactivation
Building Materials and Construction Chemistry, Technische Universität Berlin, Gustav-Meyer-Allee 25, 13355 Berlin, Germany
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Academic Editors: Luciano Feo and Claudio Ferone
Materials 2016, 9(11), 933; https://doi.org/10.3390/ma9110933
Received: 30 August 2016
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Revised: 7 October 2016
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Accepted: 4 November 2016
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Published: 18 November 2016
(This article belongs to the Section Advanced Composites)
This article presents a combined use of a retarder (d-gluconic acid) and an alkaline activator (sodium hydroxide) in a binder system based on ground granulated blast-furnace slag. The properties of the retarder are extending the dormant hydration period and suppressing the generation of strength-giving phases. Different retarder concentrations between 0.25 and 1.00 wt.% regulate the intensity and the period of the retardation and also the characteristics of the strength development. The activator concentration of 30 and 50 wt.% regulates the overcoming of the dormant period and thereby the solution of the slag and hence the formation of the hydration products. The research objective is to produce a mineral binder system based on two separate liquid components. The highest concentration of retarder and activator generates the highest compressive strength and mass of hydration products—after 90 days of hydration a compressive strength of more than 50 N/mm2. The main phases are calcium silicate hydrate and hydrotalcite. Generally, the combination of retarder and activator shows a high potential in the performance increase of the hydration process.
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Keywords:
retardation; reactivation; ground granulated blast-furnace slag; d-gluconic acid; sodium hydroxide; hydration study
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Externally hosted supplementary file 1
Doi: 10.1016/j.conbuildmat.2016.06.127
Link: http://dx.doi.org/10.1016/j.conbuildmat.2016.06.127
MDPI and ACS Style
Schneider, N.; Stephan, D. Studying the Hydration of a Retarded Suspension of Ground Granulated Blast-Furnace Slag after Reactivation. Materials 2016, 9, 933. https://doi.org/10.3390/ma9110933
AMA Style
Schneider N, Stephan D. Studying the Hydration of a Retarded Suspension of Ground Granulated Blast-Furnace Slag after Reactivation. Materials. 2016; 9(11):933. https://doi.org/10.3390/ma9110933
Chicago/Turabian StyleSchneider, Nick, and Dietmar Stephan. 2016. "Studying the Hydration of a Retarded Suspension of Ground Granulated Blast-Furnace Slag after Reactivation" Materials 9, no. 11: 933. https://doi.org/10.3390/ma9110933
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