Studying the Hydration of a Retarded Suspension of Ground Granulated Blast-Furnace Slag after Reactivation
AbstractThis 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. View Full-Text
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Schneider, N.; Stephan, D. Studying the Hydration of a Retarded Suspension of Ground Granulated Blast-Furnace Slag after Reactivation. Materials 2016, 9, 933.
Schneider N, Stephan D. Studying the Hydration of a Retarded Suspension of Ground Granulated Blast-Furnace Slag after Reactivation. Materials. 2016; 9(11):933.Chicago/Turabian Style
Schneider, Nick; Stephan, Dietmar. 2016. "Studying the Hydration of a Retarded Suspension of Ground Granulated Blast-Furnace Slag after Reactivation." Materials 9, no. 11: 933.
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