Pilot Study on Shrinkage and Fracture of Materials Based on the Alkali-Activated Slag: Influence of Curing Regime

Pilot Study on Shrinkage and Fracture of Materials Based on the Alkali-Activated Slag: Influence of Curing Regime

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The paper presents the results of a pilot study focused on the shrinkage process and fracture parameters of two fine-grained materials prepared from ground granulated blast furnace slag and silica sand. Two different activators were used - liquid sodium silicate and sodium hydroxide. The components ratio and the activator dose were the same for both materials and were as follows: activator dose of 6% Na2O by the slag weight, 1% of lignosulfonate plasticizer, and the ratio of slag:water:sand of 1:0.45:3. All specimens matured at room temperature. For each material, four curing regimes were designed with respect to the potential application on-site (especially different upper surface treatment and demoulding time). The shrinkage measurement lasted more than 2.5 years, after which fracture tests were performed on the same sets of specimens. Although only a slight nuance was in designed curing conditions, the results showed different sensitivity of investigated materials and monitored parameters to the particular curing regimes.

The paper presents the results of a pilot study focused on the shrinkage process and fracture parameters of two fine-grained materials prepared from ground granulated blast furnace slag and silica sand. Two different activators were used - liquid sodium silicate and sodium hydroxide. The components ratio and the activator dose were the same for both materials and were as follows: activator dose of 6% Na2O by the slag weight, 1% of lignosulfonate plasticizer, and the ratio of slag:water:sand of 1:0.45:3. All specimens matured at room temperature. For each material, four curing regimes were designed with respect to the potential application on-site (especially different upper surface treatment and demoulding time). The shrinkage measurement lasted more than 2.5 years, after which fracture tests were performed on the same sets of specimens. Although only a slight nuance was in designed curing conditions, the results showed different sensitivity of investigated materials and monitored parameters to the particular curing regimes.

alkali activated slag; curing regime; sodium silicate; sodium hydroxide; long term

alkali activated slag; curing regime; sodium silicate; sodium hydroxide; long term

KUCHARCZYKOVÁ, B.; ŠIMONOVÁ, H.; BÍLEK, V.; NÁPRAVNÍK, P.

18.01.2023

IOP Publishing

Spojené království Velké Británie a Severního Irska

Journal of Physics: Conference Series, Volume 2423, 5th International Conference: Innovative Materials, Structures and Technologies (IMST 2022) 28/09/2022 - 30/09/2022 Riga, Latvia

1742-6588

Journal of Physics: Conference Series

2423

1

Spojené království Velké Británie a Severního Irska

1

9

9

https://iopscience.iop.org/article/10.1088/1742-6596/2423/1/012027

http://hdl.handle.net/11012/213716

Kucharczyková_2023_J._Phys. _Conf._Ser._2423_012027