The influence of supplementary cementitious materials on the hydration of Dyckerhoff G-Oil cement

The influence of supplementary cementitious materials on the hydration of Dyckerhoff G-Oil cement

Článek WoS

The kinetics of early hydration reactions of Dyckerhoff G-oil cement and its blends using conduction calorimeter and thermogravimetric analysis are reported in the present paper. The coupling effect of temperature (25, 40, 50, 60, 80 degrees C) and material composition (100, 95, 90, 85, 80, 75, 70, 65% Dyckerhoff) with different substitution levels by blast slag furnace, metakaolin and limestone were analyzed on the light of hydration products and activation energy of different reactions. Besides the initial peak in the first 10 min of hydration, two or more other particular peaks characterizing the sequence of successive hydration reactions of the cement are observed, the intensities and the time position of which depend on the temperatures and on the composition of the materials. The apparent activation energies calculated from the hydration peaks characterizing the different reactions decrease with the increase in the substitution levels, but that of the second peaks (31.95 to 33.31 kJ mol(-1)) is higher than that of the former (27.88 to 31.33 kJ mol(-1)) at the same level of substitution. Thermogravimetric analysis of the samples after calorimetric measurement shows that the main hydration products are C-S-H, C-A-S-H, CH, and calcium carbonate. Their quantity depends on the material composition of the material and the temperatures of hydration.

The kinetics of early hydration reactions of Dyckerhoff G-oil cement and its blends using conduction calorimeter and thermogravimetric analysis are reported in the present paper. The coupling effect of temperature (25, 40, 50, 60, 80 degrees C) and material composition (100, 95, 90, 85, 80, 75, 70, 65% Dyckerhoff) with different substitution levels by blast slag furnace, metakaolin and limestone were analyzed on the light of hydration products and activation energy of different reactions. Besides the initial peak in the first 10 min of hydration, two or more other particular peaks characterizing the sequence of successive hydration reactions of the cement are observed, the intensities and the time position of which depend on the temperatures and on the composition of the materials. The apparent activation energies calculated from the hydration peaks characterizing the different reactions decrease with the increase in the substitution levels, but that of the second peaks (31.95 to 33.31 kJ mol(-1)) is higher than that of the former (27.88 to 31.33 kJ mol(-1)) at the same level of substitution. Thermogravimetric analysis of the samples after calorimetric measurement shows that the main hydration products are C-S-H, C-A-S-H, CH, and calcium carbonate. Their quantity depends on the material composition of the material and the temperatures of hydration.

Temperature; Material composition; Kinetics; Hydration products; CaO; SiO2; Al2O3; Fe2O3; H2O

Temperature; Material composition; Kinetics; Hydration products; CaO; SiO2; Al2O3; Fe2O3; H2O

PALOU, M.; NOVOTNÝ, R.; KUZIELOVA, E.; ŽEMLIČKA, M.; ČEPČIANSKA, J.; PODHORSKA, J.

2023

28.06.2022

SPRINGER

DORDRECHT

1388-6150

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY

147

18

Maďarsko

9935

9948

14

https://link.springer.com/article/10.1007/s10973-022-11444-y

http://hdl.handle.net/