Session

Civil Engineering, Infrastructure and Environment

Description

Ternary binders are defined in this study as compositions of Calcium Aluminate Cement (CAC), Ordinary Portland Cement (OPC) and Calcium Sulfate (CS̅). Several mixtures were studied, calorimetric and shrinkage technique has been used to follow the hydration during 24 hours. The XRD technique is used as support in the analysis of the hydration products. The results have shown that the initial amount of ��� and �� play a key role in the hydration of ��/���/�� mixtures and especially affect the formation of ettringite. The mechanism of reactions (hydration kinetic) and the reactions speed (acceleration or retardation) depends by the aggregates (LSP, QP) put in the different binders. The addition of re-dispersible powders showed retardation in hydration kinetics, longer setting times and also changed the dimensional stability. Comparison of the phase development monitored by in-situ XRD was performed.

Keywords:

Ternary binders, Calorimetry, Shrinkage, re-dispersible powder

Proceedings Editor

Edmond Hajrizi

ISBN

978-9951-437-65-3

First Page

44

Last Page

49

Location

Durres, Albania

Start Date

29-10-2017 5:00 PM

End Date

29-10-2017 5:15 PM

DOI

10.33107/ubt-ic.2017.43

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Oct 29th, 5:00 PM Oct 29th, 5:15 PM

Investigation of ternary binder based systems in terms of Calorimetry, Shrinkage and In-Situ XRD

Durres, Albania

Ternary binders are defined in this study as compositions of Calcium Aluminate Cement (CAC), Ordinary Portland Cement (OPC) and Calcium Sulfate (CS̅). Several mixtures were studied, calorimetric and shrinkage technique has been used to follow the hydration during 24 hours. The XRD technique is used as support in the analysis of the hydration products. The results have shown that the initial amount of ��� and �� play a key role in the hydration of ��/���/�� mixtures and especially affect the formation of ettringite. The mechanism of reactions (hydration kinetic) and the reactions speed (acceleration or retardation) depends by the aggregates (LSP, QP) put in the different binders. The addition of re-dispersible powders showed retardation in hydration kinetics, longer setting times and also changed the dimensional stability. Comparison of the phase development monitored by in-situ XRD was performed.