A rapid-hardening and dimensionally stable calcium sulfoaluminate (CSA) cement (i), consisting of 80% CSA clinker and 20% anhydrite by mass, and an expansive CSA-based binder (ii), composed by 44% CSA clinker, 16% anhydrite and 40% high-strength and rapid-hardening CEM I 52.5 R Portland cement (used also as a reference term), were cured with a 0.5 water/solid mass ratio from 4 hours to 56 days and submitted to microstructural (differential thermal-thermogravimetric and X-ray diffraction analyses, mercury intrusion porosimetry, scanning electron microscopy) and physical/mechanical (workability, shrinkage, compressive strength) tests. DTA-TG and XRD analyses assessed the role played by the main reactions occurring in the hydrating systems. The porosimetric and morphological features well correlated with the expansive/non-expansive behavior of the investigated cements.

Microstructural features and technical properties of calcium sulfoaluminate-based cements

TELESCA, ANTONIO;MARROCCOLI, Milena;TOMASULO, MICHELE;VALENTI, Gian Lorenzo;
2013-01-01

Abstract

A rapid-hardening and dimensionally stable calcium sulfoaluminate (CSA) cement (i), consisting of 80% CSA clinker and 20% anhydrite by mass, and an expansive CSA-based binder (ii), composed by 44% CSA clinker, 16% anhydrite and 40% high-strength and rapid-hardening CEM I 52.5 R Portland cement (used also as a reference term), were cured with a 0.5 water/solid mass ratio from 4 hours to 56 days and submitted to microstructural (differential thermal-thermogravimetric and X-ray diffraction analyses, mercury intrusion porosimetry, scanning electron microscopy) and physical/mechanical (workability, shrinkage, compressive strength) tests. DTA-TG and XRD analyses assessed the role played by the main reactions occurring in the hydrating systems. The porosimetric and morphological features well correlated with the expansive/non-expansive behavior of the investigated cements.
2013
978-7-900503-64-0
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11563/63738
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