Print Email Facebook Twitter Ageing of portland cement concrete cured under moist conditions Title Ageing of portland cement concrete cured under moist conditions Author Yu, Z. Ye, G. Van Breugel, K. Chen, W. Faculty Civil Engineering and Geosciences Department Structural Engineering Date 2014-05-26 Abstract Deterioration of microstructure in cement concrete will cause changes in the transport properties of the concrete. Transport properties at different ages of the concrete provide information about the microstructural changes of the material. A way to measure the transport properties, i.e. the chloride diffusion coefficient, in the laboratory is rapid chloride migration (RCM) Test. With this test, the resistance of concrete to chloride ingress is evaluated. Changing losing resistance represents deterioration and ageing of concrete. In this study, RCM tests were carried out for Portland cement concrete cured in moist conditions at various curing ages up to 3 years. Scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/EDS) and X-ray diffraction (XRD) analysis were performed to identify the reaction product, like delayed ettringite. The experimental results show that the resistance of Portland cement concrete to chloride ingress decreases when ettringite is formed in concrete. Based on the result it is concluded that delayed ettringite formation contributes to the deterioration of Portland cement concrete, and should thus be considered as a relevant factor in the ageing process of concrete structures at moist curing condition. Subject ageing of concreteDEFPortland cement concreteRCM Test To reference this document use: http://resolver.tudelft.nl/uuid:f329fec6-6539-4cfc-902f-aa9272c24353 Publisher DCMat Ageing Centre, Delft University of Technology ISBN 978-94-6186-314-0 Source AMS 14: Proceedings of the 1st Ageing of Materials & Structures Conference, Delft, The Netherlands, 26-28 May 2014 Part of collection Institutional Repository Document type conference paper Rights (c) The authors Files PDF 308305.pdf 538.17 KB Close viewer /islandora/object/uuid:f329fec6-6539-4cfc-902f-aa9272c24353/datastream/OBJ/view