Print Email Facebook Twitter Development of interior relative humidity due to self-desiccation in blended cementitious system Title Development of interior relative humidity due to self-desiccation in blended cementitious system Author Zhang, Y. (TU Delft Materials and Environment) Ye, G. (TU Delft Materials and Environment) Contributor Kielsgaard Hansen, Kurt (editor) Rode, Carsten (editor) Nilsson, Lars-Olof (editor) Date 2016 Abstract In engineering practise, interior relative humidity (RH) of concrete significantly affects the transport properties and thus the service life of concrete structures. In this paper, the development of RH due to self-desiccation in blended cement pastes was studied from 1 day to 1.5 years. The pore structure and non-evaporable water content at same ages were determined by mercury intrusion porosimetry and thermogravimetric analysis, respectively. The results revealed that interior RH was significantly reduced at the first 105 days’ curing and falls off slightly afterwards, regardless of water to binder ratios and type of blends. Compared to ordinary Portland cement (OPC) paste, the OPC paste blended with slag shows much lower interior RH, whereas the addition of fly ash slightly increases the interior RH. Minor amount of limestone addition i.e., 5% wt. greatly increases the RH in ternary system consisting of OPC, slag and limestone, whilst slightly decreases the RH in OPC paste blended with fly ash. In the presence of blends, high total porosity corresponds to low interior RH. In case of self-desiccation, it is concluded that interior RH is mainly controlled by average pore size in the cement-based materials. To reference this document use: http://resolver.tudelft.nl/uuid:84191c68-3d45-4a19-922e-ffc066840e88 Publisher RILEM Publications S.A.R.L., Paris, France ISBN 978-2-35158-178-0 Source Proceedings of the International RILEM Conference Materials, Systems and Structures in Civil Engineering 2016: Segment on Moisture in Materials and Structures Event International RILEM Conference on Materials, Systems and Structures in Civil Engineering, 2016-08-22 → 2016-08-24, Technical University of Denmark, Lyngby, Denmark Part of collection Institutional Repository Document type conference paper Rights © 2016 Y. Zhang, G. Ye Files PDF MSSCE2016_DEVELOPMENT_OF_ ... SYSTEM.pdf 428.39 KB Close viewer /islandora/object/uuid:84191c68-3d45-4a19-922e-ffc066840e88/datastream/OBJ/view