Gajewicz-Jaromin, Agata M.McDonald, Peter J.Muller, Arnaud C. A.Scrivener, Karen L.2019-07-172019-07-172019-07-172019-08-0110.1016/j.cemconres.2019.05.002https://infoscience.epfl.ch/handle/20.500.14299/159170WOS:000473380700012H-1 nuclear magnetic resonance (NMR) relaxometry, supported by X-Ray diffraction and thermogravimetric analysis, has been used to characterise microstructure of white cement pastes underwater cured at temperatures in the range 10 degrees C to 60 degrees C. As the temperature increases, so the C-S-H, capillary pore water and interhydrate pore water content all increase; the ettringite and gel pore water content decrease; and the Portlandite content stays constant. A non-linear increase in the C-S-H 'solid' and 'bulk' densities, that exclude and include gel pore water respectively, has been observed with the increase of temperature. This is accompanied by a decrease in C-S -H water content but no change in the Ca/(Si + Al) ratio. The increase in the C-S-H 'solid' density has been attributed to a decrease in the number of locally stacked C-S-H layers. The increase in the C-S-H 'bulk' density is additionally attributed to the decrease in the gel porosity.Construction & Building TechnologyMaterials Science, MultidisciplinaryMaterials Scienceh-1 nuclear magnetic resonancec-s-h densityc-s-h compositioncuring temperaturec-s-hcalcium-silicate-hydrateshrinkagedensitytext::journal::journal article::research article