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- W2014469326 abstract "The progress of the hydration reactions of tricalcium silicate (C3S) has been followed using quasielastic neutron scattering (QNS) at an energy resolution of 60 μeV and a momentum transfer of q = 1 Å−1. The degree of reaction in the hydrating cement paste is inferred from the fraction of water that is chemically bound to the cement reaction products and the known stoichiometry of C3S hydration. Three different water-to-cement ratios were studied in this experiment: W/C = 0.7, 0.5 and 0.3. The results of an Avrami-model analysis of the first 15 h of the reaction are consistent with three types of C3SH2O reaction product morphology and growth mechanisms: (i) a plate-type product phase from either phase boundary growth with no nucleation; (ii) diffusion-limited growth with constant nucleation; or (iii) a needle-type product phase with phase boundary growth and constant nucleation. Analysis of the later-time diffusion-limited portion of the reaction provides apparent diffusion constants for the migration of water through the C3S hydration products. These data indicate that the diffusion constants vary approximately exponentially over the range of water-to-cement values studied." @default.
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- W2014469326 date "1997-12-01" @default.
- W2014469326 modified "2023-10-18" @default.
- W2014469326 title "Neutron scattering studies of hydrating cement pastes" @default.
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- W2014469326 doi "https://doi.org/10.1016/s0921-4526(97)00819-3" @default.
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