MONITORING OF THE HYDRATION PROCESS OF HARDENING CEMENT PASTES BY SMALL-ANGLE NEUTRON-SCATTERING

The stage of hydration of hardened cement paste (hcp) has been investigated by small-angle neutron scattering (SANS) from the beginning of the hydration process up to 28 days. A special mixture of H2O and D2O eliminating the various influences of the clinker phases was used as mixing water. SANS-experiments have shown the correspondence of the development of the radii of gyration with the increasing volume of the hydration products. Therefore the radius of gyration is a useful scattering parameter for the characterization of the hydration progress. © 1990.