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1993
Conference Proceeding
Titel
SANS study of hardening cement pastes and solid state nuclear track detectors
Abstract
Dry Portland cement, silicia fume, hydrating Portland cement paste and solid nuclear track detectors (SSNTD) were studied by small-angle neutron scattering (SANS). Various samples of quartz sheres were used for methodical studies investigating the SANS effects. The Porod's potential law holds for both powder samples of quartz spheres. In the measured Omega-region the hardening cement paste does not show a Porod-like behaviour of SANS curves. By observing the shape of scattering curves taken at differnet times after the onset of hydration within the first 92 days, some evolution of the inner structure in the hardened cement paste can be noted. Furthermore foils of the PETP type were investigated by SANS. The irradiated foils show a Guinier-like region on the scattering curve. The measured radius of gyration is of about 8 nm. By annealing (at 160 degree Centigrade) the radius of gyration is reduced.