Micropore size analysis in hydrated cement paste by NMR

摘要

We present a time evolutionof ~1H spin-lattice relaxation rates in the laboratory (1/T_1) and in the rotating (1/T_(1Q)) frame of a synthetic cement paste.The6y typical results found for both rates allow us to follow the main hydration stages of the cement paste and the refinement of its microporosity.In particular the texturation of the porosity and the structuration of the surface of the material are evidenced on two model cement pastes.An interpretation in terms of fractal size distrution is considered as well as the effect of the curing temperature.