The distribution and the peak area of the transverse relaxation time (T2) of water in a fresh filling slurry are studied by the lowfield Nuclear Magnetic Resonance (NMR) to obtain the water distribution and the evolution law in the fresh filling slurry during the early hydration. The results are as follows: During the early hydration of the filling slurry, the T2 distribution of water includes three peaks. Peak 1 represents the signal generated by the adsorbed water in the filling slurry; peak 2 is the signal generated by the pore water between solid particles; peak 3 stands for the signal generated by the free water in the filling slurry. With the increase of the hydration time, the 1st peak area decreases continuously, indicating the transformation from the adsorbed water into the chemically bound water and the free water; the 2nd peak area fluctuates, but remains stable in general, indicating that the pore water changes not significantly; the increase of the 3rd peak area shows the bleeding phenomenon in the fresh filling slurry. With the increase of the hydration time, the sum of the three peak areas is constantly reducing, indicating the process of the adsorbed water transforming into the chemically bound water in the filling slurry.
ZHOU Keping
,
AI Kaiming
,
ZHANG Jian
,
LI Jielin
. Nuclear Magnetic Rresonance Characteristics in Fresh Filling Slurry[J]. Science & Technology Review, 2013
, 31(36)
: 50
-53
.
DOI: 10.3981/j.issn.1000-7857.2013.36.008
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