Influence of silica fume on the microstructure of cement pastes: New insights from 1H NMR relaxometry
By A. Muller, Karen L. Scrivener, J. Skibsted, A. Gajewicz, P. McDonald. 2015
211 citations recorded by the source corpus.
H-1 NMR has been used to characterise white Portland cement paste incorporating 10 wt.% of silica fume. Samples were measured sealed throughout the hydration without sample drying. Paste compositions and C-S-H characteristics are calculated based on H-1 NMR signal intensities and relaxation analysis. The results are compared with a similar study of plain white cement paste. While the presence of silica fume has little influence on C-S-H densities, the chemical composition is impacted. After 28 days of sealed hydration, the Ca/(Si + Al) ratio of the C-S-H is 1.33 and the H2O/(Si + Al) ratio is 1.10 when 10% of silica fume is added to the white cement. A densification of the C-S-H with time is observed. There are no major changes in capillary, C-S-H gel and interlayer pore sizes for the paste containing silica fume compared to the plain white cement paste. However, the gel/interlayer water ratio increases in the silica fume blend. (C) 2015 Elsevier Ltd. All rights reserved.
Subfields: Civil and Structural Engineering, Mechanics of Materials, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/99854eb9bdb14f26f9b2818ecbfbbacee5cf33e5
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In Civil and Structural Engineering
- B. Lothenbach
- J. Provis
- R. Myers
- Brant Walkley
- S. A. Bernal
- Dmitrii A. Kulik
- T. Matschei
- Belay Zeleke Dilnesa
In Mechanics of Materials
In Nuclear and High Energy Physics
Citations in the corpus
- Cemdata18: A chemical thermodynamic database for hydrated Portland cements and alkali-activated materials (2019, methodology): “structural water and water pre606 sent in the interlayer [78, 79]), also depending on the Ca/Si ratio and the synthesis route, variable par607 ticle morphology, stacking, and “gel” water content, i.”
- Solid-state nuclear magnetic resonance spectroscopy of cements (2019, methodology): “More recently, (1)H NMR relaxometry has been used to quantify all the water present, as well as the size and volume of discrete population of pores containing this water, in hydrated white PC both with [8] and without [434,435] silica fume additions.”