Investigation of the surface structure and elastic properties of calcium silicate hydrates at the nanoscale

被引:81
作者
Plassard, C
Lesniewska, E [1 ]
Pochard, I
Nonat, A
机构
[1] Univ Bourgogne, CNRS, UMR 5027, Phys Lab LPUB, F-21078 Dijon, France
[2] Univ Bourgogne, CNRS, UMR 5613, Chem Lab LPUB, F-21078 Dijon, France
关键词
atomic force microscopy; surface structure; nanoindentation; elasticity; nanophase materials;
D O I
10.1016/j.ultramic.2003.11.012
中图分类号
TH742 [显微镜];
学科分类号
摘要
This work is the first step towards the understanding of the structure of calcium silicate hydrate (C-S-H), the main constituent of cement paste, at the nanoscale. The first demonstration of atomic-resolution imaging of the (C-S-H) surface with an atomic force microscope (AFM) was performed. C-S H nanoparticles (60 x 30 x 5 nm(3)) were partially recrystallized by Ostwald ripening after long-term equilibrium in saturated calcium hydroxide solution of different concentration, leading to C-S-H of different calcium/silicon ratio (Ca/Si). The results of atomic resolution made possible the investigation of the C-S-H cell surface parameters. The surface layer structure depended on the calcium hydroxide concentration with which it equilibrated. The change in structural properties perpendicular to the C-S-H layer was probed by modifying AFM for nanoindentation hardness measurements with a depth of indentation as low as 1 nm. The change in elastic modulus depending on the calcium/silicon ratio was evaluated and correlated in the change in structural parameters in this direction as estimated by X-ray diffraction. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:331 / 338
页数:8
相关论文
共 27 条
[1]  
[Anonymous], 1995, ADV CEM RES
[2]   Nano- to microscale wear and mechanical characterization using scanning probe microscopy [J].
Bhushan, B .
WEAR, 2001, 251 :1105-1123
[3]   Mechanical properties of in situ demineralised human enamel measured by AFM nanoindentation [J].
Finke, M ;
Hughes, JA ;
Parker, DM ;
Jandt, KD .
SURFACE SCIENCE, 2001, 491 (03) :456-467
[4]   Correlating surface forces with surface reactivity of gypsum crystals by atomic force microscopy. Comparison with theological properties of plaster [J].
Finot, E ;
Lesniewska, E ;
Goudonnet, JP ;
Mutin, JC ;
Domenech, M ;
Kadi, AA .
SOLID STATE IONICS, 2001, 141 :39-46
[5]   Investigations of surface forces between gypsum crystals in electrolytic solutions using microcantilevers [J].
Finot, E ;
Lesniewska, E ;
Mutin, JC ;
Goudonnet, JP .
JOURNAL OF CHEMICAL PHYSICS, 1999, 111 (14) :6590-6598
[6]   Correlation between surface forces and surface reactivity in the setting of plaster by atomic force microscopy [J].
Finot, E ;
Lesniewska, E ;
Goudonnet, JP ;
Mutin, JC .
APPLIED SURFACE SCIENCE, 2000, 161 (3-4) :316-322
[7]   THE CRYSTAL STRUCTURE OF FOSHAGITE [J].
GARD, JA ;
TAYLOR, HFW .
ACTA CRYSTALLOGRAPHICA, 1960, 13 (10) :785-793
[8]   Direct observation of the growth of calcium silicate hydrate on alite and silica surfaces by atomic force microscopy [J].
Gauffinet, S ;
Finot, E ;
Lesniewska, R ;
Nonat, A .
COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE II FASCICULE A-SCIENCES DE LA TERRE ET DES PLANETES, 1998, 327 (04) :231-236
[9]  
GAUFFINET S, 1997, P 2 INT RILEM S RILE
[10]   SI-29 MAGIC ANGLE SPINNING NUCLEAR MAGNETIC-RESONANCE STUDY OF CALCIUM SILICATE HYDRATES [J].
GRUTZECK, M ;
BENESI, A ;
FANNING, B .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1989, 72 (04) :665-668