Aggregation of Calcium Silicate Hydrate Nanoplatelets

被引：28

作者：

Delhorme, Maxime ^{[1
,2
]}

Labbez, Christophe ^{[1
]}

Turesson, Martin ^{[1
]}

Lesniewska, Eric ^{[1
]}

Woodward, Cliff E. ^{[3
]}

Jonsson, Bo ^{[2
]}

机构：

[1] Univ Bourgogne Franche Comte, CNRS, UMR 6303, ICB, FR-21000 Dijon, France

[2] Ctr Chem, Theoret Chem, POB 124, S-22100 Lund, Sweden

[3] Univ New S Wales, PEMS, 260x, Canberra, ACT, Australia

来源：

LANGMUIR | 2016年 / 32卷 / 08期

关键词：

MONTE-CARLO SIMULATIONS; CHARGED PLATELETS; SURFACE; GROWTH; TRICALCIUM; CLUSTERS; DENSITY;

D O I：

10.1021/acs.langmuir.5b03846

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We study the aggregation of calcium silicate hydrate nanoplatelets on a surface by means of Monte Carlo and molecular dynamics simulations at thermodynamic equilibrium. Calcium silicate hydrate (C-S-H) is the main component formed in cement and is responsible for the strength of the material. The hydrate is formed in early cement paste and grows to form platelets on the nanoscale, which aggregate either on dissolving cement particles or on auxiliary particles. The general result is that the experimentally observed variations in these dynamic processes generically called growth can be rationalized from interaction free energies, that is, from pure thermodynamic arguments. We further show that the surface charge density of the particles determines the aggregate structures formed by C-S-H and thus their growth modes.

引用

页码：2058 / 2066

页数：9

共 47 条

[1] Composition and density of nanoscale calcium-silicate-hydrate in cement
Allen, Andrew J.
Thomas, Jeffrey J.
Jennings, Hamlin M.
[J]. NATURE MATERIALS, 2007, 6 (04) : 311 - 316
[2] Model colloidal fluid with competing interactions: Bulk and interfacial properties
Archer, A. J.
Pini, D.
Evans, R.
Reatto, L.
[J]. JOURNAL OF CHEMICAL PHYSICS, 2007, 126 (01)
[3] SWELLING OF CALCIUM MONTMORILLONITE
BLACKMORE, AV
WARKENTIN, BP
[J]. NATURE, 1960, 186 (4727) : 823 - 824
[4] HYDRATION OF PORTLAND-CEMENT
DOUBLE, DD
HELLAWELL, A
PERRY, SJ
[J]. PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 1978, 359 (1699): : 435 - &
[5] Fairweather G.W., 1986, An introduction to community experimentation: Theory, methods and practice
[6] Study of C-S-H growth on C3S surface during its early hydration
Garrault, S
Finot, E
Lesniewska, E
Nonat, A
[J]. MATERIALS AND STRUCTURES, 2005, 38 (278) : 435 - 442
[7] Hydrated layer formation on tricalcium and dicalcium silicate surfaces: Experimental study and numerical simulations
Garrault, S
Nonat, A
[J]. LANGMUIR, 2001, 17 (26) : 8131 - 8138
[8] Garrault S., 1998, CR HEBD ACAD SCI, V327, P213
[9] Experimental investigation of calcium silicate hydrate (C-S-H) nucleation
Garrault-Gauffinet, S
Nonat, A
[J]. JOURNAL OF CRYSTAL GROWTH, 1999, 200 (3-4) : 565 - 574
[10] A transmission electron microscopy study of interfaces and matrix homogeneity in ultra-high-performance cement-based materials
Gatty, L
Bonnamy, S
Feylessoufi, A
Clinard, C
Richard, P
Van Damme, H
[J]. JOURNAL OF MATERIALS SCIENCE, 2001, 36 (16) : 4013 - 4026

← 1 2 3 4 5 →