Nanostructure and Nanomechanics of Cement: Polydisperse Colloidal Packing

被引：158

作者：

Masoero, E. ^{[1
]}

Del Gado, E. ^{[2
]}

Pellenq, R. J-M ^{[1
,3
,4
]}

Ulm, F-J ^{[1
]}

Yip, S. ^{[5
]}

机构：

[1] MIT, Dept Civil & Environm Engn, Cambridge, MA 02139 USA

[2] Swiss Fed Inst Technol, Dept Civil Environm & Geomat Engn, CH-8093 Zurich, Switzerland

[3] CNRS, CINaM, F-13288 Marseille 09, France

[4] Aix Marseille Univ, F-13288 Marseille 09, France

[5] MIT, Dept Nucl Sci & Engn, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 109卷 / 15期

关键词：

CALCIUM-SILICATE-HYDRATE; C-S-H; MICROSTRUCTURE; DENSITY; MODEL; GELS;

D O I：

10.1103/PhysRevLett.109.155503

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Cement setting and cohesion are governed by the precipitation and growth of calcium-silicate-hydrate, through a complex evolution of microstructure. A colloidal model to describe nucleation, packing, and rigidity of calcium-silicate-hydrate aggregates is proposed. Polydispersity and particle size dependent cohesion strength combine to produce a spectrum of packing fractions and of corresponding elastic properties that can be tested against nanoindentation experiments. Implications regarding plastic deformations and reconciling current structural characterizations are discussed.

引用

页数：4

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