Microstructure Determination of Calcium-Silicate-Hydrate Globules by Small-Angle Neutron Scattering

被引：114

作者：

Chiang, Wei-Shan ^{[1
]}

Fratini, Emiliano ^{[2
,3
]}

Baglioni, Piero ^{[2
,3
]}

Liu, Dazhi ^{[4
]}

Chen, Sow-Hsin ^{[1
]}

机构：

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

[2] Univ Florence, Dept Chem, I-50019 Florence, Italy

[3] Univ Florence, CSGI, I-50019 Florence, Italy

[4] Oak Ridge Natl Lab, Spallat Neutron Source, Oak Ridge, TN 37831 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2012年 / 116卷 / 08期

关键词：

C-S-H; CEMENT; WATER; MODEL; GEL;

D O I：

10.1021/jp300745g

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The basic building block of calcium-silicate-hydrate (C-S-H) gel, which is the major hydration product of a commercial Portland cement paste, is usually referred as "globule" in the Jennings' colloidal model-II developed for C-S-H. The detailed nanostructure of the globule is so far not given quantitatively. In this paper, we determine the structural parameters of the building block with good accuracy by small-angle neutron scattering technique probing an extended interval of the scattering vector, Q from 0.015-1.0 angstrom(-1). In this Q-range an interlamellar peak at 0.65-0.80 angstrom(-1) is present, shifting as a function of the water content present in the C-S-H gel. This additional feature enables us to confirm the presence of a lamellar structure and determine the thicknesses of both the water and the hydrated calcium silicate layers respectively proper of the C-S-H globules.

引用

页码：5055 / 5061

页数：7

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