Determination of the elastic properties of amorphous materials: Case study of alkali-silica reaction gel

被引：24

作者：

Moon, Juhyuk ^{[1
]}

Speziale, Sergio ^{[2
]}

Meral, Cagla ^{[3
,4
]}

Kalkan, Bora ^{[5
]}

Clark, Simon M. ^{[5
,6
]}

Monteiro, Paulo J. M. ^{[3
]}

机构：

[1] SUNY Stony Brook, Dept Mech Engn, Civil Engn Program, Stony Brook, NY 11794 USA

[2] Deutsch GeoForschungsZentrum GFZ, D-14473 Potsdam, Germany

[3] Univ Calif Berkeley, Dept Civil & Environm Engn, Berkeley, CA 94720 USA

[4] Middle E Tech Univ, Dept Civil Engn, TR-06800 Ankara, Turkey

[5] Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA USA

[6] Macquarie Univ, Dept Earth & Planetary Sci, N Ryde, NSW 2109, Australia

来源：

CEMENT AND CONCRETE RESEARCH | 2013年 / 54卷

关键词：

Amorphous material; X-ray diffraction; Alkali-aggregate reaction; Elastic moduli; HIGH-PRESSURE; SINGLE-CRYSTAL; ASR GEL; TOBERMORITE; SCATTERING; CONSTANTS; ALUMINATE; KINETICS; DENSITY; STRESS;

D O I：

10.1016/j.cemconres.2013.08.012

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The gel formed during alkali-silica reaction (ASR) can lead to cracking and deterioration of a concrete structure. The elastic properties of the ASR gel using X-ray absorption and Brillouin spectroscopy measurements are reported. X-ray absorption was used to determine the density of the gel as a function of pressure, and the result yields an isothermal bulk modulus of 33 +/- 2 GPa. Brillouin spectroscopy was applied to measure isentropic bulk (24.9-34.0 GPa) and shear moduli (8.7-10.1 GPa) of the gel. The range of values obtained is attributed to the variable composition of samples that were collected under field conditions. Results suggested that amorphous silica becomes expanded and compressible as it absorbs water molecules and alkali ions. This could explain high gel migration rates through the complex pore structures in concrete. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：55 / 60

页数：6

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