Raman spectroscopic investigation of Friedel's salt

被引：99

作者：

Yue, Yanfei ^{[1
,2
]}

Wang, Jing Jing ^{[3
,4
]}

Basheer, P. A. Muhammed ^{[5
]}

Bai, Yun ^{[2
]}

机构：

[1] Chongqing Univ, Coll Mat Sci & Engn, 174 Shazheng St, Chongqing 400044, Peoples R China

[2] UCL, Dept Civil Environm & Geomat Engn, Gower St, London WC1E 6BT, England

[3] Trinity Coll Dublin, CRANN Res Ctr, Dublin 2, Ireland

[4] Trinity Coll Dublin, AMBER Res Ctr, Dublin 2, Ireland

[5] Univ Leeds, Sch Civil Engn, Woodhouse Lane, Leeds LS2 9JT, W Yorkshire, England

来源：

CEMENT & CONCRETE COMPOSITES | 2018年 / 86卷

基金：

英国工程与自然科学研究理事会;

关键词：

Cementitious materials; Chloride attack; Friedel's salt; Raman spectroscopy; AL-27 MAS NMR; CHLORIDE BINDING-CAPACITY; PORTLAND-CEMENT; FT-RAMAN; STRUCTURAL FEATURES; EFFECTIVE REMOVAL; PHASE-TRANSITION; PART I; HYDRATION; HYDROCALUMITE;

D O I：

10.1016/j.cemconcomp.2017.11.023

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Friedel's salt (FS) forms upon chloride binding in monosulphoaluminate (AFm) phase. This removes chlorides from the pore solution, hence, delays the initiation of steel-bar corrosion. Apparently, characterising and, in particular, monitoring the formation and the status of FS facilitate the prediction of the service life of reinforced concrete structures. Raman spectroscopy offers a potential for investigating FS. The current work characterised FS, including the synthesised pure FS, and the FS formed in a Portland cement (PC) paste powder, using a bench-mounted Raman spectrometer. The results revealed the full Raman spectra of pure FS between 200 and 4000 cm(-1), including the featured Raman bands at 534/568 cm(-1) and 783 cm(-1) which correspond to the Al-OH stretching and bending vibration of FS respectively. Furthermore, similar Raman bands of FS were identified in PC paste sample subjected to accelerated chloride attack, further confirming the potential of Raman spectroscopy for distinguishing FS in cementitious materials. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：306 / 314

页数：9

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