Chloride ion binding capacity of aluminoferrites

被引：96

作者：

Csizmadia, J

Balázs, G ^{[1
]}

Tamás, FD

机构：

[1] Tech Univ Budapest, Dept Bldg Mat & Engn Geol, Budapest, Hungary

[2] Univ Veszprem, Dept Silicat & Mat Engn, H-8201 Veszprem, Hungary

来源：

CEMENT AND CONCRETE RESEARCH | 2001年 / 31卷 / 04期

基金：

匈牙利科学研究基金会;

关键词：

calcium aluminoferrite; chloride; thermal analysis; X-ray diffraction;

D O I：

10.1016/S0008-8846(01)00458-6

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The hydration of aluminoferrites (C(4)AF, C(6)AF(2) and C(6)A(2)F) and their mixture with gypsum (up to 10/5 ratio) was investigated as well as their chloride binding capacity (after immersion in 10% NaCl solution) by thermal tests (DTG and TGA) and X-ray diffraction (XRD). Hydration products of these aluminoferrites are similar to that of C(3)A, but amorphous AH(3) and/or FH3 are formed, and transformation of metastable (hexagonal hydrates) to the stable (hydrogarnet) phase is slower. Iron content of aluminoferrites determines the rate of hydration reactions: hydration rate increases in the order C(6)A(2)F > C(4)AF > C(6)AF(2) In the case of C(4)AF + gypsum mixtures, monosulfate was found prior to the total exhaustion of gypsum. After salt treatment, iron-containing Friedel's salt or Kuzel's salt was found. Characteristics of DTG peaks are described and interpreted. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：577 / 588

页数：12

共 18 条

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BIMINYAURI UA, 1998, CEMENT CONCRETE RES, V28, P1713

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