Using lithium nitrate and pozzolanic glass powder in concrete as ASR suppressors

被引：80

作者：

Taha, Bashar ^{[1
]}

Nounu, Ghassan ^{[1
]}

机构：

[1] Univ W England, Fac Built Environm, Bristol BS16 1QY, Avon, England

来源：

CEMENT & CONCRETE COMPOSITES | 2008年 / 30卷 / 06期

关键词：

pozzolanic glass powder; lithium nitrate; recycled glass sand; alkali-silica reaction; ASR suppressors; SEM; XRF; XRD;

D O I：

10.1016/j.cemconcomp.2007.08.010

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This investigation studies the influence of two different mineral admixtures, lithium nitrate (Li) and pozzolanic glass powder (PGP) on the expansion induced by alkali-silica reaction (ASR). Four numbers of concrete prisms were produced for each concrete mix to measure the expansion resulted from the ASR according to the test method of the BS 812-123:1999. Chemical analysis was performed using X-ray spectra. Test results confirmed that Li and PGP have significantly reduced the ASR expansion. Lower calcium to silica ratio (Ca/Si) was found in concrete mix contains (PGP) because of the high amorphous reactive silica and low calcium content in PGP compared to ordinary Portland cement CEM1. Similar components and minerals phases were obtained in different concrete mixes by using XRD. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：497 / 505

页数：9

共 20 条

[1]

[Anonymous], 2000, 197 BS EN 1

[2]

*BS, 1999, 812 BS 123

[3]

*BUILD RES EST, 1999, 330 BRE 1

[4] ROLE OF CA(OH)2 IN THE BREAKDOWN OF PORTLAND-CEMENT CONCRETE DUE TO ALKALI-SILICA REACTION [J].

CHATTERJI, S .

CEMENT AND CONCRETE RESEARCH, 1979, 9 (02) :185-188

[5] Alkali silica reactions - Some paradoxes [J].

Diamond, S .

CEMENT & CONCRETE COMPOSITES, 1997, 19 (5-6) :391-401

[6]

DIAMOND S, 1989, MATER RES SOC SYMP P, V137, P83

[7]

DIAMOND S, 1992, P 9 INT C ALK AGGR R, V2, P169

[8]

Folliard K., 2003, Guidelines for the Use of Lithium to Mitigate or Prevent ASR

[9]

HANSEN WC, 1944, ACI J P, V15, P213

[10]

HELMUTH R, 1993, SHRPC432 NAT RES COU

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