Mechanical approach in mitigating alkali-silica reaction

被引：27

作者：

Yi, CK ^{[1
]}

Ostertag, CP ^{[1
]}

机构：

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

来源：

CEMENT AND CONCRETE RESEARCH | 2005年 / 35卷 / 01期

基金：

美国国家科学基金会;

关键词：

alkali-aggregate reaction; microcracking; expansion; tensile properties; fiber reinforcement;

D O I：

10.1016/j.cemconres.2004.02.017

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The effect of steel microfibers (SMF) on alkali-silica reaction (ASR) was investigated using two types of reactive aggregates, crushed opal and a Pyrex rod of constant diameter. Cracks are less visible in the SMF mortars compared with the unreinforced mortars. Due to crack growth resistance behavior in SMF mortar specimens, the strength loss is eliminated and the ASR products remained well confined within the ASR site. The expansion and the ASR products were characterized by microprobe analysis and inductive coupled plasma (ICP) spectroscopy. The confinement due to SMF resulted in a higher Na and Si ion concentration of the ASR liquid extracted from the reaction site. The higher concentration reduced the ASR rate and resulted in a lower reactivity of the reactive Pyrex rods in SMF mortars. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：67 / 75

页数：9

共 22 条

[1]

Ahmed T, 1999, ACI STRUCT J, V96, P557

[2] The influence of metakaolin and silica fume on the chemistry of alkali-silica reaction products [J].

Aquino, W ;

Lange, DA ;

Olek, J .

CEMENT & CONCRETE COMPOSITES, 2001, 23 (06) :485-493

[3]

*ASTM C, 1999, ANN BOOK ASTM STAND, P650

[4] Microstructural studies of alkali-silica reaction in fly ash concrete immersed in alkaline solutions [J].

Bleszynski, RF ;

Thomas, MDA .

ADVANCED CEMENT BASED MATERIALS, 1998, 7 (02) :66-78

[5]

Clayton N., 1990, STRUCT ENG, V68, P287

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

Diamond, S .

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

[7]

Diamond S., 1992, P 9 INT C ALK AGGR R, P269

[8] ALKALI-SILICA REACTION - THE RELATION BETWEEN PORE SOLUTION CHARACTERISTICS AND EXPANSION TEST-RESULTS [J].

DURAND, B ;

BERARD, J ;

ROUX, R ;

SOLES, JA .

CEMENT AND CONCRETE RESEARCH, 1990, 20 (03) :419-428

[9] DELETERIOUS EXPANSION OF CONCRETE DUE TO ALKALI SILICA REACTION - INFLUENCE OF PFA AND SLAG [J].

HOBBS, DW .

MAGAZINE OF CONCRETE RESEARCH, 1986, 38 (137) :191-205

[10]

JUENGER MCG, IN PRESS CEM CONCR R

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