Effect of sample geometry and aggregate type on expansion due to alkali-silica reaction

被引：8

作者：

Sinno, Noura ^{[1
]}

Shehata, Medhat H. ^{[1
]}

机构：

[1] Ryerson Univ, Dept Civil Engn, Toronto, ON, Canada

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2019年 / 209卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

Concrete prism test; Alkali leaching; Field samples; Laboratory testing; Cylindrical samples; Alkali release from aggregates; FLY-ASH; CONCRETE;

D O I：

10.1016/j.conbuildmat.2019.03.103

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Late expansions due to alkali-silica reaction were observed in field samples for some aggregates and supplementary cementing materials (SCM) combinations despite meeting the 2-year expansion criterion of the concrete prism test. This fosters a research into the effect of sample geometry and aggregate reactivity on alkali leaching and expansion of lab samples. Larger samples showed less leaching compared to standard prisms. Cylinders of 100 mm-diameter showed higher expansion than 75 mm-standard prisms; however, both sample shapes showed similar expansions for one tested aggregate when used with SCM. Alkali leaching from concrete samples and alkali release from some aggregates could lead to cylindrical samples having higher expansion and better correlation to field samples compared to standard concrete prisms. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：738 / 747

页数：10

共 26 条

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[2]

[Anonymous], A23214A CSA

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