Influence of mineralogical and chemical compositions on alkali-silica-reaction of Tennessee limestones

被引：9

作者：

Abd-Elssamd, Ammar ^{[1
]}

Ma, Zhongguo John ^{[1
]}

Hou, Hugh ^{[2
]}

Le Pape, Yann ^{[3
]}

机构：

[1] Univ Tennessee, Knoxville, TN 37996 USA

[2] Wiss Janney Elstner Associates WJE Inc, Northbrook, IL 60062 USA

[3] Oak Ridge Natl Lab, One Bethel Valley Rd, Oak Ridge, TN 37831 USA

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2020年 / 261卷

关键词：

alkali-aggregate reaction (AAR); alkali-silica reaction (ASR); alkali-carbonate reaction (ACR); Siliceous and dolomitic limestones; Mitigation; Silica content; Rate of expansion; Concrete deterioration; ASR in field concrete; DEFORMED GRANITIC-ROCKS; CONCRETE; EXPANSION; MICROSTRUCTURE; MORTARS; SIZE;

D O I：

10.1016/j.conbuildmat.2020.119916

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The paper aims to identify potential correlations between mineralogical and chemical compositions of AAR reactive dolomitic limestone aggregates from Tennessee and their expansion on ASTM C1293 for quick evaluation of reactivity. The chemical compositions of 26 limestones, namely the silica content (SiO2), showed a strong correlation with the expansion in the concrete prism test. The early and highly expansive limestones are characterized by a high clay/mica content (>5%). The reactivity of Tennessee limestones is mainly caused by crypto/microcrystalline quartz, chert, and finely disseminated silica in carbonate and clay/mica matrices, and it can be reasonably evaluated using X-ray diffraction and chemical analysis coupled with petrographic examinations. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页数：21

共 57 条

[1] Effect of Alkali-Silica Reaction Expansion Rate and Confinement on Concrete Degradation [J].