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Title: Quantitative assessment of alkali-reactive aggregate mineral content through XRD using polished sections as a supplementary tool to RILEM AAR-1 (petrographic method)

Abstract

The mineral content of 5 aggregate samples from 4 different countries, including reactive and non-reactive aggregate types, was assessed quantitatively by X-ray diffraction (XRD) using polished sections. Additionally, electron probe microanalyzer (EPMA) mapping and cathodoluminescence (CL) were used to characterize the opal-CT identified in one of the aggregate samples. Critical review of results from polished sections against traditionally powdered specimen has demonstrated that for fine-grained rocks without preferred orientation the assessment of mineral content by XRD using polished sections may represent an advantage over traditional powder specimens. Comparison of data on mineral content and silica speciation with expansion data from PARTNER project confirmed that the presence of opal-CT plays an important role in the reactivity of one of the studied aggregates. Used as a complementary tool to RILEM AAR-1, the methodology suggested in this paper has the potential to improve the strength of the petrographic method.

Authors:
 [1];  [1];  [2]
  1. Norwegian University of Science and Technology (NTNU), Department of Geology and Mineral Resources Engineering, Sem Saelands vei 1, N-7491 Trondheim (Norway)
  2. Geological Survey of Norway, Department of Industrial Minerals and Metals, PO Box 6315 Sluppen, N-7491 Trondheim (Norway)
Publication Date:
OSTI Identifier:
22149354
Resource Type:
Journal Article
Resource Relation:
Journal Name: Cement and Concrete Research; Journal Volume: 42; Journal Issue: 11; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CATHODOLUMINESCENCE; ELECTRON MICROPROBE ANALYSIS; ELECTRON PROBES; GRAIN ORIENTATION; OPALS; PETROGRAPHY; REACTIVITY; ROCKS; X-RAY DIFFRACTION

Citation Formats

Castro, Nelia, E-mail: nelia.castro@ntnu.no, Sorensen, Bjorn E., and Broekmans, Maarten A.T.M. Quantitative assessment of alkali-reactive aggregate mineral content through XRD using polished sections as a supplementary tool to RILEM AAR-1 (petrographic method). United States: N. p., 2012. Web. doi:10.1016/J.CEMCONRES.2012.08.004.
Castro, Nelia, E-mail: nelia.castro@ntnu.no, Sorensen, Bjorn E., & Broekmans, Maarten A.T.M. Quantitative assessment of alkali-reactive aggregate mineral content through XRD using polished sections as a supplementary tool to RILEM AAR-1 (petrographic method). United States. doi:10.1016/J.CEMCONRES.2012.08.004.
Castro, Nelia, E-mail: nelia.castro@ntnu.no, Sorensen, Bjorn E., and Broekmans, Maarten A.T.M. Thu . "Quantitative assessment of alkali-reactive aggregate mineral content through XRD using polished sections as a supplementary tool to RILEM AAR-1 (petrographic method)". United States. doi:10.1016/J.CEMCONRES.2012.08.004.
@article{osti_22149354,
title = {Quantitative assessment of alkali-reactive aggregate mineral content through XRD using polished sections as a supplementary tool to RILEM AAR-1 (petrographic method)},
author = {Castro, Nelia, E-mail: nelia.castro@ntnu.no and Sorensen, Bjorn E. and Broekmans, Maarten A.T.M.},
abstractNote = {The mineral content of 5 aggregate samples from 4 different countries, including reactive and non-reactive aggregate types, was assessed quantitatively by X-ray diffraction (XRD) using polished sections. Additionally, electron probe microanalyzer (EPMA) mapping and cathodoluminescence (CL) were used to characterize the opal-CT identified in one of the aggregate samples. Critical review of results from polished sections against traditionally powdered specimen has demonstrated that for fine-grained rocks without preferred orientation the assessment of mineral content by XRD using polished sections may represent an advantage over traditional powder specimens. Comparison of data on mineral content and silica speciation with expansion data from PARTNER project confirmed that the presence of opal-CT plays an important role in the reactivity of one of the studied aggregates. Used as a complementary tool to RILEM AAR-1, the methodology suggested in this paper has the potential to improve the strength of the petrographic method.},
doi = {10.1016/J.CEMCONRES.2012.08.004},
journal = {Cement and Concrete Research},
number = 11,
volume = 42,
place = {United States},
year = {Thu Nov 15 00:00:00 EST 2012},
month = {Thu Nov 15 00:00:00 EST 2012}
}