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Title: ALKALI-CARBONATE REACTIVITY-AN ACADEMIC OR A PRACTICAL PROBLEM
Accession Number: 00233649
Record Type: Component
Abstract: THE OBJECTIVE OF THIS PROGRESS REPORT OF A STUDY BEING CONDUCTED IN MISSOURI IS TO PRESENT EVIDENCE INDICATING THAT ALKALI-CARBONATE REACTIVITY IS A PRACTICAL RATHER THAN AN ACADEMIC PROBLEM. EXTENSIVE EXPANSION AND CRACKING OF SOME CONCRETES HAVE BEEN ASSOCIATED WITH ALKALI-CARBONATE REACTIVITY. ALSO, PURSUANCE OF THIS STUDY HAS TURNED UP EVIDENCE OF ALKALI- SILICA REACTIVITY. RESULTS OF THE PRISM TEST ON MORE THAN 230 SAMPLES REVEAL THAT SOME ROCKS IN MISSOURI ARE SUFFICIENTLY REACTIVE TO CAUSE CONCERN. RESULTS OBTAINED DISCLOSE THAT THE CHEMICAL COMPOSITION OF REACTIVE ROCK MAY DIFFER APPRECIABLY FROM THE PREVIOUSLY SUGGESTED RANGES OF 40 TO 60 PERCENT DOLOMITE IN THE CARBONATE FRACTION, AND 10 TO 20 PERCENT ACID INSOLUBLE. NO RECOMMENDATIONS ARE MADE CONCERNING ACCEPTANCE OR USE OF REACTIVE ROCKS, BUT THE NEED FOR SUCH IS RECOGNIZED AND THE PROBLEM IS DISCUSSED. SUGGESTED CAUSES OF THE OBSERVED INCREASE IN OCCURRENCE AND PROGRESSION OF THE TYPE OF CRACKING IN CONCRETE ATTRIBUTED TO ALKALI-AGGREGATE REACTION ARE PRESENTED. /AUTHOR/
Supplemental Notes: Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
Monograph Title: Monograph Accession #: 01410012
Authors: Axon, E OLind, JuniorPagination: pp 114-125
Publication Date: 1964
Serial: Media Type: Print
Features: Figures
(8)
; References
(5)
; Tables
(2)
TRT Terms: Uncontrolled Terms: Geographic Terms: Old TRIS Terms: Subject Areas: Geotechnology; Highways
Files: TRIS, TRB
Created Date: Feb 9 1994 12:00AM
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