Investigation of a Reaction Involving Nondolomitic Limestone Aggregate in Concrete

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Title: Investigation of a Reaction Involving Nondolomitic Limestone Aggregate in Concrete

Author(s): Alan D. Buck and W. L. Dolch

Publication: Journal Proceedings

Volume: 63

Issue: 7

Appears on pages(s): 755-766

Keywords: aggregate, alkali-carbonate reaction, limestone, chemical reaction, nondolomitic limestone, petrography, research, x-ray analysis.

Date: 7/1/1966

Abstract:
A laboratory investigation was made of a chemical reaction observed as rims on nondolomitic limestone coarse aggregate particles in field concrete. The rims were characterized by a color variation and an increased solubility in acid. Seventeen limestones from 11 sources were used. The reaction was developed in three of the rocks in laboratory test specimens; x-ray diffraction analysis led to a tentative explanation. It was concluded that this reaction could occur with all carbonate rocks in concrete and could contributed to aggregate-paste bond.