Title:
Alkali Etching Tests on Concrete Aggregates
Author(s):
Willard H. Parsons and Herbert Insley
Publication:
Journal Proceedings
Volume:
40
Issue:
Appears on pages(s):
229-244
Keywords:
DOI:
10.14359/8658
Date:
1/1/1944
Abstract:
A test for determining the reactivity of an aggre- gate with high-alkali cements is described, which consists of microscopic examination of polished sur- faces of rocks and minerals after etching in various alkaline hydroxide and sulfate solutions. Pure opal, opaline chert and opaline limestone are readily etched, while volcanic glass, certain feldspars, chal- cedony, calcite, and dolomite are slightly etched under some of these test conditions. Photomicrographs of etched rocks and minerals are included.