An Interesting Case of Dangerous Aggregate
J.C. Pearson and G.F. Loughlin
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In December, 1919, issue of CONCRETE an article describing rapid disintegration of a certain ornamental cast stone and stucco in the vicinity of Los Angeles, Calif., was published under the title, "A Costly Experiement with Feldspar Aggregate," by Robert B. Lammens. This article attracted considerable attention form the fact that it was interpreted as a warning against the use of feldspar aggregate, although only the lime-soda variety, plagioclase, was under construction.