Effect of Entrained Air on Concrete Made with So-Called "Sand-Gravel" Aggregates

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Title: Effect of Entrained Air on Concrete Made with So-Called "Sand-Gravel" Aggregates

Author(s): Paul Klieger

Publication: Journal Proceedings

Volume: 45

Issue: 10

Appears on pages(s): 149-163

Keywords: no keywords

Date: 10/1/1948

Abstract:
Snad-gravel aggregates (maximum particle size 3/8 in.) used with non-air-entraining cement produce concretes containing from 3 to 4 percent air. The same mixes made with air-entraining cement and the sand-gravel aggregates have air contents from 8 to 13 percent. Effect of this larger amount of entrained air is given in terms of tests of flexural and compressive strength, freezing and thawing resistance, and length changes in varying storage conditions. Effect of "sweetening" the sand-gravel by addition of 30 percent of coarser aggregate is noted.