ACI Standard Recommended Practice for Selecting Proportions for Structural Lightweight Concrete (ACI 211.2-69)

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Title: ACI Standard Recommended Practice for Selecting Proportions for Structural Lightweight Concrete (ACI 211.2-69)

Author(s): ACI Committee 211

Publication: Journal Proceedings

Volume: 66

Issue: 5

Appears on pages(s): 365

Keywords: absorption; aggregate gradation; air content; air entrainment; calibration; cement content;coarse aggregates; fine aggregates; fineness modulus; lightweight aggregate concretes; lightweight aggregates;mix proportioning; moisture;sampling;slump tests.

Date: 5/1/1969

Abstract:
Describes, with examples, a method for proportioning and adjusting structural grade concrete containing lightweight aggregates. The method described uses a "specific gravity factor," determined by pycnometer test on the aggregates, which accounts for variations in moisture content of the aggregates. A tabular form is suggested for systematic calculation of batch weights and "effective displaced volumes." Examples are given for adjustments for change in aggregate moisture content, aggregate proportions, cement factor, slump, and air content.