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.
DOI:
10.14359/7362
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.