Title:
Proposed Revisions to ACI Standard: Recommended Practice for Selecting
Proportions for Normal and Heavyweight Concrete
(ACI 211 .l-77)
Author(s):
ACI Committee 211
Publication:
Concrete International
Volume:
2
Issue:
12
Appears on pages(s):
67-70
Keywords:
absorption; aggregates; air-entrained con-cretes;
air entrainment; cement content; coarse ag-gregates;
concrete durability; concretes; consistency;
durability; exposure; fine aggregates;
DOI:
Date:
12/1/1980
Abstract:
Describes, with examples, two methods for selecting and adjusting proportions for normal weight concrete. One method is based on an estimated weight of the concrete per unit volume; the other is based on calculations of the absolute volume occupied by the concrete ingredients. The procedures take into con-sideration the requirements for placeability, consistency, strength, and durability. Example calculations are shown for both methods, including adjust-ments based on the characteristics of the first trial batch. The proportioning of heavyweight concrete for such purposes as radiation shielding and bridge counterweight structures is described in an appendix. This appendix uses the absolute volume method which is generally accepted and is more convenient for heavyweight concrete.