Title:
Re-Proportioning of Concrete Mixtures for
Air Entrainment
Author(s):
H. J. Gilkey
Publication:
Journal Proceedings
Volume:
54
Issue:
2
Appears on pages(s):
633-645
Keywords:
no keywords
DOI:
10.14359/11459
Date:
2/1/1958
Abstract:
FolloGing a summary of current knowledge of air entrainment, the problems of mixture re-proportioning are presented and illustrated with unit-block solid-volume diagrams. Range of mixtures, from rich to lean, is covered for a structural grade concrete of 3-m. slump and a nominal 4 percent of entrained air. Three specific approaches to the problem of re-proportioning are indicated and illustrated. Revised proportions of the three base mixtures, (rich, medium, and lean) are tabulated and graphed for each of the three tech-niques of adjustment employed. The objective is not only to cover visually and systematically the manipulatory aspects of air entrainment but also to refocus attention upon the unit-block, solid-volume concept as auseful technique and clarifying approach to the better comparative understanding of concrete mixtures in general.