Title: The Absolute Basis of Proportioning Concrete and Its Economy

Author(s): Joseph A. Kitts

Publication: Journal Proceedings

Volume: 25

Issue: 2

Appears on pages(s): 741-750

Keywords: none

DOI: 10.14359/15361

Date: 2/1/1929

Abstract:
Aggregates from the same source vary widely from day to day in average diameter of particles, gradation of sizes of particles, moisture content, absorption, density, specific gravity, and bulking by loose measurement and moisture. The absolute' volumes and gradation of sizes of particles in a mix, the water required for workability and the cement required for the strength, or other properties of the concrete, are changed by these variations of the physical characteristics of the aggregates. Fixed volumetric or weight proportions of mix may have excellent workability and quality producing characteristics one day and quite the contrary the next because of these variations in the physical characteristics of the aggregates.