Title:
Comparison of Methods of Determining Moisture in Sands
Author(s):
William R. Johnson
Publication:
Journal Proceedings
Volume:
25
Issue:
2
Appears on pages(s):
261-270
Keywords:
none
DOI:
10.14359/15344
Date:
2/1/1929
Abstract:
In applying the water-cement ratio method of proportioning concrete to actual job conditions there is need for a quick, accurate method of determining the moisture content in the sand. A number of methods are now being used with more or less success. The basic principle of these methods, however, vary considerably. They include drying to a constant weight, measurement of the displacement in a liquid, the change in electrical resistance due to moisture, and the change in specific gravity of a testing liquid. All of these methods are not equally satisfactory. Some of them are not accurate, others either require too many operations and take too long to complete, or require too much apparatus for greatest usefulness under field conditions. This investigation was undertaken with a view to studying the advantages and disadvantages of some of these methods.