IOWA STATE COMPACTION APPARATUS FOR MEASUREMENT OF SMALL SOIL SAMPLES

A METHOD HAS BEEN DEVELOPED FOR PREPARING SPECIMENS EITHER FOR USE IN EVALUATING ADDITIVES IN SOIL STABILIZATION STUDIES OR FOR CONTROLLING DENSITY IN FIELD CONSTRUCTION. THIS METHOD, IN USE AT IOWA STATE UNIVERSITY FOR SEVERAL YEARS, EMPLOYS SPECIMENS 2 IN. IN DIAMETER BY 2 IN. /APPROXIMATELY/ HIGH AND REQUIRES ONLY ABOUT ONE-TENTH THE MATERIAL AND ONE-THIRD THE TIME NEEDED FOR MAKING THE STANDARD AASHO-ASTM /OR PROCTOR/ SPECIMENS. THE DENSITY RESULTS OBTAINED WITH THIS APPARATUS VERY CLOSELY CORRELATE WITH THE RESULTS OBTAINED WITH THE STANDARD METHOD. THE RESULTS OBTAINED WITH 17 RAW SOILS AND 10 SOIL-CEMENT MIXTURES ARE PRESENTED. IN ADDITION, THE EFFECTS OF APPLIED COMPACTIVE ENERGY ON THE DENSITIES OF THE DIFFERENT TYPES OF SPECIMENS ARE GIVEN. /AUTHOR/