Chemical Compaction Aids for Fine-Grained Soils: Vol. II
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1978-06-01
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Edition:Final Report - Vol. II
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Abstract:This paper includes moisture-density-strength screening tests performed on several additional chemicals and an evaluation of the standard AASHTO T-99 moisture-density tests results performed on soil specimens prepared under varying conditions of drying, pulverization, and re-use. Theory and applicability of project use of the Iowa K-Test for determination of cohesion, angle of internal friction, lateral stress ratio, and other soil parameters obtained from 1/30 cu ft specimens are described. Also presented are the Phase II laboratory moisture-density strength study of chemicals selected primarily from Phase I as evaluated through both qualitative and statistically related procedures, laboratory compaction growth, and 7-day moist cure results, and a discussion of the mechanisms of chemical compaction aids as evaluated through the assistance of infrared spectrography, vapor pressure osmometer, and zeta potential tests. Based on the total study, an "ideal" compaction aid is described. Phase III presents results of field trials conducted on a roadway embankment near Knoxville, Marion County, Iowa, and a soil-aggregate base near Villanueva, New Mexico.
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