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Title: Correlation of soil properties with geologic information, report no. 1 : Simplification of the liquid limit test procedure
Authors: United States. Mississippi River Commission.
U.S. Army Engineer Waterways Experiment Station.
Keywords: Soil mechanics
Soil properties
Soil classification
Liquid limit tests
Publisher: U.S. Army Engineer Waterways Experiment Station.
Engineer Research and Development Center (U.S.)
Description: Technical Memorandum
Introduction: The general project of correlating soil properties with geologic information, one phase of which is described in this report, consists in comparing soil properties with soil types and with their geologic history and environment in order to determine what correlations are possible. If correlations are found to exist, it would be possible to reduce laboratory testing materially at sites where geologic information is available, and to obtain a better understanding of the behavior and properties of the soils. The purpose of this report is to present data and analyses from liquid limit tests, and correlations which may materially reduce the cost of performing this test. Dr. Arthur Casagrande suggested that flow lines determined by liquid limit tests, plotting both water content and number of blows to a logarithmic scale, might have a constant slope for soils of the same geologic origin. The basis for the idea that a logerithmic plot would give a constant flow-line slope, which the currently-used semilogarithmic plot does not, is as follows: On a semilogarithmic plot, flow lines of higher liquid limit values have, in general, steeper slopes than flow lines of lower liquid limit values. However, a logarithmic plot reduces the slope of the higher liquid limit flow lines more than it does the lower, thus tending to make them equal as is clearly illustrated by figure 1 (NOTE: see actual report of report for figure). It was apparent that this suggested procedure had practical possibilities that could be explored rather rapidly. Since the liquid limit test is a desirable but costly type of classification test, it was decided to determine the feasibility of using the liquid limit test procedure simplification suggested by Dr. Casagrande. This report describes the results of analyses of 767 liquid limit tests. The tests were performed by the New Orleans, Vicksburg and Memphis Districts, and the Waterways Experiment Station, CE, in connection with various projects under the jurisdiction of the Mississippi River Commission and the Lower Mississippi Valley Division.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Technical Memorandum

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