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Study to develop reliable means for predicting potential expansion characteristics of clays from classification test data is described; it is shown that well-defined relationship can be established between percentage of clay sizes present in soil, activity of clay, and percentage of swell under 1-psi surcharge of sample compacted at optimum water content to maximum density in Standard AASHO Compaction Test; charts developed from data.
Seed et al. (Fri,) studied this question.