This thesis reports the results of an investigation of the variation in plasticity of a clayey soil after treatment with small quantities of epoxy resin and curing agent or with curing agent alone. The series of samples tested consisted of an A-6 soil obtained from the vicinity of Rolla, Missouri, combined with: 1. 0-3% of triethylenetetramine hereafter referred to as TETA. 2. 0-3% of diethylenetriamine hereafter referred to as DETA. 3. 0-3% of Araldite 6010 resin cured with TETA. The TETA content was varied form 20% to 100% of the resin by weight. 4. 0-3% Araldite 6010 resin cured with DETA. The DETA content was varied from 20% to 100% of the resin by weight. The plasticity index of the treated soil samples was computed by conventional soil testing procedures. The relative amount of unreacted amine remaining in samples was determined by titration. Qualitative relationships were found between the plasticity index and the type and quantity of additive used. The complexities of these relationships are discussed and suggestions for further research are made --Abstract, page ii
