3900 S Bristol St - Soils Report

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Page A-2 LEROY CRANDALL AND ASSOCIATES complete data. The yield-point values determined from the direct shear tests are presented on Plate C, Direct Shear Test Data. Confined consolidation tests were performed onÂ·11 undisturbed samples to determine the compressibility of the soils. Water was added to 4 of the samples during the tests to illustrate the effect of moisture on the compressi- bility. The results of the consolidation tests are presented on Plates D-1 through D-6, Consolidation Test Data. The optimum moisture content and maximum dry density of the upper soils were determined by performing compaction tests on samples obtained from Borings 13 and 18. The tests were performed in accordance with the ASTM Desig- nation D 1557-70 methqd of compaction modified to use three layers. After completion of the compaction tests, California Bearing Ratio tests were per- formed on the samples in accordance with the ASTM Designation D 1883-67 method. The results of the compaction and California Bearing Ratio tests are presented on Plate E, Compaction and C.B.R. Test Data. Expansion tests were performed on four undisturbed samples of the clay soils to determine the volume changes of the soils due to changes in the mois- ture content. The samples were confined under a nominal surcharge pressure, soaked, and the resulting expansion was-measured.Next, the samples were al- lowed to air-dry, and the resulting shrinkage was measured. The results of the expansion tests on the undisturbed samples are presented on Plate F-1, Ex- pansion Test Data.In addition, the expansion index of the soils was determined by performing tests on three remolded samples in accordance with the tentative method proposed by the Expansive Soils Committee of the Los Angeles Section of The results of these tests are shown on Plate F-2, Expansion IndexA.S.C.E Test Data. -000-