Laserfiche WebLink
e <br />In -Situ Moisture and Density (ASIM'D2216): In-situ•moisture and density are calculated by <br />weighing and measuring the drive samples obtained - from- the borings• to determine their in- <br />place moisture and density. These results are used to analyze the consistency of the subsoils. <br />Maximum Dry Density and Optimum Moisture Content (ASTM D1557): This test is used to <br />evaluate the relationship of maximum dry density and moisture content under an applied <br />compactive energy of 56,250 ft. ibJf . The data is used to compare in-situ characteristics <br />with "optimum conditions," evaluate methods for improving bearing capacity and to control <br />grading operations. <br />• R -Value: - The R Value test is used to evaluate the quality of soils and aggregate base material <br />for use as base, sub -base and subgrade in structure pavement design. <br />• Atterburg_Limits ASTM D-4318): The liquid limit, plastic limit and plastic index were <br />determined as an aid in the classification of the soil and to correlate with empirical <br />relationships for material properties. <br />Expansion index (ASTM D-4829): This test provides an index to the expansion potential of <br />soils when inundated with water. <br />• Consolidation (ASTM D-2435): Consolidation tests were conducted to determine the <br />settlement characteristics of the soil at various normal loads. Water was added at some point <br />during the test to determine the effect of increased moisture. <br />In addition, the concentration of soluble sulfates in the near -surface soil was determined by <br />E.S. Babcock and Sons, Inc., Riverside, California. <br />The laboratory results of all laboratory tests are presented in Appendix B. <br />7N 40007.095-01 <br />1hgInaw%97-06jum\a-n-.doc <br />3-2 <br />