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APPENDIX C <br /> LABORATORY METHODS AND RESULTS <br /> Laboratory tests were performed on representative soil samples to detect their relative engineering <br /> properties. Tests were performed following test methods of the American Society for Testing <br /> Materials or other accepted standards. The following presents a brief description of the various test <br /> methods used. The result of the laboratory tests is presented on the test boring logs or following <br /> this Appendix section. <br /> Natural Moisture Content <br /> The procedure of ASTM D2216 was used to measure the moisture content of representative <br /> samples. <br /> Classification <br /> Soils were classified visually according to the Unified Soil Classification System. Visual <br /> classifications were supplemented by laboratory testing of selected samples according to ASTM <br /> D2487. <br /> Atterber Limits <br /> imits <br /> The procedure of ASTM D4318 was used to measure the liquid limit, plastic limit and <br /> plasticity index of representative samples. <br /> Material Finer than No. 200 Sieve <br /> Particle-size analyses were performed on selected representative samples according to ASTM <br /> D 1140. <br /> R-Value <br /> The procedure of ASTM D2844 was performed to determine the potential strength of subgrade <br /> and base materials for use in road pavements. <br /> Expansion Index <br /> The ASTM D4829 procedure was used on selected samples to determine the expansion potential. <br /> Sieve Analysis <br /> The ASTM D6913 procedure was used to determine the particle size distribution of selected <br /> samples. <br /> cn�NC <br />