Laserfiche WebLink
• waste was simulated by excluding the fraction of the sample which was larger than <br />#28 mesh and which floated in a fluid with a specific gravity of 1.60. The resulting <br />sample was processed by CT&E and delivered to CTUThompson, Inc. and used for <br />laboratory testing. <br />laboratory Testing <br />Samples obtained during the field investigation were returned to our <br />laboratory for testing which included: <br />o Moisture content and densky testing on drive samples from <br />exploratory borings. Specific gravity tests were performed on large <br />pieces of coal waste; <br />o Classification testing including Atterberg limits and gradation on native <br />soils, reclaimed spoil and coal waste; <br />• o Moisture-density relationships, falling head permeability and relative <br />density tests were performed on samples of both processed and <br />unprocessed coal waste; and <br />o Strength testing; including unconfined compression tests on native <br />cohesive soils, direct shear testing of processed and unprocessed <br />~ coal waste and a consolidated-undrained triaxial test with pore <br />pressure measurements on a sample of native clay. <br />The coal waste and spoil contained significant percentages of coarse gravel, <br /> <br />cobble and boulder-size particles which cannot be included in conventional test <br />samples. Direct shear tests were limited to particles smaller than 3/8 inches. To <br />simulate the full-sized sample, the test sample contained sufficient additional #4 <br />~ sieve to -3/8 sieve material to replace the larger material which could not be included <br /> <br />• <br />in the test. The gradations of the bulk samples and as-tested samples are shown on <br />4 <br /> <br />