Laserfiche WebLink
File No. 20-1008-49.001 K L E I N F E L D E R - <br /> July 8, 1993 <br /> On April 26, 1993, haul trucks (each carrying a 26.02-ton load) delivered Ione clay to the test <br /> pad. Truck weights were verified by weight master tickets. Two loads, or 52.04 tons, of lone <br /> clay were placed on the ML test pad and two loads on the SM test pad; four loads, or 104.08 <br /> tons, were placed on the SP/SM test pad. A blade spread the clay to a fairly uniform thickness <br /> on the test pad. The clay spreading effectiveness was verified at random locations by <br /> measuring clay thickness. <br /> Premixing of the Ione clay and the upper soil was performed by a CAT RR250(large rototiller) <br /> with the mixing drive in third gear and the mixing bar rotating at 160 revolutions per minute. <br /> Two passes at an 8-inch depth were made which appeared to break up the larger clods well. <br /> Final mixing involved two passes to achieve the required specifications. One final pass was <br /> made to add water to the soil by utilizing a spray bar attached to the mixer. Samples of the <br /> test pad materials were then acquired for compaction curves, Atterberg Limits, gradations, and <br /> hydrometer analysis. Results of the Atterberg Limits and test pad soil composition are <br /> summarized in the table below. <br /> Hydrometer <br /> Test Analysis Percent Plasticity Liquid <br /> Pad Sand Silt Clay Index Limit <br /> ML 36 42 22 11 27 <br /> SP/SM 64 22 14 11 24 <br /> SM 64 18 18 t 3 23 <br /> Loose thickness of the mixed material was measured at several locations on the test pad with <br /> the average loose thickness as follows: <br /> Average Loose Thickness <br /> Test Pad (inches) <br /> ML 21 <br /> SP/SM 19 <br /> SM 20 <br /> A CAT 8250 sheepsfoot compactor was utilized to compact test pad soils. Approximately ten <br /> passes with the compactor were required to achieve a minimum relative compaction of 95 <br /> percent. <br /> Copyright 1993 Kleinfelder, Inc. Page 3 of 7 <br />