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Our Job 81-20-00 Page A- 6 <br />apparatus. The normal stress was reapplied; the sample was sub- <br />merged and allowed to stabilize for one hour prior to shearing. <br />The normal stress is applied through a loading frane. The sanple <br />is sheared at a rate of 0.005 inches per ninute. The normal force <br />and shearing force are measured by means of electric load ce11s. <br />Horizontal displacement and vertical morrement of the sample are <br />monitored by LVDTs. Shear force, normal force, and vertical move- <br />ment of the sample are all automatically plotted versus displace- <br />ment on'an X-Y recorder. Test results are presented on Plate A-5 <br />Shear Test Data. <br />A11 samples exhibited a reduction in thickness, as <br />measured by the vertical- strain indicator, with increasing shearing <br />s train. <br />Expansion Tests. The one-dinensional expansion of a <br />remolded sample of the on-site surficial fill material was evaluated. <br />To provide a standard definition of one-dimensional expansion, the <br />test was performed according to the Expansion Index Test referred <br />to as Standard Test 29-2 of the Uniform Building Code, fnternational <br />Conference of Building Officials. The results from this test pro- <br />cedure are reported as an "expansion index". <br />The procedure basically consists of performing a loailed <br />swe1l test on a sample one inch high and four inches in diameter, <br />renolded to a density equivalent to a compactive energy of about <br />10,300 foot-pounds per cubic foot, at a nrcisture content equivalent <br />to percent saturation not less than 49 nor more than 51.