Laserfiche WebLink
<br /> B-2 <br /> <br />the No. 40 sieve. Results of the Atterberg limits tests are shown graphically and presented in <br />this Appendix. <br /> <br />Direct Shear <br />Direct shear tests were performed on undisturbed samples of on-site soils. A different normal <br />stress was applied vertically to each soil sample ring which was then sheared in a horizontal <br />direction. The resulting shear strength for the corresponding normal stress was measured at a <br />maximum constant rate of strain of 0.005 inches per minute. The direct shear results are shown <br />graphically on a laboratory data sheet included in this appendix. <br /> <br />Corrosion Potential <br />Corrosion was tested on the selected soil sample in the near surface to determine the corrosivity <br />of the site soil to steel and concrete. The soil samples were tested for soluble sulfate (Caltrans <br />417), soluble chloride (Caltrans 422), and pH and minimum resistivity (Caltrans 643). The <br />results of corrosion tests are summarized in Table B-1. <br />TABLE B-1 (Corrosion Test Results) <br />Boring <br />No. <br /> <br />Depth <br />(ft) <br />Chloride <br />Content <br />(Calif. 422) <br />ppm <br />Sulfate Content <br />(Calif. 417) <br />% by Weight <br />pH <br />(Calif. 643) <br />Resistivity <br />(Calif. 643) <br />Ohm*cm <br />B-1 <br /> <br />0-2 121 0.0169 7.6 1,078 <br />