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Rods Sbength and Physics!Agmrbes-HCW1-15,HCM-14 HCO03-14 <br /> W-004-14 HC005-15,HC00615,and HOW7-15 <br /> Page 2 <br /> controlled 200,000-pound capacity load frame. Details concerning the test procedure <br /> and methodology are presented in the following sections. <br /> III. Laboratory Testing of Specimens <br /> 3.1 Sample Preparation <br /> Upon completion of the initial phases of photographing, measuring, and marking <br /> the core, the specimens were labeled, pulled from the boxes, wrapped in duct tape, and <br /> placed in plastic bags. The uniaxial specimens were trimmed with a diamond cut-off <br /> saw. The uniaxial specimens were cut with a length to diameter (IJD) ratio of between <br /> 2.04 and 2.44. <br /> This specimen geometry satisfies ASTM (ASTM D 4543-04) specifications. The <br /> uniaxial specimens were placed in a V-block that is magnetically attached to the bed of <br /> a surface grinder. The specimen ends were ground flat to within 0.001 inch in steps of <br /> 0.005 inch, 0.003 inch, 0.001 inch. ASTM (ASTM D 4543-04) recommends that the <br /> specimens be flat within 0.001 inch and that the specimens be perpendicular to within <br /> 0.250 or 1 part in 230 or 0.0043. If the specimen falls within the flatness specification of <br /> 0.001 inch, then the perpendicularity requirement is satisfied by default since: <br /> 0.001 in. = 0.00025 <br /> 4.000 in. <br /> The value of 4.000 inches was selected since the specimens have lengths greater than <br /> 4.000 inches. <br /> 3.2 Testing Procedures <br /> The uniaxial compressive strength specimens were tested using a SATEC, <br /> closed loop, hydraulically driven testing frame. The frame has a 200,000-pound <br /> capacity and is externally controlled by a computer that is also used for data acquisition. <br /> The tests were run in load control where a prescribed loading rate is entered into the <br /> computer and the SATEC machine loads the specimen at a constant rate through <br /> ultimate failure. A pressure transducer that is incorporated into the hydraulic cylinder of <br /> the testing frame measures specimen load. All test data are backed up daily to an <br /> external hard drive for permanent data storage. The specimen load, cumulative test <br /> time, and the position of the lower platen were automatically recorded on the computer's <br /> hand drive. <br />