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Figure 13-11A.Front of data sheet (DD Form 1212) for California bearing ratio test. - 14071_281
Figure 13-12.Adjusting the zero point of the curve. - 14071_283

Engineering Aid 2 - Intermediate Structural engineering guide book
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Figure  13-11B.—Stress-penetration  curves  (reverse  of  CBR  test  data  sheet  DD  Form  1212). The  5,000-pound  proving  ring  was  used  for  which starting at 0.025 inch and increasing to 0.500 inch. The the  proving-ring  constant  was  12  pounds  for  every second column lists standard unit loads. The test was 0.0001 read on the proving-ring dial; for example,when carried out by cranking the jack until the penetration dial the  proving-ring  dial  reads  0.0111,  the  force  being reaches the standard penetration, then reading the load exerted by the piston is 12 x 111, or 1,332 pounds. for that penetration on the proving-ring dial. Notice that see In the penetration data portion of the data sheet, you for each dial reading there is a corrected dial reading that that the first column lists standard penetrations is 0.003 inch less that the uncorrected reading. This 13-14







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