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5.2 Gyratory Compactor--Hydraulic compactor with ram and ram heads (see<br />
section 5.4) that are restrained from revolving during compaction. The axis of the ram shall<br />
be perpendicular to the platen of the compactor. The ram must maintain a pressure of 0.60<br />
_+0.01 MPa over 100- and 150-mm diameter specimen cross sections.<br />
NOTE 1.--This<br />
stress calculates to 4,710 ± 80 N and 10,600 ± 180 N total force.<br />
The compactor must tilt and gyrate the mold at an angle of 21.8 + 0.3 mrad<br />
(1.25 + 0.02 °) throughout compaction. The mold must be free to revolve on its tilted axis<br />
during gyration. Captive inside the mold is a mold bottom (see section 5.4) that is not<br />
attached in any way and shall be free to rotate on the lubricated platen of the compactor.<br />
Means shall be provided to continuously measure and digitally display the height of the<br />
specimen in mm during compaction and to transmit the height via an RS232C serial<br />
connection to the computer (see section 5.5) once per gyration. The speed of gyration shall<br />
be 30.0 + 0.5 gyrations per minute.<br />
5.3 Molds--Each mold shall be a minimum of 8.5-mm-thick steel hardened to at<br />
least Rockwell C48. Inside finishes shall have a root mean square (rms) of 16 or smoother.<br />
The dimension of the molds shall be:<br />
5.3.1 an inside diameter of 99.95 to 100.00 mm and a minimum of 160 mm (6.3<br />
in.) high; 0.05 mm wear allowed;<br />
5.3.2 an inside diameter of 149.95 to 150.00 mm and a minimum of 225 mm high;<br />
0.05 mm wear allowed.<br />
5.4 Ram Heads and Mold Bottoms--All shall be steel hardened to at least Rockwell<br />
C48. The ram heads shall have means for staying fixed to the ram and being perpendicular to<br />
its axis. The platen side of each mold bottom shall be flat and parallel to its face. All faces<br />
(the sides presented to the specimen) shall be ground fiat and have one of the following<br />
diameters:<br />
5.4.1 99.70 to 99.75 mm; 0.05 mm wear allowed;<br />
5.4.2 149.70 to 149.75 mm; 0.05 mm wear allowed.<br />
port<br />
5.5 Computer--IBM-compatible, with hard drive, diskette drive and RS232C serial<br />
5.6 Software--Capable of establishing specimen header information; receiving and<br />
recording height of specimen data once per gyration; and subsequently adding and editing<br />
header information in each specimen record with the following fields:<br />
5.6.1 Project name;<br />
5.6.2 Date of test;<br />
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