Upper compression platen and spherical seat for tests on cylinder specimens dia. 100x200, 150x300, 160x320 mm and 4”x 8”, 6”x 12” to fix on the testing machine, in replacement of the standard platen +seat to obtain an increased vertical clearance of the testing chamber and to meet the ASTM C39, C1231 and AASHTO T22, T851 Specifications.
