AASHTO PP 89-19（2020）描述了将圆柱形混凝土试样端部打磨至平面的过程，以便使用AASHTO T 22、ASTM C39/C39M或允许在抗压强度测试之前将圆柱形混凝土试样端部打磨至平面的任何其他标准对其进行抗压强度测试。这种做法仅限于自动或半自动机械湿磨工艺，可以以一致的方式研磨圆柱形混凝土试样。

This practice describes the process of grinding the ends of cylindrical concrete specimens to a planar surface in order for them to be tested for compressive strength using AASHTO T 22M/T 22, ASTM C39/C39M, or any other standard that permits grinding the ends of cylindrical concrete specimens to a planar surface prior to testing for compressive strength.This practice is limited to automated or semi-automated mechanical wet-grinding processes that can accommodate the grinding of cylindrical concrete specimens in a consistent manner.The values stated in SI units or inch-pound units are to be regarded separately as the standard. Within the text, the inch-pound units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.