JIS A 1118:2017规定了用体积法测试新拌混凝土空气含量的方法。本标准适用于含有最大粒径不超过40 mm的粗骨料的混凝土。如果混凝土中含有最大粒径超过40mm的粗骨料，则最好采用湿筛法将骨料筛成40mm或更小的尺寸，并将其用于空气含量的测量和计算。

JIS A 1118:2017 specifies the method of test for air content of fresh concrete by volumetric method.This Standard is applicable to the concrete containing coarse aggregates each with a maximum size of not more than 40 mm. If concrete contains the coarse aggregates each with the maximum size exceeding 40 mm, it is preferable to screen the aggregates into 40 mm or less by the method of wet screening, and use them for measurement and calculation of the air content.