คอนกรีตและวัสดุก่อสร้าง
เอกสารมาตรฐาน
สหรัฐอเมริกา
AASHTO
R 76-16 (2020)
Reducing Samples of Aggregate to Testing Size
2020 (2021)
7
HM41-1 (2021)
These methods cover the reduction of large samples of aggregate to the appropriate size for testing employing techniques that are intended to minimize variations in measured characteristics between the test samples so selected and the large sample. This standard was formerly designated as test method T 248.