คอนกรีตและวัสดุก่อสร้าง
เอกสารมาตรฐาน
สหรัฐอเมริกา
AASHTO
R 90-18
Sampling Aggregate Products
2018 (2021)
5
HM41-1 (2021)
This practice covers the procedures for obtaining representative samples of coarse, fine, or combinations of coarse and fine aggregate (CA and FA) products to determine compliance with requirements of the specifications under which the aggregate is furnished. The method includes sampling from conveyor belts, transport units, roadways, and stockpiles.