คอนกรีตและวัสดุก่อสร้าง
เอกสารมาตรฐาน
สหรัฐอเมริกา
AASHTO
M 195-22
Lightweight Aggregates for Structural Concrete
2022
7
HM42-2022 part 1
This specification covers lightweight aggregates intended for use in structural concrete in which the prime considerations are reducing the density while maintaining compressive strength of the concrete. Procedures covered in this specification are not intended for job control of concrete.