Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: AASHTO T 21:2005
• Năm ban hành / Publication date: 2005
• Tình trạng / Status: W - Hết hiệu lực
• Tên tiếng việt / Title in Vietnamese: Standard Method of Test for Organic Impurities in Fine Aggregates for Concrete
• Tên tiếng anh / Title in English: Standard Method of Test for Organic Impurities in Fine Aggregates for Concrete

Thay thế bằng / Replaced by

AASHTO T 21M/T 21:2015

Lịch sử soát xét / History of version

• AASHTO T 21:2005 
• AASHTO T 21M/T 21:2015(W - Hết hiệu lực)
• AASHTO T 21M/T 21:2016(W - Hết hiệu lực)
• AASHTO T 21M/T 21:2020(A - Còn Hiệu lực)

• Số trang / Page: 4

Phạm vi áp dụng / Scope of standard

This test method covers two procedures for an approximate
determination of the presence of injurious organic compounds in
fine aggregates that are to be used in hydraulic cement mortar or
concrete. One procedure uses a standard color solution and the
other uses a glass color standard.

This standard may involve hazardous materials, operations,
and equipment. This standard does not purport to address all of the
safety concerns associated with its use. It is the responsibility
of the user of this standard to consult and establish appropriate
safety and health practices and determine the applicability of
regulatory limitations prior to use.