Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: AASHTO HM-2019 PT 1:2019
• Năm ban hành / Publication date: 2019
• Tình trạng / Status: A - Còn hiệu lực
• Tên tiếng Anh / Title in English: Standard specifications for transportation materials and Methods of sampling and testing and provisional standards
• Số trang / Page: 2

Phạm vi áp dụng / Scope of standard

INTRODUCTION TO MATERIALS STANDARDS

Overall Organization, Release Schedule, and Subject Areas

This 2019 Edition of Transportation Materials is divided into three parts. Part 1 contains specifications and practices for materials; Part 2 includes methods of testing and specifications for testing equipment, many of which contain both U.S. Customary and Metric units of measure; and Part 3 contains provisional standards. A number of specifications were included in this publication at the request of the AASHTO Subcommittee on Bridges and Structures.

Updates are released annually in three groups, broken up by subject area. Summaries of changes and revision charts are provided for each release for Part 1, Part 2, and Part 3. When a standard is revised or reconfirmed, the release number will appear, with month and year in parentheses, beneath the designation number. Releases 1 through 3 occur in April, June, and July, respectively, covering the following subjects:

• Release 1-Hydraulic Cement and Lime; Fresh Concrete; Hardened Concrete; Pavement Measurement; Bridge and Pavement Preservation; and Quality Assurance and Environmental.

• Release 2-General Manufactured Materials.

• Release 3-Geotechnical; and Bituminous Materials and Mixtures.