Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: AASHTO T 23:2018
• Năm ban hành / Publication date: 2018
• Tình trạng / Status: A - Còn hiệu lực
• Tên tiếng Anh / Title in English: Standard Method of Test for Making and Curing Concrete Test Specimens in the Field
• Thay thế cho / Replace: AASHTO T 23:2017
• Số trang / Page: 11

Phạm vi áp dụng / Scope of standard

This method covers procedures for making and curing cylinder and beam specimens from representative samples of fresh concrete for a construction project.

The concrete used to make the molded specimens shall be sampled after all on-site adjustments have been made to the mixture proportions, including the addition of mix water and admixtures. This practice is not satisfactory for making specimens from concrete not having measurable slump or requiring other sizes or shapes of specimens.

The values stated in SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Warning-Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to exposed skin and tissue upon prolonged exposure.

The text of this standard references notes that provide explanatory material. These notes shall not be considered as requirements of the standard.