Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: AASHTO TP 142:2021
• Năm ban hành / Publication date: 2021
• Tình trạng / Status: A - Còn hiệu lực
• Tên tiếng Anh / Title in English: Standard Specification for Accelerated Determination of Potentially Deleterious Expansion of Concrete Cylinder Due to Alkali–Silica Reaction (Accelerated Concrete Cylinder Test, ACCT)
• Số trang / Page: 15

Phạm vi áp dụng / Scope of standard

This test method covers the determination of the susceptibility of an aggregate or combination of an aggregate with supplementary cementitious materials (SCMs) for participation in expansive alkali-silica reaction by measurement of length change of concrete cylinders.

This standard does not purpose 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. A specific precautionary statement is given in the section on reagents.

Note 1-The values stated in SI units are to be regarded as standard. The values in inch-pound units are shown in parentheses and are for informational purposes only.

The quality of the results produced by this standard are dependent on the competence of the personnel performing the procedure and the capability, calibration, and maintenance of the equipment used. Agencies that meet the criteria of R 18 are generally considered capable of competent and objective testing/sampling/inspection/etc. Users of this standard are cautioned that compliance with R 18 alone does not completely assure reliable results. Reliable results depend on many factors; following the suggestions of R 18 or some similar acceptable guideline provides a means of evaluating and controlling some of those factors.