Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: AASHTO T 292:1997
• Năm ban hành / Publication date: 1997
• Tình trạng / Status: W - Hết hiệu lực
• Tên tiếng Anh / Title in English: Standard Method of Test for Resilient Modulus of Subgrade Soils and Untreated Base/Subbase Materials
• Thay thế cho / Replace: AASHTO T292:1991
• Số trang / Page: 27

Phạm vi áp dụng / Scope of standard

This method covers procedures for preparing and testing
untreated subgrade soils and untreated basdsubbase materials for
determination of resilient modulus (M,)under conditions
representing a simulation of the physical conditions and stress
states of materials beneath flexible pavements subjected to moving
wheel loads.

The methods described are applicable to undisturbed samples of
natural and compacted subgrade soils and to disturbed samples of
subgrade soils and untreated base/subbase materials prepared for
testing by compaction in the laboratory. Methods of compaction
include kneading, impact, static and vibratory.

The values of resilient modulus determined with these procedures
can be used to calculate the physical response of pavement
structures.

Note 1-Test specimens and equipment described
in this method may be used to obtain other useful and related
information such as the Poisson's ratio and rutting characteristics
of subgrade soils and base/subbase materials. Procedures for
obtaining any such optional information are, however, beyond the
scope of this method.

The values stated in SI units are to be regarded as the
standard.