Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: AASHTO PP 44:2001
• Năm ban hành / Publication date: 2001
• Tình trạng / Status: W - Hết hiệu lực
• Tên tiếng Anh / Title in English: Standard Practice for Quantifying Cracks in Asphalt Pavement Surface
• Số trang / Page: 5

Phạm vi áp dụng / Scope of standard

This practice covers the procedures for quantifying cracking in
asphalt pavement surfaces both in wheelpath and nonwheelpath areas.
Detailed specifications are not included for equipment or
instruments used to make the measurements. According to these
specifications, any equipment that can quantify, with the accuracy
stipulated herein, and which can be adequately validated, is
considered acceptable.

Note 1-Standardization will produce consistent
pavement condition estimates for network-level pavement management.
As an option, the user may define and collect other data, such as
edge cracking, centerline cracks, and transverse cracks. This
standard is designed for use primarily with automated equipment.
However, accommodations have been made for manual methods.

Either automated or manual data collection surveys as defined
below are acceptable.

Automated Surveys-Use a vehicle traveling at near
highway speeds and collect data on the entire length of roadway
(100 percent sample).

Manual Surveys-Observe distresses and record data on a
statistically reliable sample of the lane surveyed. The confidence
level in the results for each section should exceed 85 percent.
Rating continuous film or tape in an office setting is considered a
manual survey.

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