here you go, this is a really tough one.
This assessment manual prepared to aid the process of renewing existing pavements to achieve long
live of the pavement. To achieve this goal, a systematic collection data is gathered, from distress
survey to information on life cycle assessment, and this manual organized the data to maximize the
usefulness in pavement decision making process. The use of the manual is to compliment and
provide all the information regarding the renewal strategies considered in the SHRP R23 project. The
types of data critical for making pavement-related decisions along with analysis for organizing the
decision making. There are 10 categories and each of the category contained by (1) the purpose for
collecting data, (2) applicable standard, definition and data organization recommendations, and (3)
Pavement distress surveys
Pavement rut depths and roughness
Nondestructive Testing—Falling Weight Deflectometer
Ground Penetrating Radar
Dynamic Cone Penetrometer
Subgrade soil sampling and tests
Traffic Loads for Design
Life cycle assessment
The overall assesment scheme in this manual to renew the existing pavements are:
1. Identify Pavement Type for Existing Pavement Structure
2. Identify Distress Categories
3. Collect other pavement related data and conduct analyses
4. Select Renewal Pavement Type
5. Apply Recommended Renewal Actions and Design
The first 3 point addressed with that information being applied to the process in the process 4 and
5 The types of input data include the distress types associated with the existing pavement
structure, characterization of future traffic, subgrade characterization and more.
This section discusses the uses of a pavement distress survey to aid pavement assessment decision
using ASTM D6433-07 Standard Practice for Roads and Parking Lots Pavement Condition Index
Surveys measurement. This data is used for (1) establish pavement reconstruction, rehabilitation,
and maintenance priorities, (2) determine rehabilitation and maintenance strategies, and (3)
predict pavement performance.
McCullough (1971) provided a detailed description of three basic pavement distress survey
schemes. A subset of fracture including cracking and ...