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CHAPTER THREE
PAVEMENT INVENTORY AND EVALUATION
The inventory of pavement infrastructure is the basic build- 2. Branch--a part of the network that serves a specific
ing block of an APMS. Because pavements deteriorate with purpose. Typical branches are runways, taxiways, aprons
time, the inventory includes past and current condition of or ramps, and airside pavements; for example, each
pavements and anticipates future condition. This chapter pro- airport runway is considered to be a branch.
vides a brief description of the main features of pavement 3. Section--a part of a branch that has a uniform pave-
inventory and procedures used for the assessment of pavement ment structure (and construction and maintenance
condition. Evaluation procedures are described for pave- history), traffic loads, and pavement condition. It is the
ment surface distresses, roughness, friction, and pavement basic repair unit.
deflection testing. With the exception of a few small airports, 4. Sample units--a part of a section created to carry
all airports surveyed carry out periodic pavement condition out pavement condition surveys based on the ASTM
surveys of runways using the Pavement Condition Index standard. The maximum size of the sampling unit for
(PCI), with an average survey frequency of 3.4 years. AC and PCC pavements is specified in the standard.
Data storage and retrieval is facilitated by APMS software
PAVEMENT INVENTORY such as MicroPAVER (2003). As a minimum, the pavement
inventory data for each section includes the following:
The documentation of pavement inventory is a prerequisite
for a systematic pavement condition evaluation and the selec-
· Section identification--functional class (branch) and
tion of M&R treatments on the network level. On the project
dimensions of the pavement section.
level, pavement inventory data are essential for the design of
· Location of the section--for example, within the branch,
M&R treatments. The inventory includes the size and main
keel, or outer wings.
characteristics of pavement assets and their condition. Prefer-
· Pavement structure--date of the original construction
ably, pavement inventory is viewed and organized as part of
and the description of pavement structure. The descrip-
an airport asset inventory. The U.S.DOT developed the Data
tion includes thickness and basic material properties of
Integration Primer (2001), which explains principles and
all layers, both the original layers and the subsequent
options for developing integrated asset management databases.
changes.
There is also the ASTM Standard E177-96, Standard Guide
· Subgrade and drainage characteristics--subgrade
for Prioritization of Data Needs for Pavement Management
type and the presence of subdrains and edge drains.
(ASTM 2002).
· Maintenance history--types and dates of subsequent
pavement M&R treatments, including the age of a current
A pavement inventory divides the airport pavement net- pavement surface.
work into homogeneous pavement sections with the same · Pavement condition data--includes past and current
pavement structure and a similar pavement condition through- data.
out. A pavement section is the basic building block for pave- · Traffic data--number of aircraft operations and type
ment inventory. It is also a basic unit for pavement preserva- of aircraft.
tion decision making. An M&R project can be carried out on
a single pavement section. In other words, a section is estab- Pavement inventory data are stored in an APMS database,
lished as a "repair unit"--a portion of the network that can be such as MicroPAVER, that has the capability to graphically
managed and repaired independently from other sections display archived data.
(Tighe and Covalt 2008).
The pavement network is typically divided into four lev- PAVEMENT EVALUATION PRINCIPLES
els according to specifications given in ASTM Standard D
5340 (2003) or in FAA Advisory Circular on Guidelines and APMS pavement evaluation includes field measurements of the
Procedures for Maintenance of Airport Pavements (2007): current state of pavement characteristics and recording them for
future use. It encompasses the evaluation of pavement surface
1. Network--represents the entire pavement infrastruc- distresses, roughness, friction, and pavement strength. The
ture managed by the airport authority. main principles of airport pavement evaluation include:
