Download - PAVEMENT MAINTENANCE 1:
PAVEMENT MAINTENANCE 1:Part 1: Pavement Preservation
IdahoRoads Scholar Program
Learning Objectives
Become familiar with terminology Distinguish between preventive
and reactive repairs Understand basic pavement
management concepts Monitoring pavement condition Pavement life cycle
Issues What is pavement preservation? What is preventive maintenance? What is corrective maintenance? When should these actions be taken? Are these activities effective? If so, then why doesn’t everyone have a
pavement preservation program?
Definitions
Preventive Maintenance Corrective Maintenance Pavement Preservation Pavement Rehabilitation
Preventive Maintenance
The planned strategy of cost effective treatments to an existing roadway system and its appurtenances that preserves the system, retards future deterioration, and maintains or improves the functional condition of the system (without increasing structural capacity).
- AASHTO’s Standing Committee on Highways
Preventive Maintenance
Planned Performed on good
pavements Contributes to long-
term performance Examples: Fog Seal,
Chip Seal, Thin HMA Overlay
Corrective Maintenance
Reactive Performed on failing
pavements Does not contribute to
long-term performance Examples: Patching,
Pothole Repair
Pavement Preservation
The sum of all activities undertaken to provide and maintain serviceable roadways; this includes corrective maintenance and preventive maintenance, as well as minor rehabilitation projects
- National Highway Institute
Pavement Preservation
Pavement Preservation
PreventiveMaintenance
CorrectiveMaintenance =+
Pavement Rehabilitation
Work undertaken to extend the service life of an existing pavement. This includes the restoration, placing an overlay, and/or other work required to return an existing roadway to a condition of structural and functional adequacy.
- National Highway Institute
Candidate for…?
Candidate for…?
Candidate for…?
Types of Maintenance Activities
SometimesNoGenerallyCorrective
YesYesYesPreventive
Probably NotNoNoReactive (Demand)
SometimesNot NecessarilyYesRoutine
Extends Facility Life?
Before Deterioration?Planned?Type
Pavement Management Concepts Pavement Life Cycle Pavement Condition Pavement Condition Index (PCI) Pavement Serviceability Index
(PSI) Critical “PCI”
Time or Traffic
Pa
vem
ent
Co
nd
itio
nPavement Lifecycle
Pavement Condition
Pavement Condition can be rated using any number rating systems, including: Pavement Condition Index (PCI)
PCI = 100 is New/Excellent and PCI = 0 is Failed
Present Serviceablity Index (PSI) PSI = 5 is New and PSI = 0 is Failed Used in the AASHTO Design Methodology
International Roughness Index (IRI) Rating is Inches/Mile and is automatically recorded
100
85
70
55
40
25
10
0
Excellent
Very Good
Good
Fair
Poor
Very Poor
Failed
Pavement Condition Index
Corps of Engineers Develop for Airfields
ASTM now has standards for both highways and airfields
Analyze Distresses Type Severity Density
Pavement Condition Index
Example: Distress Type:
Weathering/Raveling Distress Severity:
Moderate Distress Density: 100% of
Surface PCI Deduct Value: 12pts Pavement Condition
Index: 88
Time or Traffic
Pa
vem
ent
Co
nd
itio
n In
dex10
0
0
PCI = 88
Pavement Condition
Time or Traffic
Pa
vem
ent
Co
nd
itio
n In
dex10
0
0
Critical PCI = 65 - 70
Pavement Condition
Time or Traffic
Pa
vem
ent
Co
nd
itio
n In
dex10
0
0
Preventive Maintenance
Corrective Maint, Rehabilitation, or Reconstruction
Critical PCI
Critical PCI
Time or Traffic
Pa
vem
ent
Co
nd
itio
n
PreventiveMaintenance
Preventive Maintenance
CorrectiveMaintenance/Repair
Time or Traffic
Pa
vem
ent
Co
nd
itio
nCorrective Repairs
Rehabilitation
Time or Traffic
Pa
vem
ent
Co
nd
itio
nRehabilitation
Reconstruction
Time or Traffic
Pa
vem
ent
Co
nd
itio
nReconstruction
Applying the right treatment
. . . To the right pavement
. . . At the right time
Philosophy of Pavement Preservation
Benefits of a Pavement Preservation Program
Higher customer satisfaction Better informed decisions Improved strategies and
techniques Improved pavement condition Costs savings Increased safety
Better Informed Decisions
Program relies on proper treatment selection and treatment timing
Need information to make decisions
Successful programs have been integrated with Pavement Management Systems (PMS)
Improved Pavement Condition
Preventive maintenance helps to preserve a pavement and extend its performance
Overall condition of network improves Fair, Poor, and Failed Pavements are
reconstructed and returned to a high pavement condition
Excellent and Good Pavements are kept in high condition
Time or Traffic
Pa
vem
ent
Co
nd
itio
n
PreventiveMaintenance
Pavement Condition
Effect of Pavement Preservation
0
10
20
30
40
50
60
70
80
% Poor % Fair % Good % Excellent
% o
f P
avem
en
t N
etw
ork
1994 Base 1999 Worst First 1999 Preventive
Cost Savings
Most persuasive argument for shifting to preventive maintenance strategies
Forms of cost savings Less expensive treatments Longer pavement life Reduction of user delay costs
Preventive maintenance: $10,270 Rehabilitation: $45,570 Reconstruction: $574,000
Cost Comparison of Options
Use of PMS Information
0
10
20
30
40
50
Failed Poor Fair Good Excellent
Condition Rating (PCI)
Perc
en
t of
Netw
ork
Current
Year 5
Increased Safety
Safety is the #1 priority of users Explicit benefits
Improved surface friction Fewer defects
Implicit benefits Better pavement condition Fewer and less disruptive repairs
Additional Benefits
Agencies have a stable budget Agencies have stable workforce Contractors have stable workforce Not affected by upswings and
downswings
Current Funding Status
In the past, eligibility for Federal funding required that the pavement be improved structurally
Recent highway bills have changed the way preventive maintenance is funded
Challenges to Implementation
Agencies that have implemented a preventive maintenance program report extremely positive results.
Why isn’t everyone doing it? Barriers, both real and perceived...
Public Perceptions
Public averse to steering maintenance dollars toward pavements in good condition
Agencies more likely to receive complaints about specific defects than overall network
Need to educate the public about new philosophy
Management Perceptions Need commitment from
management to succeed Maintenance not traditionally given
a high priority Need to create awareness of
benefits Personnel changes disrupt
continuity
Summary Anticipated benefits
Higher customer satisfaction Better informed decisions Improved strategies and techniques Improved pavement condition Cost savings Increased safety Stability
Summary (cont’d) Challenges are
widespread Public perception Management perception
So what is Pavement Management ?
Systematic method for routinely collecting, storing, and retrieving decision-making data needed to make maximum use of limited dollars
It also creates a set of steps or computer routines for quickly accessing the data to arrive at educated decisions
Review
Become familiar with terminology Distinguish between preventive
and reactive repairs Understand basic pavement
management concepts Monitoring pavement condition Pavement life cycle
Questions?
PMS