module 1-2 introduction to preventive maintenance 1-2.1
Post on 20-Dec-2015
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TRANSCRIPT
Module 1-2
Introduction to Preventive Maintenance
1-2.1
1-2.2
Learning Outcomes1. Explain the concept of preventive
maintenance2. Discuss the importance of treatment
timing3. List the benefits of a preventive
maintenance program4. Describe a good candidate pavement
for preventive maintenance
1-2.3
Failing to Learn
... or learning from failure
Over-applied band-aid crack sealant leads to moratorium in New York
Cracked windshield claims lead to bans (many agencies)
Claims in Michigan lead to restrictions on double chip seals and microsurfacing
1-2.4
Planned strategy Cost effective treatments Maintains or improves functional
condition Does not increase structural capacity
Defining Preventive Maintenance
Preventive Maintenance Concept
Keeping good roads in good condition!Keeping good roads in good condition!
1-2.5
1-2.6
Preventive Maintenance and Safety
1. Treatments are excellent opportunity to improve safety characteristics
2. Potentially more frequent work zones present challenges to both workers and drivers
3. Safe practices should always be followed
How do preventive treatments differ from routine/reactive treatments?
Similar treatments…different TIMING!
1-2.7
1-2.8
Age of pavement or surface Condition of pavement Next scheduled treatment
Preventive Maintenance Timing
Pav
emen
t C
ondi
tion
(Fun
ctio
nal o
rS
truc
tura
l)
Time (Years)
Preventive Maintenance
Reconstruction
Good
Poor Rehabilitation
DeferAction
Preventive Maintenance Timing
1-2.9
Time or Traffic
Pav
emen
t C
ondi
tion
PreventiveMaintenancePreventiveMaintenance
ReactiveMaintenanceReactiveMaintenance
RehabilitationRehabilitation
Importance of Treatment Timing
1-2.10
1-2.11
Expected Benefits Preserve investment
Improved pavement performance Long term cost savings/leveling
High level of service Increased safety Greater customer satisfaction
1-2.12
Preserving the Investment Keep water out! Reduce debris infiltration into joints or
cracks Slow aging effects of bituminous
pavements Minimize dynamic loads
1-2.13
Maintain good rideability Maintain good surface friction Minimize potentially dangerous
surface characteristics
Maintaining High Level of Service
1-2.14
Impact on Distress Prevent or slow some distresses from
occurring Correct minor surface deterioration
1-2.15
HMA Problems Reduced/Slowed with Preventive Maintenance Oxidation/raveling Block cracking Edge cracking Crack deterioration Roughness Potholes
1-2.16
Minor rutting Raveling Bleeding/flushing Surface friction loss Roughness
HMA Problems Corrected with Preventive Maintenance
1-2.17
PCC Problems Reduced/Slowed with Preventive Maintenance Loss of fines (pumping) Corner breaks Joint faulting Joint spalling Crack deterioration Roughness Blow-ups
1-2.18
PCC Problems Corrected with Preventive Maintenance Joint seal damage Map cracking and scaling Surface friction loss Roughness
1-2.19
Evaluating Pavements for Preventive Maintenance
What you don’t see may be more important than what you do see!
Condition Friction Roughness Ability to carry loads
1-2.20
Good Candidate Pavements for Preventive Maintenance No structural failures Minimal distress (extent and severity) Relatively young in age Minor functional problems Few historical problems with similar
projects
1-2.21
When is it too late for preventive maintenance?
HMA Problems PCC Problems Potholes Severely
deteriorated cracks Delamination Unstable rutting
Blow-ups Corner breaks Severely
deteriorated cracks
1-2.22
Review: Learning Outcomes1. Explain the concept of preventive
maintenance2. Discuss importance of treatment
timing3. List the benefits of a preventive
maintenance program4. Describe a good candidate pavement
for preventive maintenance
JEOPARDJEOPARDY!Y!
1-2.23
Preventive Maintenance (PM) Jeopardy
Intro to Preventive
Maintenance
$100
$200
$300
$400
$500
1-2.24
Introduction to PM - $100 Keeping good roads in good condition
1-2.25
Introduction to PM - $200 Improved performance Greater customer satisfaction Cost savings Increased safety
1-2.26
Introduction to PM - $300 Potholes Severely deteriorated cracks Delamination Unstable rutting
1-2.27
Introduction to PM - $400 Age of pavement or surface Condition of pavement Next scheduled treatment
1-2.28
Introduction to PM - $500 Minor rutting Raveling Bleeding/flushing Surface friction loss Roughness
1-2.29