nhi maintenance course updates (web-based & instructor-led) · nhi maintenance course updates...
TRANSCRIPT
NHI Maintenance Course Updates (Web-Based & Instructor-Led)
Pacific Northwest Bridge Maintenance ConferenceOct 13th, 9:30 to 10:00 am
Eric Thorkildsen, PEGreenman-Pedersen, Inc.
Presentation Sponsors of the Training
• National Highway Institute (NHI)• Training arm of Federal Highway (FHWA)
How to train bridge maintenance personnel• Adult Learning Techniques
What have we developed• Reference Manual• Web Based Training• Instructor Led Training
Bridge Maintenance Course
You are here
Reference Manual
• Over 1,000 pages• 25 Chapters• 22 Checklists• Decision Aid Matrices
Contents
• Bridge Management• Bridge Anatomy• Bridge Mechanics• Concrete• Approach• Decks• Railings• Drainage• Superstructure
• Bearings• Substructures• Culverts• Channels• Masonry• Movable• Decision Aids
• Bridge Cleaning• Lubricating Bearings• Deck Repairs• FRP Repairs• Steel Truss Repairs• Inspection Reports
“Suggested Procedures”
Tips
Web Based Training
• 8 Hours on‐line• Background Info• 6 Modules
Fundamentals of Bridge Maintenance
FHWA-NHI-130107A
Welcome & Introduction
Navigational Features: Adobe Presenter
Outline tab
Narration tab
Search tab
Fundamentals of Bridge Maintenance
FHWA-NHI-130107A
Bridge Maintenance Management
FHWA-NHI-130107A
Fundamentals of Bridge Maintenance
Module 2
Bridge Maintenance Management
Fundamentals of Bridge Maintenance
FHWA-NHI-130107A
Bridge Maintenance Management
Module Introduction
This module contains the following lessons:
• Lesson 1: Bridge Inspections
• Lesson 2: Maintenance Management Systems (MMS) and Bridge Management Systems (BMS)
• Lesson 3: Bridge Maintenance Planning and Scheduling
• Lesson 4: Contracting Methods
• Lesson 5: QA/QC Practices
This module will take approximately 80 minutes to complete.
During each lesson, knowledge checks are provided to test your understanding of the material presented.
Instructor Led Training
• 4 Days• 7 Modules• Lecture• Hands On Activities• Adult Learning
Culvert Bedding
Mudjacking
NHI‐130108Bridge Maintenance
Lesson 1: Maintenance and Preservation Techniques
for Concrete Decks and Slabs
Module 2: Maintenance and Preservation Techniques
for Decks and Slabs
2:1-18
Learning Outcomes• Explain common deficiencies of concrete
bridge decks and slabs• Describe concrete deck and slab protection
methods• Review the washing and cleaning
procedure for concrete decks and slabs
2:1-19
Share Your Experiences!•How many decks do you maintain that are covered in asphalt?
•Have you performed… o Epoxy injection?o Deck repairs?o Surface sealing?o Surface milling?o Hydrodemolition?
2:1-20
Concrete Deck Protection Methods• Washing and cleaning • Corrosion resistant reinforcing• Crack control and sealing• Waterproofing and concrete sealers• Cathodic and Galvanic protection• Overlays
2:1-21
Crack Sealing by Sealers• Crack sealing with penetrating sealers• Applied by spraying or pouring on the deck
and spreading over the entire area using brooms or squeegees
• Low viscosity penetrating sealers
2:1-22
Waterproofing & Concrete SealersSealer Type Type Thickness
Silane Penetrating 0
Siloxane Penetrating 0
High Molecular Weight Methacrylate (HMWM)
Penetrating 0
Epoxy Healer Sealer Penetrating/ Film Former 3 ‐ 10 Mils
Methacrylate Penetrating/ Film Former 20 ‐ 30 Mils
Polyurethanes Film Former 3 ‐ 5 Mils
2:1-23
Crack Sealant Comparison Attribute Silane/Siloxane
Heavy Weight Methyl Methacrylate, Polyurethanes
Epoxy Healer Sealer Injection Epoxy
Typical Applications*
Waterproofing good condition
concrete
Crack sealers for widespread fine cracking
Crack sealers for widespread fine
cracking
Crack sealer for widespread discrete larger crack widths
Viscosity (Centipoise) <1 20 ‐ 200 50 ‐ 150 500 ‐ 2000
Pot Life (Minutes) NA 5 ‐ 45 20 ‐ 60 15 ‐ 30
Minimum Cure Time (Hours) 1 ‐ 4 2 ‐ 12 3 2
Expected Useful Life (Years) 3 ‐ 5 5 ‐ 10 5 ‐ 10 5 ‐ 10
2:1-24
Healer Sealer
Epoxy Overlay
Deck Prep
Full & Partial Depth Concrete Spall Repair
2:1-28
Full & Partial Depth Concrete Spall Repair (con.)
2:1-29
Concrete Deck Overlays• Asphalt • Concrete • Polymer concrete
2:1-30
Overlays ‐ Polymer• Polymer concrete overlays
o Light weighto Result in minimal grade differenceso Reduce permeability
• Use resins of epoxy, epoxy urethane, or methyl methacrylate
2:1-31
Group Case Study
