Seal Coat and Surface Treatment Manual

♦Manual Notice 2024-1
►1. General Principles
- ►1. Overview
  - ►Pavement Preservation
- ►2. Functions of Surface Treatments and Seal Coats
  - ♦General
- ►3. Factors Influencing Performance
  - ♦General
- ►4. Principal Faults or Defects in Seal Coats and Surface Treatments
  - ♦General
  - ♦Loss of Aggregate
  - ♦Poor Adhesion or Bond to Road Surface
  - ♦Streaking
  - ♦Flushing
  - ♦Surface Treatments Defects�
►2. Guidelines for Treatment Selection
- ►1. Seal Coats as a Preventive Maintenance Technique
  - ♦General
- ►2. Selecting Pavements for Seal Coat Treatment
  - ♦General
  - ♦Pavement Distress Types
- ►3. Traffic Volume Considerations for Seal Coat Treatment
  - ♦Overview
  - ♦Short-Term Aggregate Loss
  - ♦Vehicular Damage
  - ♦Tire Noise
  - ♦Prolonged Traffic Control
- ►4. Strip or Spot Sealing
  - ♦General
- ►5. Surface Treatments
  - ♦General
- ►6. Fog Seal
  - ♦General
►3. Material Selection and Plan Preparation
- ►1. Communication and Coordination
  - ♦General
- ►2. Selection of Binder
  - ♦General
  - ♦Asphalt Cement
  - ♦Cutback Asphalt
  - ♦Emulsified Asphalt
  - ♦Specification Tests
  - ♦Weather Conditions
- ►3. Selection of Aggregate
- ►4. Planning and Contracting
  - ♦Calculate Quantities
  - ♦Estimate of Materials
  - ♦Preparing Plans
  - ♦Estimating Cost
►4. Binder and Aggregate Application Rates
- ►1. Modified Kearby Design Method
  - ♦General
  - ♦Laboratory Tests
  - ♦Determining Design Rates
- ►2. McLeod Design Method
  - ♦General
  - ♦Design Procedure Components
  - ♦McLeod Seal Coat Design Equations
- ►3. Transversely Varying Asphalt Rates
  - ♦General
  - ►Considering Why and When to Require TVAR�
►5. Duties of Inspector or Crew Chief
- ►1. Authority of Inspector
  - ♦General
  - ♦Inspection of Materials and Work
- ►2. Duties of the Inspector or Crew Chief
  - ♦General
  - ♦Duties
- ►3. Specifications and Plans
  - ♦General
  - ♦Standard Specifications
  - ♦Special Specifications
  - ♦Special Provisions
  - ♦Plans
- ►4. Safety
  - ♦General
►6. Pre-Seal Coat Activities
- ►1. Overview
  - ♦General
- ►2. Repairs and Patching
  - ♦General
  - ♦Timing
  - ♦Types of Repairs
- ►3. Stockpiling Aggregate
  - ♦General
  - ♦Supplier
  - ♦Aggregate Sampling and Testing
  - ♦Stockpile Locations
  - ♦Contamination
  - ♦Area Preparation
  - ♦Proper Stockpile Techniques
- ►4. Preconstruction Meeting
  - ♦General
  - ♦Meeting Objectives
  - ♦Attendees
►7. Equipment Inspection
- ►1. Introduction
  - ♦General
  - ♦Provisions for Inspection
  - ♦Inspecting for Leaks
  - ♦Safety
- ►2. Rotary Broom
  - ♦General
  - ♦Identifying Data
  - ♦Safety Markings
  - ♦Bristles
  - ♦Brush Controls
  - ♦Older Model Brooms
- ►3. Asphalt Distributor
  - ♦General
  - ♦Asphalt Binder Tank
  - ♦Distributor Heating System
  - ♦Distributor Circulation and Pumping System
  - ♦Filter Screens
  - ♦Distributor Spray Bar
  - ♦Hand Sprayer
  - ♦Distributor Controls and Gauges
- ►4. Aggregate Spreader
  - ♦General
  - ♦Truck Hitch
  - ♦Receiving Hopper
  - ♦Belt Conveyors
  - ♦Discharge Hopper
  - ♦Discharge Gates
  - ♦Discharge Roller
  - ♦Wheels and Tires
  - ♦Brakes and Clutch
  - ♦Tailgate Aggregate Spreader
- ►5. Haul Trucks
  - ♦General
  - ♦Size
  - ♦Condition
  - ♦Hoist
  - ♦Tailgate
  - ♦Hitch
  - ♦Identifying Numbers
  - ♦Bed Measurements
  - ♦Volume of Truck Bed with Deduction for Hydraulic Ram Cover
  - ♦Acceptable Size
- ►6. Rollers
  - ♦General
  - ♦Identifying Data
  - ♦Weight Certification
  - ♦Pneumatic Rollers
- ►7. Front-End Loader
  - ♦General
  - ♦Identifying Data
  - ♦Visual Inspection
- ►8. Heater and Storage Unit
  - ♦General
  - ♦Temperature
  - ♦Safety
  - ♦Storage Tank
  - ♦Heater
  - ♦Pump Unit
  - ♦Heater Unit Location
  - ♦Recording Thermometer
  - ♦Transporter and Booster
  - ♦Identifying Data
  - ♦Manifest
  - ♦Cleanliness
  - ♦Contamination
  - ♦Booster Tanks
  - ♦Insulation
►8. Seal Coat/Surface Treatment Application Process
- ►1. Overview
  - ♦General
- ►2. Weather
  - ♦Introduction
  - ♦Temperature
  - ♦Humidity
  - ♦Wind
  - ♦Rain
- ►3. Traffic Control
  - ♦Introduction
  - ♦Pre-Positioning
  - ♦Displaying Signs
  - ♦Traffic Cones
  - ♦Flaggers
  - ♦Pilot Vehicle
  - ♦Repositioning Traffic Control Devices
  - ♦Intersections
  - ♦Arrow Boards
- ►4. Removing Pavement Markers
  - ♦General
- ►5. Cleaning the Pavement
  - ♦Introduction
  - ♦Safety During Sweeping Operations
  - ♦Sweeping Pattern
  - ♦Sweeping Distance from Operation
- ►6. Placing Temporary Tabs
  - ♦General
- ►7. Setting the Rock Lands
  - ♦Introduction
  - ♦Purpose
  - ♦Calculating the Length of Rock Land
  - ♦Marking the Rock Lands
- ►8. Setting the Asphalt Shots
  - ♦Introduction
  - ♦Asphalt Application Rate
  - ♦Distributor Capacity
  - ♦Calculating the Length of Asphalt Shot
  - ♦Marking the Asphalt Shot
- ►9. Checking the Loader Operation
  - ♦Introduction
  - ♦Loader Operation Checklist
- ►10. Placing Paper Joints
  - ♦Introduction
  - ♦Equipment
  - ♦Beginning of Asphalt Shot
  - ♦End of Asphalt Shot
  - ♦Subsequent Asphalt Shots with Multiple Distributors
- ►11. Shooting the Asphalt
  - ♦Introduction
  - ♦Distributor Preparation
  - ♦Blow the Nozzles
  - ♦Check Spray Bar Height
  - ♦Final Equipment Check
  - ♦Paper Joint Check
  - ♦Transverse Alignment
  - ♦Applying the Asphalt
  - ♦Timing for Aggregate Application
  - ♦Additional Distributors
- ►12. Strapping the Distributor
  - ♦Introduction
  - ♦Determining Asphalt Application Rate
- ►13. Spreading the Aggregate
  - ♦Introduction
  - ♦Aligning the Spreader Box
  - ♦Truck Hookup
  - ♦Test Strip
  - ♦Spreading the Aggregate
  - ♦Truck/Spreader Separation
  - ♦Rock Land Marker
  - ♦Visual Checks
  - ♦Recording Truck Loads
  - ♦Asphalt on Tires
- ►14. Timing for Aggregate Application
  - ♦Introduction
  - ♦Immediate Aggregate Application
- ►15. Rolling the Aggregate
  - ♦Introduction
  - ♦Rolling Pattern
  - ♦Checking the Rolling Pattern
- ►16. Patching or Hand Work
  - ♦Introduction
  - ♦Immediate Repairs
  - ♦Delayed Repairs
- ►17. Intersections and Irregular Shapes
  - ♦Introduction
  - ♦Transitions
  - ♦Radii at Intersections
  - ♦Crossovers on Divided Highways
  - ♦Driveways and Private Roads
  - ♦Problems with Hand Work
- ►18. Brooming Excess Aggregate
  - ♦Introduction
  - ♦Timing
  - ♦Equipment
  - ♦Procedures
  - ♦Inspection
- ►19. Opening to Traffic
  - ♦Introduction
  - ♦Traffic Volume
  - ♦Truck Traffic
  - ♦Traffic Speed
  - ♦Asphalt Type and Weather Conditions
  - ♦Changing Lanes
- ►20. Temporary or Permanent Pavement Markings
  - ♦General
  - ♦Temporary Markings
  - ♦Permanent Markings
- ►21. Placing Raised Pavement Markers
  - ♦General
- ►22. Cleanup
  - ♦Joint Paper
  - ♦Spilled Asphalt
  - ♦Stockpile Area
  - ♦Signs and Barricades
  - ♦Repairs to Damaged Property
►9. Public Perception and Complaints
- ►1. Handling Complaints
  - ♦General
- ►2. Public Perception and Education
  - ♦General

Manual Notice: 2024-1

From: R. James Stevenson, P.E. Director, Maintenance Division

Manual: Seal Coat and Surface Treatment Manual

Effective Date: September 30, 2024

Purpose

The Seal Coat and Surface Treatment Manual has been revised to bring it up to date with current policies, practices and terminology. Chapter 3 Section 3 has been updated.

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Changes

Chapter 3 Section 3: Adds guidance on bicyclist considerations for seal coat aggregate size.

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Contact

Address questions concerning information contained in the Manual Notice to Dennis Berryhill, MNT Prgm & Projects Coordinator, Maintenance Division at (512) 457-9308 or dennis.berryhill@txdot.gov.

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Manual Notice: 2024-1

Purpose

Changes

Contact

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