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PAVEMENT PRESERVATION TREATMENT CONSTRUCTION GUIDE
CHAPTER 1: INTRODUCTION
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Chapter 1: Introduction: Media

Unit 1:

Stress in a Pavement from Wheel Loads

Figure 1: Stress in a Pavement from Wheel Loads

Load Spreading Effect on Subgrade

Figure 2: Load Spreading Effect on Subgrade

  Illustration of a cross section of a typical flexible pavement. From bottom to top, flexible pavement has subgrade, optional subbase course, base course, and surface course.

Figure 3: Typical Pavement Cross Sections

Illustration of the elements of pavement structure. From bottom to top, the elements are: well-drained pavement structure, stiff road base resistant to deformation and cracking, skid-resistant road surface, and a moving wheel load.

Figure 4: Elements of a Pavement Structure

 

Unit 2:

No images.

Unit 3:

Components of Pavement Preservation

Figure 5: Components of Pavement Preservation

A chart illustrates typical pavement deterioration and shows that for each $1 spent on preventive maintenance at about the 10-year mark, $6 to $10 are saved on rehabilitation or reconstruction costs at the 20 year mark.

Figure 6: The Cost of Not Carrying Out Preventive Maintenance in a Timely Way

 

Unit 4:

Chart illustrates treatment categories based on pavement condition. Pavement in good condition that is properly maintained requires reconstruction later than a road whose maintenance is deferred.

Figure 7: Treatment Strategy Based on Pavement Condition

Pavement rating form shows the type of information to collect, including air and pavement surface temperatures, types of cracks observed – longitudinal, fatigue, transverse, reflective, block, and edge – and types of deformities observed, including rutting, depression, and overlay bumps.

Figure 8: Typical Pavement Rating Form - Visual