What is a Resource? Any physical or virtual entity of limited availability A new or reserve supply that can be drawn upon when needed Something that one uses to achieve an objective An input to be used in an activity, especially production The ability to deal resourcefully with unusual problems; "a man of resource"

Streets and Local Roads Resources Philip Kresge Sr. Director, National Resources National Ready Mixed Concrete Association

Streets and Roads Thickness Design Longitudinal joint Transverse joint Subgrade Subbase Surface Texture Surface smoothness or rideability Thickness Design Dowel bars (may be optional) Concrete materials Tiebars

Understanding Design Optimization Design optimization is the balance of performance features and costs. Design optimization involves adjusting variables to: Achieve long life (durability) Reduce initial costs Minimize maintenance and rehabilitation costs, and/or Enhance sustainability.

Introducing StreetPave Software tool primarily for streets and roads Uses mechanistic-empirical modeling for thickness determination (like MEPDG but less complex) Direct comparisons of concrete and asphalt designs Allows life cycle cost analysis (LCCA) to compare “hard costs” (if local cost & performance data available). Approved by VDOT for streets and roads design

Global Inputs in StreetPave Project information Design life Reliability* Failure criteria* Terminal serviceability Percent cracked slabs *Should be selected based on policy and experience

StreetPave Input Examples First screen of walk-through wizard

Cost Initial Cost Rehabilitation Costs Maintenance Costs Salvage Value Time Cost Net Present Worth Time Life-Cycle Cost Analysis Combines all present and future costs (benefits)

Where to find StreetPave Available in two formats Full-feature Windows® version in available from ACPA website at Free, limited feature web- based version on ACPA’s website at StreetPave/index.asp

What can be done with an existing asphalt pavement? Concrete Overlays

Historical Review Began in late forties and early fifties First used on Airports and Secondary Roads In mid-seventies acceptance grew By late eighties this was normal practice Significant amounts of state and federal highways have been rehabilitated this way Concrete Overlays

Why Concrete Overlays? To enhance curb appeal To rehabilitate existing surface To add structural capacity To save money (reduce maintenance) To enhance safety Lighting Skid resistance

Ultra-Thin Whitetopping By Definition Thicknesses between 2” and 4” Bonded to underlying surface Short joint spacing 2’ – 6’ panels Existing asphalt pavement as base

Rte. 30, Lancaster, PA Intersection of Rte. 30 & Oakview Rd. In front of PennDOT County Maintenance Facility Placed Oct Existing asphalt pavement less than three years old In excess of 1,500 trucks per day Severe rutting/shoving Copyright ©2010 – NRMCA

Existing asphalt pavement was only 2-3 years old. Severe rutting, in excess of 5 inches, was a continual problem. Smaller vehicles actually “bottomed out” on ridge of asphalt! Copyright ©2010 – NRMCA

High/Early Strength concrete mix used to facilitate opening to traffic in 24 hrs. Copyright ©2010 – NRMCA

Rte. 30, Lancaster, PA Placed Oct Over 1,500 trucks per day 8.2+ million trucks in 15 yrs. service Copyright ©2010 – NRMCA

Available through the National Concrete Pavement Technology Center Copyright ©2010 – NRMCA

Other Resources

Training presentation available in-house or as online webinar Contact Bob Long at ACPA for details

Life-Cycle Costs - Executive Overview

Life-Cycle Costs - Technical Fact Sheet

Sustainability Considerations

Thank You! Philip Kresge Senior Director, National Resources