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This webinar was co-sponsored by ASCE's Transportation and Development Institute (T&DI) and ASCE Continuing Education

Instructor:  David K. Hein, P.E.

Course Length: 1 Hour

Purpose and Background

The ASCE 2017 Infrastructure Report Card bestowed and overall rating of America's road infrastructure. America's roads are chronically underfunded and are becoming more dangerous. After many years of decline, traffic fatalities are again increasing. Traffic congestion and poor infrastructure condition are playing a significant part in increasing collisions. One out of every five miles highway pavement is in poor condition and state and municipal roadway conditions are even worse. The U.S. has been underfunding its highway system for years resulting hundreds of billions of dollars in maintenance and rehabilitation backlog.

A large contributor to pavement deterioration is moisture infiltration. Keeping the water out of the pavement has long been a mantra to pavement engineers. Water on the pavement surface contributes to surface splashing and spraying and possible hydroplaning which can impact driver safety. Water infiltration into the pavement structure and subgrade can also reduce the load bearing capacity of the pavement materials which in term reduces the service life of pavements.

This webinar outlines the basics of the impact of moisture on pavements and factors affecting permeability. Also, it provides an overview of methods to measure moisture infiltration and details on techniques to reduce pavement permeability and improve pavement surface friction.

Primary Discussion Topics

• Overview of pavement types and surfaces
• Impact of water on pavement surface/base/subbase/subgrade
• Methods to measure pavement surface friction
• Methods to measure permeability
• Methods to improve pavement surface friction
• Methods to reduce pavement permeability
• Quality assurance/control
• Key features to ensure pavement longevity
• Recognize key design and construction features that impact performance

Learning Outcomes

Upon completion of this course, you will be able to:

• Explain the importance of pavement surface friction
• Recognize the impact of surface water and infiltration
• Know how to measure permeability effectively
• Recognize important pavement material requirements
• Determine methods to reduce permeability

Webinar Benefits

• Recognize pavement surface types and their ability to resist the impact of water on their performance
• Determine the differences in how permeability is measured for pavement materials and subgrades
• Discover common methods to improve pavement surface friction
• Discuss techniques to reduce the impact of water on pavement performance

Assessment of Learning Outcomes

Students' achievement of the learning outcomes will be assessed via a short post-assessment (true-false, multiple choice and fill in the blank questions).

Intended Audience

• Civil engineers responsible for the design, construction, maintenance and rehabilitation of pavements
• Agencies and other owners of highway, municipal, and private sector pavement infrastructure
• Pavement material suppliers and contractors
• Operations personnel responsible for the maintenance and rehabilitation of pavements

Webinar Outline

• Overview of pavement types and surfaces
• Asphalt concrete
• Concrete
• Gap/Open graded
• ourface/chip seal
• Gravel
• Impact of water on pavement surface/base/subbase/subgrade
• Reduction in friction
• Contribution to surface deterioration, e.g. potholes
• Material and subgrade layer softening
• Methods to measure pavement surface friction
• Vehicle based equipment
• Portable equipment
• Laboratory equipment
• Methods to measure permeability
• Florida, NCAT, Texas and Guelph permeameters
• ASTM C1701 and ASTM 1781
• Material characteristics
• Methods to improve pavement surface friction
• Aggregate type and distribution
• Surface texturization
• High surface friction bonded products
• Methods to reduce pavement permeability
• Cross section design
• Mix design
• Surface sealers
• Other pavement preservation activities
• Quality assurance/control
• Key features to ensure pavement longevity

How to Earn your CEUs/PDHs and Receive Your Certificate of Completion

To receive your certificate of completion, you will need to complete a short on-line post-test and receive a passing score of 70% or higher within 1 year of purchasing the course.

How do I convert CEUs to PDHs?

1.0 CEU = 10 PDHs [Example: 0.1 CEU = 1 PDH]