Skip to main content

New structural design guide for porous asphalt offers ‘green infrastructure solution’

Structural Design Guidelines for Porous Asphalt Pavements

A new publication provides guidelines for the structural design of permeable asphalt pavements using the AASHTO 93 Design Methodology

Porous asphalt pavements are considered a green infrastructure solution and provide the performance, ease of construction and functionality of traditional asphalt pavements but with a permeable structure that helps manage stormwater, according to the National Asphalt Pavement Association (NAPA).

Commonly used for parking lots and other light-duty applications, full-depth porous asphalt pavements are increasingly used on roadways to help “mitigate flooding hazards, reduce hardscape and improve sustainability,” a press release says.

To help ensure reliable performance under traffic, NAPA has published Structural Design Guidelines for Porous Asphalt Pavements.

“Often the design of porous asphalt pavements is focused on how well the pavement will handle water, not traffic,” says civil engineer Audrey Copeland, NAPA vice president for engineering, research and technology.

“For most parking lots and light-duty surfaces this may be a reasonable approach,” she says, “but as public agencies look to use full-depth porous asphalt pavements on roadways a traditional structural design methodology is needed.”

Design examples are included for full-depth porous asphalt pavement systems with and without an asphalt-treated permeable base, as well as a catalogue of required layer thicknesses for different traffic levels.

Written by Charles W. Schwartz, Ph.D., and Kevin D. Hall, Ph.D., P.E., with the support of the NAPA-SAPA Pavement Economics Committee’s Pavement Design Task Group, Structural Design Guidelines for Porous Asphalt Pavementsdiscusses the structural design procedure for porous asphalt and the required inputs using the AASHTO 93 design method.

“This new publication helps pavement designers and agencies apply the widely used and accepted AASHTO methodology to porous asphalt pavements,” Copeland says.

The book includes guidance on:

  • Determining structural design input values
  • Calculating minimum layer thicknesses
  • Limits on effective structural thickness.

Structural Design Guidelines for Porous Asphalt Pavements compliments the previously published Porous Asphalt Pavements for Stormwater Management: Design, Construction and Maintenance Guide. Both books are available as PDF downloads through the NAPA Online Store, store.asphaltpavement.org.

 



from Equipment World https://ift.tt/2vpVC3U
via Handy Rep Ai
Labels:

Comments

Post a Comment

Popular posts from this blog

Raleigh N.C. 540 outer loop faces environmental legal fight

The map above shows the 540 extension’s general location. Credit: NCDOT Environmental groups have filed a petition challenging the planned path of a future outer loop around Raleigh, North Carolina, due to concerns about the effect on nearby waterways that are home to endangered mussels. The $2.2 billion toll highway, an extension of N.C. 540, would complete the southern portion of an expressway outer loop. The construction contract for the first phase was awarded in December , and the N.C. Division of Water Quality recently issued an environmental permit for the project. The Southern Environmental Law Center , along with other environmental groups, is petitioning for an administrative hearing to challenge the environmental permit. The SELC says the proposed highway would “tear through 57,000 linear feet of streams and 70 acres of wetlands.” The groups are also concerned about increased stormwater runoff from the additional pavement from the highway, as well as more greenhouse em...
Post a Comment
Read more

Walk-In Interview for Overseas on 2nd May 2018 | Travel Point HR Solutions India | 5 – 25 yrs | Chennai

Walk-In Interview on 2nd May 2018 at Chennai for Overseas Location Saudi Arabia  Candidates should be B.E/ B.Tech / Degree with Min 5 yrs of Exp Candidates from sea water Destination and power Production Walk-In Interview on Wednesday 2nd May 2018 Venue: Travel Point HR Solutions India APJ Buinesss center, 12 Haddows Road, Nungambakkam, Chennai Tamil Nadu – 600006 Contact : MS : Waseema – 9704675049 / 040-33151524                  Mr. Samee – 8886644854 / 040- 33151523 Email Address: e ngineers@travelpointhr.com Electrical Engineer 36 Openings Implementation of policies and procedure Supervising the working staff and updating the periodic maintenance schedule with the concerned parties as their polices following the programs and the working table of preventing maintenance Achieving and following repairing works and the daily maintenance to secure that they matching the required quality according the stander maint...
Post a Comment
Read more

Jobs In Reliance | Mumbai | Pune | Ahmedabad

Reliance Industries Limited is the largest private sector corporation in India with annual revenue of US$ 62.2 billion and net profit of US$ 3.8 billion. The Group activities span hydrocarbon exploration and production, petroleum refining and marketing, petrochemicals, retail and telecommunications. Reliance Industries Ltd is India first private sector company to feature in Fortune Global 500 list of World Largest Corporations currently ranking 114th in terms of revenue & 155th in terms of profit. RIL strives to be a product and service leader across its industries, a great work-place and above all, to create value for its stakeholders and society. Warehouse Operation- Executive / Manager  Job Description 1. To manage people, processes and systems efficiently and make sure productivity targets and SLAS are met. 2. Keeping stock control systems up to date and making sure inventories are accurate. 3. Planning, coordinating and monitoring the Receiving, Put awa...
Post a Comment
Read more