In-Place Recycling Conference in Ontario, California

By Dragos Andrei

October 18, 2012

The conference was a great success. Contractors, material suppliers, agencies and academia gathered for three days of presentations, discussions and field demonstrations of in-place recycling techniques.

If several years ago many of the participants came to this annual meeting to learn and hear what others are doing, the California conference brought the discussion to a new level: participants are here to share their experience, to learn how to take in place recycling further. California, Nevada, Texas, Oklahoma, Arizona, Alaska, South Dakota, Washington, Idaho, Utah, Nebraska, and the County of Los Angeles were there to share their experience with HIR, CIR and FDR.

A few notes from the meeting:

- use FDR not only to address base/subgrade instability. Use FDR to increase the structural capacity of the pavement for anticipated future traffic.

- FDR allows access for residents and businesses at all times during the construction process.

- keep CIR softer than AC so it can effectively slow down reflective cracks from propagating through the CIR into the new surface

- when the time comes to recycle again, recycle only the AC overlay, no need to recycle the existing CIR layer.

- in place recycling techniques reduce truck traffic, traffic congestions and closures related to construction activities. The result is reduced impact on businesses and road users during construction.

- consider removing the asphalt for later use as RAP instead of mixing it with underlying materials when doing FDR.

- 100% federal funds can now be used for in-place recycling projects, including full depth reclamation (FDR).

In a final discussion, agencies described some of the implementation hurdles they are facing:

- Funding: the great majority of agencies face a 40%- 50% reduction in maintenance and rehabilitation budgets over the next years. This is due to the expiration of the ARRA government funding.

- Inspection and training

- Education, many local agencies are still not familiar with in place recycling techniques

- Recycling subcontractor and prime contractor in conflict and agency in the middle

- High variability in the existing surface materials

- Utilities in the road that are not adjustable

- Ignoring structural capacity aspects

- The lack of standard specifications

Agency News

NCHRP Request for Proposals
NCHRP Project 09-58: The Effects of Recycling Agents on Asphalt Mixtures with High RAS and RAP Binder Ratios

Western Region In-Place Recycling Conference
If you missed the conference, this article will give you a brief overview of the events and some food for thought.

Western Region In-Place Recycling Conference in Ontario, California
The conference in coming to Southern California, September 11-13 at the Radisson Ontario Airport Hotel.

CIR/FDR in California City
Four lane divided highway in California City is getting a recycled makeover.

Center News

Road Map Issue No. 6
Visit our Publications page to see the latest PRRC newsletter.

RoadMap Issue No. 5
The July 2012 issue of RoadMap is now available.

Roadmap Issue #4 April 2012
The PRRC has published the fourth issue of the RoadMap.

COLAS Solutions Inc
The PRRC is pleased to announce that COLAS Solutions Inc. has joined the Founders Circle.

Roadmap Issue #3 November 2011
Check out the new issue of the Road Map.

Industry News

ARRA 2012 SEMI-ANNUAL MEETING October 29 – 30, 2012 St. Louis Union Station Marriott St. Louis, Missouri

ARRA 2011 Semi-Annual Meeting
In Portland, Oregon November 7-8. Register today at

2011 Southeast Regional In Place Recycling Conference
The PRRC will be in attendance August 30-September 1st.