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Recycled Asphalt Pavement (RAP) - State of the Industry Report: More and more agencies in Colorado are following the CDOT lead and standardizing RAP usage with specifications allowing 20% RAP top lift and 25% in lower lifts. The Colorado DOT RAP Specification change was made in 2008 and the following statement was included in the justification report for the change;
The Materials Advisory Committee voted unanimously make this change. Nationally, 20% RAP has long been allowed in the top lift of asphalt mats. CDOT previously allowed up to 15% RAP in the top lift while studies regarding binder aging of RAP were done. Studies have shown that 20% RAP can safely be used in the top mat without introducing thermal cracking. The RAP Task Force felt there were enough controls in place, enough study data, and enough experience with RAP that CDOT could increase the use of RAP to 20% in the top lift.
CDOT Maintenance Mix Requirements have been changed to follow the engineering standard of 25% lower lifts and 20% top mat
The amount of recycled asphalt pavement (RAP) used in Colorado continues to increase. CDOT led the way in 2009 with a 70% increase from 80,000 tons to 135,000 tons. A number of local agencies made specification changes to match the CDOT RAP specification by allowing 25% RAP in lower lifts and 20% in the top mat. See the joint CAPA/CDOT press release
– CDOT has developed a Draft plan to implement Warm Mix Asphalt. Comments on the plan can be directed to Tom Clayton at tomclayton@co-asphalt.com
<more see The Denver Channel.com>
Feds Rescind $114 Million from CDOT On September 30, 2009, the Federal Highway Administration rescinded $8.7 billion nationally according to Federal law. The Colorado share of the rescission was approximately $115 million and resulted in a $50 million in “real” dollars cut from construction spending in 2010 (read more). The fall kickoff meeting of the Asphalt Industry Forum (AIF) will be held at 8:30am on October 28, hosted by Aggregate Industries. The AIF is the joint CAPA/CDOT technical forum to discuss asphalt related specifications and technology. All CAPA members are invited to attend. To see the agenda, click here. 2010 CDOT Pavement Projections The preliminary outlook for CDOT funded paving projects in 2010 shows a sharp decline in number of projects and amount of hot mix asphalt. A 2010 Draft HMA Projection Summary and a 2010 Asphalt Binder Summary have been submitted by CDOT.
- CDOT Executive Director Russ George attended a recent meeting of the CAPA supported transportation funding coalition Move Colorado. He reported that the percentage of state highway in poor condition has increased from 40% to 47%. A new report titled Transportation Deficit Report is available from the What’s New? section of the CDOT website.
- The LabCAT Board of Directors met on August 26 and approved a motion to continue the LabCAT Certification program for another year. The program has been administered by CAPA since 1995 and is in the 3rd year of its current 5 year agreement with CDOT.
- The CDOT funding for 2010 paving projects is becoming clearer. The FY10 Surface Treatment control total has been set ($93 M) and 2010 projects from ARRA Project Savings ($40 M), FASTER Safety Funds ($68M), and remaining ARRA projects ($100 M) are being determined. For more information and copies of draft project lists, contact office@co-asphalt.com
The next meeting of the CAPA/CDOT Asphalt Binder/Emulsion Task Force will be 10:00am, October 8, at the CAPA Office. Minutes from the August 25 meeting and a Draft Flow Chart to address material shortages has been developed. For more information, contact Industry Co-Chairperson Mandy Monjaras of Mt. States Materials. Mmonjaras@mountainstatesmaterials.com (307) 638-2633.
10:00am, August 25, at the CAPA Office. The Task Force agreed to the following at the last meeting (July 23).
Add PG 70-28 to the list of binders to be used by CDOT. This will allow PG 70-28 to be used in lieu of PG 76-28 in the situations that allow for less modification.CDOT will develop a standard special specification for CRS-2R (latex). For more information, contact Industry Co-Chairperson Mandy Monjaras of Mt. States Materials. mmonjaras@mountainstatesmaterials.com (307) 634-5103.
Has it been 10 years already?? 2009 marks the 10 year anniversary of the initial rubblization plus asphalt overlay project in Colorado. Located on I-76, Sterling Interchange east 3 miles, the project consisted of a demonstration of both the resonant breaker and the multi-head breaker technology followed by 3-2” lifts of HMA. The pavement is performing well with no signs of rutting. The project was featured in The High Road - Summer, 1999.
Gov. Bill Ritter along with other officials were on hand Tuesday, May 19 for the  ground breaking of Colorado’s first highway project funded with Federal stimulus funds. Identified as the Transportation Initiative Generating Economic Recovery (TIGER), the program is an important part of the statewide program to “create jobs, promote economic recovery, make transportation improvements, and provide recovery act dollars for much needed programs”, as stated by the Governor. The SH 88 project, being constructed by CAPA Member Aggregate Industries of Golden is located on West Belleview Ave. in Littleton between South Zuni and South Federal Blvd. CDOT Executive Director Russell George pointed out that $1.2 million was originally set aside to pave the approximately one mile project. With the current price of HMA construction materials and keen contractor competition, the project was bid at $407,000 vs. the original construction estimate of $580,000. Even with the cost of CDOT engineering and project testing there will be funding left over to be used on other projects. Work on the Belleview project is expected to take approximately 30 days. FHWA Assistant Division Administrator Doug Bennett stated that CDOT has exceeded a significant milestone of the use of the ARRA (Stimulus) funds by obligating a minimum of 50% of the state funds within 120 days. As of May 15, $180 million had been obligated on 37 projects.
May 12, 2009: Suncor Energy Inc. has announced an agreement with SemGroup Energy Partners, L.P. (SGLP) that establishes a new business relationship between Suncor and SGLP for the use of four asphalt specialty production plants in Colorado. Two of these plants are located in Commerce City, one in Pueblo and one in Grand Junction. The agreement allows Suncor the exclusive use of the facilities to store, throughput and process asphalt from our refinery into polymer modified asphalt cement (PMAC) and asphalt emulsions. With the use of the SGLP facilities, Suncor will be the primary supplier for these products in Colorado. Suncor is not purchasing these assets; SGLP will continue to own and operate the facilities at the direction of Suncor. Suncor will be responsible for sales of the finished product and product quality oversight. Suncor will begin to quote these products almost immediately, and are working to expedite the start-up of the facilities. For more information, contact Norb Schreiber, Manager, Asphalt Marketing, 303-796-2688 (office), nschreiber@suncor.com
CDOT – AC Cost Adjustment Provision - Update
Changes are planned to the CDOT AC Cost Adjustment Provision. A joint CAPA/CDOT Task Force has agreed to a change that would base the index on the prior month daily average versus the current spot price on the 1st day of the month. The proposed AC Cost Adjustment Specification is available for review. It is expected that the revised change should be approved and implemented on some remaining 2009 projects.
An updated (September 11, 2008) Approved Products List (APL) 2008 CDOT Qualified Binder Suppliers includes the following new additions.
Mountain States Materials (WY)
PG 58-28, PG 58-34, PG 64-22, PG 70-28 and PG 76-28
NuStar (Santa Fe, New Mexico)
PG 58-28, PG 64-22, PG 70-28Valero (Santa Fe, New Mexico)
Tentative PG 58-28, PG 64-22
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