“This work consists of rehabilitating an asphalt concrete (AC) pavement by heating, then milling the AC pavement surface, collection of the recycled AC pavement, mixing of the recycled asphalt pavement with a recycling agent and between 15 and 30 percent new hot mix asphalt (Corrective HMA), and laying the HIR Remix as a single, homogeneous mix”, as it is summarized in the Notice to Bidders and Special Provisions document published by the State of California Department of Transportation (CalTrans) that called for bids from local road construction and maintenance companies. Martec has welcomed an opportunity to partner with PCC on this project and is proud to be a supplier of choice of its hot in-place recycling train to PCC – a successful bidder selected by Caltrans.

PCC has opted for the AR2000 as the preferred equipment to be used on this milestone project in California due its unique capability to provide heating, soft milling of the surface course up to the required 2″ (50 mm) in depth, 100% re-use of the existing materials as recycled asphalt pavement (RAP) and complete remixing of the RAP with the corrective admix in-situ – to produce a high quality final hot mix asphalt to be placed back on the ground in one pass, continuous operation.

Existing pavement to recycle has a challenging ‘sandwich’ nature: polymer modified asphalt with a top layer of the open graded wearing course.

Another key factor for choosing the AR2000 relates to a challenging nature of the existing pavement that is a combination of polymer modified asphalt (PMA) and open graded wearing course (OGWC): Martec’s AR2000 has demonstrated its ability to hot in-place recycle each of these types of pavement in the past. Hot in-place recycling of a mix of both PMA and OGWC will be the first time in the industry and unique for this project.

PCC is a general contractor for delivery of the overall HIR project and will be the operator of the AR2000 in California. PCC’s is also responsible for all associated works required for a successful completion of the HIR project, including road sampling and testing; pre-engineering study and mix design; and paving operation.

“Unveiling” the AR2000 stored in British Columbia, Canada for transporting to California, USA

Martec supplies its AR2000 to PCC on a rental basis and provides training of PCC’s operating personnel that will be completed alongside a real project in progress in Northern British Columbia, Canada where Peter’s Bros. Construction Ltd., a long time owner and operator of the first AR2000, works on its third HIR project this summer.

Caltrans, PCC and Martec share the same goal set up for this showcase HIR project in California: establish sustainable maintenance of asphalt roads, reduce cost and preserve the environment.

For more details and/or to inquire about visiting the AR2000 operation in California, contact us as soon as possible: the project work is scheduled for completion in August, 2010.

Martec’s Training Crew takes a break on site in New Delhi.

Training Project’s highlights:

Client: TERPL (Telcon Ecoroads Resurfaces Private Limited)

Machine: J2-AR2000

Training Period: January 17 2010 – February 27 2010

Project Name: Public Works Department – Zone M3

Location: New Delhi, India

Project Size: 58 lane kilometres

Hot-Milling Depth: 35-50mm

Corrective Ad-Mix: 20-35% (7.5% of 80/100 grade bitumen (VS10))

Rejuvenator: 0.15-0.4 L/sqm (SAVSOL Rejuvenating oil – ASTM D4552)
Designed as a front-end part of the real job which TERPL was responsible for as a contractor, the training program presented certain challenges for both TERPL and Martec because:

• The asphalt pavement being recycled during the training period was an overlay completed in 2000 which had a 4mm micro-surface completed in 2005.
• The existing asphalt pavement showed moderate rutting and layer separation due to improper construction techniques used by the previous contractor, i.e:
  • two of the six lanes were initially paved on a non-bituminous base,
  • the remaining four lanes were paved over a damp and dusty bituminous base with no tack coat.

With appropriate pre-engineering, QC/QA and a proficient local operating crew, TERPL recycled a sizable portion of the project during the period Martec’s training crew was on-site. Despite the challenging environment brought about by high traffic volume, urban operations, and low viability, TERPL excelled where other contractors could have faltered.

Browse through our Photo Gallery below to view the pictures of Martec’s Training Project in India.

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Peter’s Bros. Construction Ltd. – Martec’s long term customer and a partner in British Columbia, Canada – has received the prestigious 2009 Roads & Bridges/Asphalt Recycling and Reclaiming Association (ARRA) Award in Hot In-place Recycling category.

Peter’s Bros. has been the owner & operator of Martec’s AR2000 Super Recycler train for the past 15 years.  The company successfully recycled millions of square meters of deteriorated asphalt pavement in various regions of British Columbia but even for them a completion of a particular project last summer – the one that is now titled “HIR Project of the Year” – was a challenge.

Congratulations to Peter’s Bros. and gratitude to the ARRA for recognizing excellent results of the HIR technology application in British Columbia, Canada!

We are glad to share with our visitors an impressive description of Peter’s Bros. Construction Ltd.’s HIR Project of The Year as follows:

Martec delivered AR2000 to our new client EcoPavements S.A. de C.V. and trained their personnel in Mexicali, Mexico.

What is the typical Hot-In-Place Asphalt Recycling road candidate?

Alligator cracking

longitudinal cracking

low spots

the requirement for profiling

These are good candidates as long as the road has sound base and adequate drainage. A good candidate can be determined by the following:

Visual observation

Drill cores — check aggregate and oil content

Review records to determine the type of materials that were previously used to make original road

What is not an ideal candidate for Hot-In-Place Asphalt Recycling?

Excessive amounts of sub base failure

Thickness of less than 2” (50 mm)

Wide or excessively deep cracking

Poor or soft aggregates

Aggregates predominantly larger than ¾” (20 mm)

Low oil content — less than 4% (although this can be compensated for)

Stripping

Many recent projects that exhibited some of the above characteristics have been corrected with proper engineering and workmanship. Fix the excessive damage first!

Can Hot-In-Place Asphalt Recycling be used in cities where there are lots of turns, manholes, casting, water valves and curbs?

HIR used to be reserved for major highways, municipal roads and airports, but it is now being used more in the city. We provide minimal traffic delays and less congestion as typically only 1/5 of the asphalt trucks are required. With production rates as high as 1,400 sqm / hr we offer the perfect solution to a busy city.
Typically we accomplish 2 to 3 lane kilometers of rehabilitation work per day in the city. Our single lane process impresses the traveling public (which reflects well on the governments that chose this method).

Does the recycled road need to be overlaid?

No. The AR2000 produces asphalt of compressible or better quality than new asphalt although many of our competitors are forced to overlay their work due to the quality of asphalt produced by their machinery (typically due to age hardening of the bitumen caused by excessive heat or burning).

Does admix always have to be utilized?

Almost always. If the road has sunken or fallen 10% to 30% new asphalt is added to the recycled material to bring the road back up to grade. This creates a smoother road, and the road will have a higher load rating.

Can you recycle the road at night?

Yes, however production rates slow down because when the ambient air temperature is lower and much more care has to be taken with paving and compacting due to low light.

Does heating up the old asphalt in the road degrade the asphalt oil content?

By reheating the old oil in the road and adding a rejuvenating agent it will increase the quality of the old oil and in effect bring it back to life.

Do you have any other inquiries?

Please contact us.

Martec’s approach to road maintenance for sustainable pavements through hot in-place recycling technology – Mostafa Joharifard; Marina Kaplun; John Emery – 2005 International symposium on pavement recycling, São Paulo, Brazil – 2005

Advanced hot in-place recycling for cost effective maintenance of asphalt pavements – Stephen Q.S. Lee; Thomas E. Siddon – International Seminar on Highway Rehabilitation and Maintenance, New Delhi, India – 1999 Nov (PDF)

New developments in hot in-place recycling technology and specification – Stephen Q.S. Lee; Ronald L. Terrel; Michael A. Corbett – Forty-Third Annual Conference of Canadian Technical Asphalt Association, Vancouver, BC Canada – 1998 Nov (PDF)

Hot in-place Recycling of asphalt pavements – Experience in an
urban setting using new technology – Ronald L. Terrel; Stephen Q.S. Lee – Arab Urban Development Institute, Al-Ain, United Arab Emirates – 1997 Nov (PDF)

New developments in hot in-place recycling of asphalt pavements – Ronald L. Terrel; Jon A. Epps, James B. Sorenson – Pavement Session of the 1997 XIIIth IRF World Meeting, Toronto, Ontario Canada – 1997 (PDF)

Progress in hot in-place technology – Ronald L. Terrel; Jon A. Epps, James B. Sorenson – Construction Session of the 8th International Conference on Asphalt Pavements (ICAP), Seattle, WA USA – 1997 Aug (PDF)

Gaining acceptance is goal for HIR – Ronald L. Terrel; James B. Sorenson – Association of Asphalt Paving Technologists Symposium on Recycling of Asphalt Pavements in Salt Lake City – 1997 (PDF)

Artec International AR2000 Super Recycler – N.R.McCall & Associates, Environmental Consultants Ltd. – 1995 June(PDF)

Case Study Mississippi, USA – A. Crawley, Transportation Research Journal