“It is a beautiful thing when a Green solution is also the most cost effective solution.”
Michael J. Murdter P.E.,
Director Roads and Airports Department, County of Santa Clara
“This is very meaningful for us primarily because we do not have enough funds to take care of our roads. CIR is very successful in terms of quality, ease of construction and minimal impact on our community.”
Hans F. Larsen P.E.,
Director of Transportation, City of San Jose
“We are very committed to CIR and we want to close the loop on Recycling by your soon-to-be-deployed Cold Central Plant Recycling (CCPR) where we can utilize millings from our roads, which are currently going to dump sites and increasing our landfill, to be recycled and reused in our road projects.”
George M. Bolton III,
Construction Manager, County of Alameda Public Works Agency
“We liked CIR on our projects. It is fast and the minimal dust during construction is huge for us and our residents.”
Ashraf I. Shah,
Assistant Engineer, City of Foster City
It is a rehabilitation technique that reuses existing pavement material without the application of heat. It involves grinding off the top 2 to 6 inches of the existing asphalt surface, reclaimed asphalt pavement (RAP). The RAP is sized per design specifications, and mixed with a recycling agent and/or asphalt binder, before it is put down on the same road.
It is typically delivered via: multi-unit, using a “train” of equipment which includes an emulsion tanker, milling machine, sometimes a crusher and a screen, and an asphalt paver and a combination of pneumatic and vibratory rollers – because of the length of the train this process can be difficult on tight, curvy and narrow streets;
Or, a single-unit where the milling, mixing and placement of recycled asphalt is completed in a single machine similar to Wirtgen 3800CR. This single unit machine is suited for large roads as well as tight, curvy, and narrow roads.
Cold-In-Place Recycling (CIR) is becoming a popular method for rehabilitating asphalt roads.
We provide in-house Quality Control Testing and Inspection Services for all of our projects as part of our cold in-place recycling (CIR) services. We believe that owning the Quality Control testing procedures is a sure way to speed up turnaround time and address any defects immediately.
Towards that goal, we invested in customized mobile equipment a “laboratory on wheels,” and highly trained personnel that brings over ten (10) years of QA/QC experience working for well known engineering inspection firms.
Our mobile laboratory is California Department of Transportation, Caltrans Certified (certification #531), and enables us to deliver real time results allowing for a high degree of quality control.
We achieve this higher degree of quality control by decreasing the turnaround time of test results. Final Compaction test reports as well as material grain size distribution reports are available for review in real time, with strength verification reports available within 72 hours. This quick turnaround allows us to make real time, critical adjustments to our procedure to ensure the highest quality product available.
We are so committed to Quality Control that we routinely test at a higher than required frequency to ensure nothing goes unchecked.
In 2005 State of California Department of Transportation (CalTrans) awarded a CIR Project, contract no. 03-0A6004, on Highway 80 in Marysville – State Highway in Placer County 80 PM 14.3/33.3.
CalTrans went back nearly six years later, 2011, and conducted a study to evaluate CIR performance on this section of the highway.
The first CIR Project, according to The Federal Highway Administration, was completed in 1984 on Highway US 64 in New Mexico.
We own Wirtgen Cold Recyclers, model 3800CR Downcut with integrated Vögele screed. This is a single-train unit that pulverizes existing asphalt, to a maximum depth of six (6) inches, which is then mixed with an asphalt binder (oil) and water in the machine’s heavy-duty milling and mixing chamber to create a new mix. This mix is deposited back and spread uniformly across the entire width by the machine’s spreading auger, thus allowing the machine’s paving screed to place and compact in a single sweep.
With our 3800 CR machines, we can recycle curvy roads, busy intersections as well as wide-open roads without the “package” that snarls traffic and creates dust.