The leaders of the C&D recycling industry gathered in Brooklyn, NY - March 10-12 to hear an economic forecast for their industry, how to get and retain workers, and several materials specific sessions as part of C&D World 2019.
Using recycled aggregates for roadbuilding is the way of the future – time for many to catch up
On the path to building sustainable roads
Municipalities are responsible for the care and maintenance of vast amounts of roadway, from alleys to highways. When those roads are repaired or replaced, there's the potential to generate a significant amount of aggregate material - concrete and asphalt removed from the old surface that must be dealt with.
Today's roadbuilding contractors are using this recovered material and recycling it more than ever before. However, research is showing that some municipalities in Ontario are far better than others when it comes to using recycled aggregate in their roads - and some are far behind.
A study conducted on behalf of the Toronto and Area Road Builders Association (TARBA) has shown that Ontario municipalities are all over the map with respect to how much recycled material they use for road construction, with some almost entirely eschewing recycled aggregate - a greener alternative compared to virgin material - for their projects.
"There's not a huge commitment to recycling aggregate; in fact, there's a reticence to use the product," explained Rob Bradford, executive director of TARBA. "I think it stems from a fear of trying something new, thinking that something might happen - sticking with virgin aggregate has less potential for risk."
According to a study by a researcher from the University of Western Ontario, the allowable use of recycled aggregate across the region ranges from significant amounts in some large areas like Toronto, down to nearly none in nearby Mississauga. Instead, according to Bradford, millions of tonnes of material is either sent to the landfill or into stockpiles. At the same time, those low rates of use mean that new aggregate must be trucked significant distances, burning fuel and generating greenhouse gases, while used aggregate ends up in the waste stream.
Recycled aggregate means more sustainable infrastructure, overall, and Ontario municipalities should be doing a much better job - a much greener job - of recycling asphalt and concrete, Bradford noted. "They need to be a part of the solution, rather than part of the problem."
Focus on construction practices
The UWO study looked at construction practices in five regional municipalities and 15 single or lower-tier municipalities across Ontario, conducting a survey regarding approved uses of recycled aggregate for use in a variety of situations. Results of the survey showed a broad range of standards in both road construction and subdivision work.
For example, the collected responses showed that some 50 percent of surveyed municipalities do not allow the use of recycled concrete and asphalt as 55 mm aggregate for granular base and subbase for pavement. 40 percent allow partial use and 10 percent allow for full use. The municipalities are even more restrictive when it comes to 19 mm aggregate for granular pavement, with 55 percent not allowing recycled material, 35 percent okay with partial use and 10 percent allowing full use.Ready-mix concrete is the most restrictive use for these municipalities, with 80 percent not allowing recycled aggregate use and 20 percent allowing partial use.
On the other side, 50 percent of municipalities are okay with recycled aggregate being used for engineered fill, and 90 percent allow partial or full use for construction access roads, bicycle paths and similar construction.
Among individual cities, Toronto - the highest scoring municipality in the survey - allows recycled material for use in everything but engineered fill, stabilization of soft subgrades, Portland cement ready-mix, and in concrete for sidewalks, curbs and other uses within subdivisions. Some other uses are restricted, but for the most part full use is allowed.
"I'm really pleased to see that," Bradford said. "Sometimes there's an intent to do what's right, but it doesn't get down to the foot soldiers. If we have an issue in the city of Toronto, where virgin aggregate has been called for in a tender that should have some recycled material, we'll give them a call, and they address it."On the opposite end of the spectrum is Mississauga, which allows full use of recycled aggregate only for construction access roads, bicycle paths and similar features. No recycled product is allowed for any other road construction projects.
Perception and policy
Bradford suggested that much of the disapproval of recycled materials in municipal policy may come from lingering concerns about quality - something that has improved greatly with the growth of the aggregates recycling industry.
"You have to ensure the quality of recycled aggregate - it has to be an engineered quality, it has to be properly processed and tested. Like any material, going back 10 or 15 years there are probably a couple of things that have stuck in peoples' minds from when it was used in the infancy of the industry where it didn't work out because quality control wasn't what it should have been," Bradford said. "If you're a consultant working for a municipality, or you're an engineer in charge of the roads department, that kind of decision is a risk - so, you play it safe and just specify virgin aggregate."
This trend of specifying new material creates many issues for contractors who have to manage the aggregate removed from jobsites, Bradford noted.
"The owner just writes off ownership in the contract, so the contractor has to find a place to get rid of anything that comes off that project. Now, if they produce recycled aggregate themselves, they will take it to their yard and pile it up. If they don't, they have to find someone who does produce it. . . or dispose of it in the landfill," he said."The point we're reaching now is. . . there's so much of the stuff, they will have to start charging to take it in, and second they're going to have to turn people away."
Moving forwardTARBA is encouraging municipalities to find ways of using more recycled asphalt in their construction work. One example Bradford pointed to is the Ontario Ministry of Transportation, which currently uses 20 percent recycled materials in its highway construction.
"They've been very forthcoming about their commitment to reusing recycled aggregate. . . they're using tens of millions of tons a year. If you can put this material under highways that carry the amount of traffic that ours carry, then surely there's an argument for using it under a municipal street," Bradford said.
Only about seven percent of the aggregates used in Ontario currently come from recycled sources, as opposed to European countries which use up to 20 percent recycled product, Bradford noted. That's a goal he said TARBA would like to see municipalities aim for.
"We are encouraging municipalities to use the Ministry of Transportation model. If municipalities have the same attitude and the same practices as the MTO, we as a province would be recycling close to the levels that we should be, and which are supportable from a technical standpoint," Bradford said.
"There are Ontario provincial standards that look into the science behind this - what percentage of recycled aggregate you can use as a base course, or as a surface course, or on a bicycle trail. This has all been well figured out. We want municipalities to recycle the maximum allowable under the provincial specifications." RPN
This article was originally published in the January/February 2019 edition of Recycling Product News, Volume 27, Number 1.
More from C&D Recycling
The leaders of the C&D recycling industry gathered in Brooklyn, NY - March 10-12 to hear an economic forecast for their industry, how to get and retain workers, and several materials specific sessions as part of C&D World 2019.
Keestrack offers today the most versatile range of hybrid and plug-in solutions in mobile processing technology for quarrying and recycling applications. This applies to the complete product range, from screening plants and stockpile conveyors to mobile track-mounted crushing solutions of all relevant technologies and for all production capacities.
Terex Washing Systems (TWS) will present live washing demos of their game-changing AggWash 60 during bauma 2019. This showcase, in conjunction with their German distributors Kolsch and Christophel, is being hosted at Mittermeier (Kolsch customer site), located next to Hall FN 1024 / 1, April 8-14, 2019.
The new EC750E HR high-reach excavator from Volvo Construction Equipment offers exceptional reach, with a maximum pin height of 118 feet, and can also be easily reconfigured using extensions and different boom sets to become a multi-use demolition tool.
Brokk has introduced the Brokk 520D. Meeting both Tier 4 Final and Europe's Stage IV emission standards, Brokk says that the new machine is the most eco-friendly diesel demolition robot on the market. The 520D replaces the Brokk 400D, one of the first diesel models released, and comes equipped with Brokk's signature SmartConcept technology, boasting 40 percent more hitting power.
LBX Company has introduced two new models for the U.S. and Canada: the Link-Belt 250 X4 Material Handler (MH) and the 250 X4 Scrap Loader/handler (SL). Both feature an electronically-controlled 177 horsepower Isuzu engine that meets EPA Final Tier 4 requirements, without the need for a diesel particulate filter (DPF).
McCloskey to debut latest crushers, screens, stackers and washing plants on the world stage at bauma 2019
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Powerscreen is one of the world's leading providers of mobile crushing, screening and conveying equipment. Official distributors, Powerscreen of Canada will exhibit at the National Heavy Equipment Show in Toronto, from March 28-29th, 2019. Exhibiting at booth number 5004, experts will be on hand to talk crushing and screening and visitors will have the opportunity to get up close to a Powerscreen Chieftain 2200 screen.
Michael Gross, Zanker Recycling, San Jose CA, and Clarence "Jay" Giltz, Eagle Crusher, will be inducted into the C&D Hall of Fame, the industry's highest honor, at the Construction & Demolition Recycling Association's C&D World 2019, upcoming this March 10-12 in New York City.
2018 marked the most successful year to date for RUBBLE MASTER. With record sales and an export quota of 97% RUBBLE MASTER continues to hold their status as a market leader in Compact Crushing and Screening. The company says its continued success comes from higher product demand, healthy expansion in global markets, and new screening products.
ALLU Group will be exhibiting and demonstrating equipment from its Transformer, Processor and other equipment ranges at bauma 2019. As well as established and proven equipment, ALLU will be unveiling its latest developments, and launching new and exciting solutions.
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Rubicon Global, the Atlanta-based technology company that provides waste, recycling and smart city solutions to businesses and governments worldwide, has successfully diverted nearly 12 tons of waste destined for landfills from State Farm Arena during last week's festivities in Atlanta, Georgia. This waste was generated as a result of five events being held at the State Farm Arena leading up to and in support of the ‘Big Game.'
Ecowaste Industries operates the Ecowaste Landfill in Richmond, B.C. where they accept inert refuse, mainly from construction and demolition activities. This material is renewed into products such as compost, bark mulch and crushed concrete for sale. At the end of 2018, Ecowaste Industries Ltd. acquired the operating assets and facilities of Urban Wood Recycling and Smithers Enterprises, both based in Vancouver. The transaction was approved by both parties on November 21, 2018 and the sale closed on December 31, 2018. Since the start of the year, Ecowaste has been accepting Urban and Smithers customers at the Ecowaste Landfill in Richmond.
Brokk has introduced the Brokk 200, a new weight class of machine. The new model packs the power of a 3-ton Brokk machine into a 2-ton package. The Brokk 200 is one of four new next generation remote-controlled demolition machines Brokk showcased at World of Concrete 2019 in Las Vegas.
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On March 13th, 2019, Frontline Machinery is hosting their annual Crushing & Screening Equipment Demo Day. The largest of its kind in Canada, this special event brings together customers and stakeholders from the aggregate, C&D and civil construction industry for a live, hands-on demonstration of crushing, screening and stacking conveyor systems.
Terex Washing Systems (TWS) has announced further investment in their North American sales and operational teams that will enable customers to engage directly with TWS experts to discuss their requirements and collaborate in the development of innovative customer-specific solutions.
Cat multi-processors feature quick-change jaws, greater cutting/crushing forces, increased speed, durable design
Three new Cat MP332, MP345 and MP365 models are heavy-duty, high-production tools that accept multiple interchangeable jaws for taking on a variety of specialized demolition tasks. The new models, compared with previous models, can cycle 50 percent faster and generate up to 19 percent greater cutting/crushing forces. An innovative locking system enables a single operator to typically change jaw types in 15 minutes or less, using only standard hand tools. An included stand securely and stably holds unused jaw sets.
- Concrete Cutter: outer jaw cracks concrete, inner jaw shears steel
- Demolition: cracks thick concrete structures
- Pulverizer: crushes concrete, separates rebar
- Shear: cuts structural steel, pipe, cable
- Tank Shear: cleanly cuts tanks or plate steel at right angle on three sides
- Universal: cuts steel and crushes concrete
Metso is introducing new higher capacity models to its popular wheel-mounted Metso NW Rapid series. In addition to a bigger jaw crusher model, the NW Rapid units are now also available with a variety of robust cone crushers, including the first model with the MX crusher. Easily transportable using standard prime movers, over a thousand NW Rapid models have already been sold into aggregates and C&D recycling applications.
In 2017, McLanahan Corporation began a partnership with Anaconda Equipment of Northern Ireland to distribute and sell Anaconda's line of mobile track equipment. As the relationship between the two companies progressed, it became clear that their values and business styles were closely aligned. Today, the two companies are proud to announce that Anaconda Equipment will officially join McLanahan Corporation's family of companies upon legal closing within the next 30 to 60 days.
BossTek has updated its family of self-powered dust suppression equipment with Tier IV Final-compliant generators, ensuring compliance in all 50 states and Canada. BossTek made the announcement with the debut of the new DustBoss DB-60 Fusion, a field-proven suppression system driven by a high-reliability 25 HP electric motor and paired with a gen set powered by a heavy-duty 4-cycle indirect injection diesel engine. Designed, engineered and assembled in the USA, the generator features a dual-containment fuel cell, heavy gauge lockable enclosure and oversized brushless alternator for easy starting.
Okada America, Inc. and Rotar International BV have entered into a joint alliance of their demolition attachment businesses in the North American marketplace, effective January 1, 2019.
Multiple major manufacturers of horizontal grinders have released new models in 2018. HOGS, as they are sometimes called (HOrizontal GrinderS), are unquestionably the workhorse of the wood recycling industry and are a key piece of equipment for composters, land clearing contractors and biomass-for-energy producers, as well as C&D and MSW processors, where in both cases, wood and other organics are part of a mixed stream of materials. The latest model horizontal grinders feature lighter weights with higher production, increased transportability and site mobility, diesel, hybrid and fully electric power options, along with sophisticated controls systems, and ease of use and maintenance for operators and owners. This article looks at the latest horizontal grinder models and updates from Morbark, CW Mill, Rotochopper, CBI, Diamond Z, Bandit, Vermeer, Precision Husky, and Peterson Pacific.
McCloskey held its first multi-spread demonstration event, at King Bros. Quarry in Co. Armagh, Northern Ireland, on Thursday, November 1, highlighting the power of their equipment working together. The demonstrations were an integral part of events tailored to familiarize both new and established dealers with the versatility and productivity of McCloskey's latest products
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EvoQuip made an impact on the US market with a successful Open Event on November 8th 2018. Over 100 dealers and new and existing customers made the trip to Cave City, Kentucky to see live working demonstrations of the compact crushing and screening range.
Haver & Boecker has launched the Tyler F-Class portable plant that includes several new technologies to improve setup time and extend equipment longevity in quarry and mining operations. The portable plant features a new custom-built chassis equipped with six hydraulic run-on jacks that quickly level the plant, eliminating the need for cribbing. The run-on jacks also ensure the chassis stays level during operation, which minimizes equipment wear.
Terex MPS welcomed over 80 distributors to their highly successful Americas Distributor Conference and Equipment Expo in Oklahoma City from October 15 to 18 2018.
Superior Industries Inc., a U.S. based manufacturer and global supplier of bulk material processing and handling systems, says it's ready to debut two new tracked conveyor models. Joining the manufacturer's top-selling line of portable conveying solutions are a 75-foot (23m) tracked stacker and an 8-by-16-foot (2.4 x 4.9m) tracked feed hopper.
Delegates from all over the world joined together at the inaugural Circular Driven Economy Symposium in London on the 18th - 19th September, to learn more about the opportunities in recovered construction and demolition waste material (C&D waste). Speakers from research bodies like SINTEF, academic institutions like Queen's University Belfast, construction and manufacturing firms like LafargeHolcim and Mapei, and the European Commission all provided plenty for delegates to think about.
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LBX Company LLC, makers of Link-Belt excavators, forestry machines, demolition and scrap/material handling equipment, recently announced the opening of an Equipment Sales and Service Limited (ESS) branch in Calgary, Alberta. ESS has been a Link-Belt excavators dealer since September 1978.
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The capabilities of ALLU'srange of Processors and Transformers will be on display at bauma China 2018, Stand A19. As the largest trade show in Asia, bauma China will set the stage for ALLU to show first-hand how its equipment can help construction companies maximise their business, whatever the application.
Morbark hosts 12th Demo Days, debuting new 23X Chiparvestor and showing latest grinders and chippers
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McCloskey has taken the next big step in its industry leading designs by adding the groundbreaking new All-Terrain Stackers to its line-up. Blending the benefits of onsite track mobility with the high productivity of a radial conveyor, the All-Terrain Stackers allow the conveyor to switch from track mode to radial in seconds.
CDE Global has landed in Texas, with big plans for the North American screening and washing marketplace. The Northern Ireland-based manufacturer of washing plants for aggregates, recycling and mining operations marked the grand opening of its new North American headquarters in Cleburne, Texas with a celebration for staff and customers.