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Part Two – We Built This Green City

Part One Was Subterranean, Now In Part Two, We Break The Green Surface.



There’s a cool little bounce to the sidewalks of New Green City, that’s because these sidewalks are made of recycled rubber, composed entirely of old tires. Sidewalks that are safer and more flexible so no breaking apart as tree roots grow (like concrete notoriously does). They are able to be installed directly over and mold around tree trunks and roots while still allowing water to penetrate to the roots without damaging them or hindering growth. Rubber sidewalks curve around corners and even down slopes, gum doesn’t stick to it, cigarettes won’t leave burn marks and it’s easy to remove and replace.

Currently, the material is about 30% more expensive than concrete, but it lasts three times longer and does not have the carbon footprint as does the production of concrete.

New Green City utilizes recycled concrete in a myriad of ways, so much so that it is now completely unnecessary to toss any of the broken and discarded concrete that normally (by the tons), ends up in over-taxed landfills. Old broken concrete is repurposed and used like stone, popularly called “urbanite” for flower beds, landscaping gravel, paths and aggregate blends for patios, fire-pits, planters, and retaining walls. While broken pieces of concrete make good stepping stone walkways. Recycled concrete has become a staple in the manufacture and/or construction of counter-tops, sinks, pool decks, interior walls, floors, and even furniture.

To cut costs and improve overall quality of street and airport repairs and overlays, New Green City utilizes E-Krete , an extremely durable polymer composite micro-overlay (PCMO™) that bonds securely to asphalt pavement, chip seal, polished stone and other bituminous products, as well as concrete and primed metal. It is unaffected by water, UV, ice, oxidation, automotive fluids, aircraft fluids, oil, diesel and gasoline. Cracks in oxidized pavement are filled by the PCMO material as old asphalt pavement is capped with a 1/8-inch (3.17 mm) lift of E-Krete in contrast to overlaying with 1.5 inches (38.1 mm) of asphalt. E-Krete is a high-albedo pavement (a lighter-colored surface that reflects sunlight energy instead of absorbing it), staying cool on hot days and thereby reducing the “urban heat island effect”. Which is the condition where dense urban areas become several degrees warmer due to the density and the amount of buildings and heat absorbing paved areas, which contributes significantly to climate change.

Also asphalt contains suspected human carcinogens and its dark surface creates a nighttime illumination problem. Where as E-Krete’s enhanced illumination reduces heat by as much as 12 °F (8 °C), compared to the heat absorption of asphalt. Meaning that overlaying with E-Krete essentially turns asphalt into a “green” product. And cheaply too because for regular asphalt overlaying the cost is $7.29/square yard (€ 5.18 /0.83 square meter) and lasts approx. 8 years compared to E-Krete which is $5.85/square yard (€ 4.15/0.83 square meter) and can last 20 years, saving millions of tax dollars. With no VOC’s (Volatile Organic Compounds) it is completely environmentally friendly, so much so that PolyCon Manufacturing, the company that created and manufactures E-Krete said, “you can even drink the water that comes off the top of it”. At this time it is the only cementitious pavement preservation material approved by the FAA, EPA, Army Corp of Engineers.

For beautiful side streets, residential roadways, and unpaved/non-maintained roads, New Green City acquires the Tiger-Stone machine from Vanku Machinebouw (machine construction), from Brabantine Gilze-Rijen, the Netherlands. An electric powered, gravity employing ballasting machine crawling along a sand base accurately laying sustainable, perfectly aligned, curb to curb, beautiful, instant brick/paver road at an astounding 400 square meters (1,312 sq. ft.), a day.

The width span can be adjusted up to 6 meters (19.68 feet) wide. Brick roads have been road/street building material for centuries and pavers of one sort or another have been building roads for around 2,000 years or so. Brick/paver roads had fallen out of favor because they were so back-breaking labor and time intensive. But since the dawn of the green building movement and Tiger-Stone, they are back. Bricks and pavers are easy to manufacture, reuse (a biggie), last an extremely long time, virtually maintenance free, and they are easily replaced in case of damage. They absorb rainwater between their seams helping renew aquifers and reducing storm water runoff. They can take intense heat, rain, snow, and freezing without cracking and the damage that leds to the potholes we’ve all come to know and loathe. The cost for the machine is from $85,27 (€ 60,000) to $113,696 (€ 80,000).

Another plus is that New Green City uses air-purifying paving stones in it’s Tiger-Stone machine. These concrete stones and their poured concrete cousin, contains titanium dioxide, a photocatalytic material that removes the nitrogen oxides from the air and converts them with the aid of sunlight into harmless nitrate. The nitrate is then rinsed away by rain. These stones also have another advantage, they break down algae and dirt, so they always stay clean. Scientists at Eindhoven University of Technology in the Netherlands developed this paving material that actually eats pollution and it has become a crucial tool for keeping the air quality in New Green City as fresh as it is after a spring rain.

Solar Roadways’ ingenious and multi-functional Solar Road Panels are utilized on all the major freeways and interstate highways passing around and through New Green City. As well as commuter park-and-ride lots, and interlaced with pavers on downtown streets in an functional yet aesthetically appealing manner. Each energy-generating panel linking together to provide a network of power and communications distribution.

The embedded LEDs in each panel of the road groups together to “paint” the travel lines and lane markers from beneath to provide safer nighttime driving, as well as to give up to the minute instructions to drivers (i.e. “detour ahead”). The road will be able to sense wildlife and can warn drivers to “slow down”. The embedded heating elements prevent snow and ice buildup, providing for safer winter driving and alleviating the expense of snow removal and the environmental problems caused by the chemicals (salt, magnesium chloride, etc.) currently used to maintain clear roads. And to prevent snow and ice buildup on the the adjacent downtown sidewalks, the panels also feed power to radiant heating cable systems installed under the pavers during the process of widening the sidewalks to encourage and accommodate more foot traffic.

Stay tuned for Part Three – Up From The Surface …as the green future unfolds.

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3 Responses to “Part Two – We Built This Green City”

  1. Alan Says:

    Wow that is smothing multi-functional Solar Road Panels are utilized on all the major freeways and interstate highways passing around and through New Green City. Are they in Atlanta?

  2. Linda Says:

    Hi Alan … yes Soar Roadway’s solar panels are amazing and no I don’t believe they are in Atlanta – yet. The company is waiting the second round of funding from th U.S. Depart. of Transportation to make a practical prototype in a driveway or parking lot. This prototype will be used to power a micro-infrastructure for proof-of-concept and to monitor/evolve potential snags and unforeseen accidents in design and/or functionality.

  3. McKenzie Says:

    This is so great! Finding recycled alternatives for things like sidewalks is amazing. Thanks for sharing all of these advances!

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