SciTechBlog   « Back to Blog Main
September 19, 2008

Concrete Solutions

Posted: 12:13 PM ET

Hard, flat, tough, solid. These are all words that you could use to describe concrete. But green? That’s not usually an adjective many people would apply to cement – unless, of course, they knocked over a can of emerald paint on their driveway… But here’s a rundown of some new environmentally friendly products that are paving the way to greener, well, pavement.

Workers lay Filtercrete (left) and Flexi-Pave (right) instead of regular concrete. Source: CNN/KBI


Filtercrete:
Recently used to green Chicago’s alleys (watch story here), Filtercrete is one of a few products that help improve normal pavement by making it porous. It is filled with tiny holes that allow water and air to flow between the surface and the soil. This reduces the runoff to local waterways, while increasing water input to local underground aquifers. Because water is less likely to be trapped in the porous concrete, there is a reduction in cracks caused by water freezing to ice. Filtercrete’s holes also harbor bacteria that break down contaminants like oil and grease, so water is cleaned as it passes into the ground.

Flexi-Pave: KB Industries’ flagship product Flexi-Pave adds one more green aspect to porous pavement. Used for ‘low-speed’ surfaces like sidewalks, trails, and parking lots, Flexi-Pave is made primarily of recycled tires. Considering they are used at a rate of one per person per year, there are a lot of worn-out rubber tires out there that could be diverted from landfills and recycled into pavement.

Because it’s made of rubber, Filterpave can expand with any freezing water that happens to be caught in the product’s pores, further reducing the chance of cracking. Also, the product can be outfitted with subsurface heated water pipes to help melt snow lying on the pavement’s surface. “[It] causes any snow to immediately turn to water and pass through the product,” says Chief Operating Officer Trey Wylie, “[Clients] have eliminated snow removal costs and no longer have to apply chemicals throughout the winter.”

Air-Purifying Concrete: It’s still in the research stage, but scientists at the University of Twente in the Netherlands are developing a form of concrete that could help clear nitrogen oxides from the air. Nitrogen oxides are those chemicals that cause problems like smog and acid rain, but this new concrete will contain a chemical – titanium dioxide – that converts nitrogen oxides into harmless nitrate salts.

The salts are rinsed off the surface and into drainage systems when it rains, and the concrete should continue to perform over time. “[Titanium dioxide] is a catalyst, so it is enabling the reaction, but not participating, not consumed, so it never wears out,” says researcher Jos Brouwers. He adds that the air-purifying concrete could potentially be combined with porous concrete products like those mentioned above or even used in decorative facades of buildings. Results on how effectively the concrete performs in field tests are expected in 2009.

So what do you think of these products? Where can green pavement go from here?

Julia Griffin, CNN Science & Technology

Filed under: Cars • environment • Materials • recycling • Tires


Share this on:
totRearorbtem   May 24th, 2021 10:41 pm ET

cialis tadalafil [url=https://apcalisetadalafil.com/ ]where to buy cialis without prescription [/url] cheap cialis pills for sale tadalafil without a doctor prescription where to buy tadalafil on line


totRearorbtem   May 25th, 2021 12:28 am ET

tadalafil online with out prescription tadalafil dosage best price usa tadalafil tadalafil liquid https://cttadalafil.com/


brimonidine   May 25th, 2021 2:43 am ET

buy brimonidine brimonidine tartrate ophthalmic


trouctWonfurn   May 25th, 2021 9:51 am ET

tadalafil liquid https://tadalafilww.com/ prescription tadalafil online generic cialis tadalafil where to buy generic cialis online safely


trouctWonfurn   May 26th, 2021 3:48 am ET

cost of cialis tadalafil blood pressure tadalafil generic where to buy tadalafil brands [url=https://tadalafilol.com/ ]cheapest tadalafil cost [/url]


totRearorbtem   May 26th, 2021 4:17 am ET

tadalafil without a doctor prescription tadalafil liquid cost of cialis tadalafil generic [url=https://apcalisetadalafil.com/ ]tadalafil liquid [/url]


avanafil   May 26th, 2021 4:27 am ET

avanafil cost avanafil buy


totRearorbtem   May 26th, 2021 5:42 am ET

cialis at canadian pharmacy [url=https://cttadalafil.com/ ]tadalafil daily online [/url] cialis cost tadalafil generic where to buy https://tadalafilol.com/


brimonidine   May 26th, 2021 7:25 pm ET

brimonidine tartrate 2% combigan side effects


Fuernitidatrith   May 27th, 2021 12:26 am ET

tadalafil order online no prescription buy tadalafil where to buy cialis without prescription buy tadalafil [url=https://tadalafilww.com/ ]cialis at canadian pharmacy [/url]


NattFesSsally   May 27th, 2021 12:26 am ET

generic tadalafil from uk tadalafil online buy cialis pills https://tadagatadalafil.com/


trouctWonfurn   May 27th, 2021 3:56 am ET

buy tadalis [url=https://tadalafilww.com/ ]cost tadalafil generic [/url] buy cialis pills tadalafil daily online buy tadalis


totRearorbtem   May 27th, 2021 6:10 am ET

tadalafil blood pressure buy tadalis where to buy cialis without prescription https://tadagatadalafil.com/


Fuernitidatrith   May 27th, 2021 5:03 pm ET

cheap cialis pills for sale https://tadalafilww.com/ tadalafil side effects tadalafil cost walmart side effects for tadalafil


Tari Lucik   June 4th, 2021 3:20 am ET

This was awesome! I would like you to clean up all this spam though

https://www.linkedin.com/in/yusufhanafy


cialis 20 mg   June 4th, 2021 11:47 am ET

tadalafil price at walmart cialis tadalafil medication


serment d'hippocrate   June 4th, 2021 9:11 pm ET

chlorquine leflunomide premature babies wikipedia


interactions for hydroxychloroquine   June 5th, 2021 11:58 am ET

chlorquine cure for covid 19 chloroquina


cialis 20 mg   June 5th, 2021 12:39 pm ET

tadalafil from india reviews cialis 20mg research chemicals tadalafil


tadalafil dosage bodybuilding   June 5th, 2021 2:24 pm ET

how long does tadalafil last tadalafil liquid tadalafil dosage


tadalafil pah   June 5th, 2021 6:21 pm ET

tadalafil dosage bodybuilding tadalafil liquid sublingual tadalafil


tadalafil online with out prescription   June 6th, 2021 10:12 pm ET

tadalista 20mg cialis at canadian pharmacy intimate medicine


Wilfred Housholder   June 7th, 2021 8:29 am ET

This was great! I would like you to clean up all this spam though

https://www.linkedin.com/in/yusufhanafy


tadalafil online   June 7th, 2021 3:20 pm ET

tadalafil tablets 5mg tadalafil daily online tadacip 20mg


chloroquine side effects   June 8th, 2021 3:11 am ET

what is in hydroxychloroquine hydroxychloroquine plaquenil drug class


Jose Dose   June 11th, 2021 11:43 pm ET

This was awesome! I would like you to clean up all this spam though

https://www.linkedin.com/in/yusufhanafy


Bobby Mulrenin   June 12th, 2021 5:39 pm ET

Have you ever heard of second life (sl for short). It is basically a game where you can do anything you want. Second life is literally my second life (pun intended lol). If you would like to see more you can see these sl websites and blogs

http://thisteachinglife.blogspot.com/2007/04/rise-of-teachers-blogs.html


Vi Rishe   June 13th, 2021 4:11 am ET

I don't know about you guys but I am obsessed with airplanes. I had a friend in highschool that loved airplanes, so here are some airplane related stuff I don't know about you guys but I love airplanes. I had a friend in highschool that loved airplanes, so here are some airplane related stuff https://www.airlinereporter.com/2009/05/are-new-airport-millimeter-wave-scanners-going-too-far/

http://urlm.co/g/c/f/163870


Jesusita Shelor   June 13th, 2021 6:43 pm ET

I don't know about you people but I infatuated with airplanes. I had a friend in highschool that loves airplanes, so here are some airplane related stuff I don't know about you guys but I love airplanes. I had a friend in highschool that loved airplanes, so here are some airplane related stuff https://www.airlinereporter.com/2010/03/airline-livery-of-the-week-croatia-airlines/

http://badinfluencesblog.blogspot.com/2010/07/


Robt Stickels   June 15th, 2021 5:04 am ET

Have you ever heard of second life (sl for short). It is basically a online game where you can do anything you want. sl is literally my second life (pun intended lol). If you would like to see more you can see these second life authors and blogs

http://rumblingstrips.blogspot.com/2007/11/procrastination-flow-chart.html


pharmaceptica.com   June 21st, 2021 6:36 pm ET

where to buy sildenafil canada https://pharmaceptica.com/


Echo Ajani   June 21st, 2021 6:38 pm ET

Have you ever heard of second life (sl for short). It is essentially a online game where you can do anything you want. sl is literally my second life (pun intended lol). If you would like to see more you can see these second life authors and blogs

http://adolit.blogspot.com/2008/07/real-cost-of-prisons-project-comics.html


pharmaceptica   June 21st, 2021 6:41 pm ET

research chemicals tadalafil https://pharmaceptica.com/


www.pharmaceptica.com   June 24th, 2021 1:17 pm ET

is erectile dysfunction dangerous https://www.pharmaceptica.com/


pharmaceptica   June 26th, 2021 12:58 am ET

hcqs 400 https://pharmaceptica.com/


pharmacepticacom   June 26th, 2021 10:19 pm ET

hydroxycloraquine https://www.pharmaceptica.com/


pharmaceptica   June 28th, 2021 11:39 pm ET

heart rate watch walmart https://pharmaceptica.com/


pharmaceptica.com   June 29th, 2021 1:59 pm ET

hcq drug https://www.pharmaceptica.com/


Leave Your Comment


 

CNN welcomes a lively and courteous discussion as long as you follow the Rules of Conduct set forth in our Terms of Service. Comments are not pre-screened before they post. You agree that anything you post may be used, along with your name and profile picture, in accordance with our Privacy Policy and the license you have granted pursuant to our Terms of Service.


subscribe RSS Icon
About this blog

Are you a gadgethead? Do you spend hours a day online? Or are you just curious about how technology impacts your life? In this digital age, it's increasingly important to be fluent, or at least familiar, with the big tech trends. From gadgets to Google, smartphones to social media, this blog will help keep you informed.

subscribe RSS Icon
twitter
Powered by WordPress.com VIP