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:
Garry Minor   September 19th, 2008 1:03 pm ET

HEMPCRETE!!!

COMBINING HEMP HURDS, LIME, SAND, SOME CEMENT, AND A LITTLE WATER GIVES YOU A MATERIAL SEVEN TIMES STRONGER, HALF AS LIGHT, AND THREE TIMES MORE ELASTIC THAN CONCRETE. IN FACT THERE IS A SIXTH CENTURY BRIDGE IN FRANCE STILL STANDING THAT GIVES TESTIMONY TO THE DURABILITY OF THIS ANCIENT BUILDING MATERIAL!
ANYTHING MADE FROM OIL, COAL, TIMBER, OR COTTON CAN BE MADE ECOLOGICALLY FRIENDLY WITH HEMP! ALL PAPER, PLASTICS, PAINTS, VARNISHES, FUELS, LUBRICANTS, TEXTILES, INSULATIONS, PLYWOOD, STRUCTURAL COMPONENTS, MANY HEALTH FOODS, COSMETICS, AND MEDICINES, OVER 25,000 KNOWN PRODUCTS CAN BE MADE WITH IT!


S Callahan   September 19th, 2008 1:20 pm ET

Wow Julia..great article. Being a severe asthmatic very sensitive to the enviroment I would love to advocate to my city for the air purify concrete. Curious question, what happens to the salts that drain off?

PD. I see that CNN acnowledged through a posted TIME article by M.J. Stephey that CERN is locking at the spiritual aspect of life (consciousness after body stops). As well, other articles telling of the breakdown and now repair of CERN that is set to go again. Can we hear more of the two stories through blogs?


Franko   September 19th, 2008 4:53 pm ET

Fascinating are all the new materials, some from waste products.
Epoxy concrete, sanded to make extremely durable items.
Shopping mall sidewalks, fountains, specialized concrete.
Particle board, cheap compared to plywood. Some amazing paints.


Patrick   September 19th, 2008 5:16 pm ET

These all sound like wonderful products but, if I am a developer, school, or a municipality that wants to build green, the most important items I would want to know first:
1. Initial cost premium if any.
2. Durability and maintenance cost premiums if any.
3. Quality and performance compared to normal hard suface material.

If all of these criteria are satisfied, the product is a worthwhile investment.


Jason   September 19th, 2008 6:14 pm ET

Two problems I see.

1. Air purifying concrete uses titanium dioxide. Titanium dioxide is acquired through mining. Those who are truly green would consider mining a big no-no. Trying to be green is an unattainable fantasy that weakens economies and lowers the standard of living.

2. Porous Concrete. The transition between fall and winter and winter and spring in areas that have snow and ice will provide ample opportunity for water to become frozen as temperatures dip at night. The freezing and unfreezing during these periods inside the porous cavities will cause the concrete to break apart.


Big Foot   September 20th, 2008 2:31 am ET

Just checking. No conspiracy theory postings yet? Or is the media censoring them? 🙂


Franko   September 20th, 2008 4:14 am ET

"porous concrete is a form of concrete which is permeable, rather than solid. Porous concrete is made by mixing large aggregate material with mortar, creating lots of voids in the cast concrete"

Large surface area. Low in strength, special effects for special places. Tradeoff weakness for adwantages. Still need grawel bed, drainhole for downpour.

"Concrete Solutions" - Water is a solwent, dissolwing, lifetime reducing.
Increase lifetime, special insoluble binder, instead of plain mortar ?


S Callahan   September 20th, 2008 10:22 am ET

Julia i love this article but Still waiting for a Haldron blog to go up.
I see CNN reported today that CERN is out of commission for at least two months...how about some more info...like the truth of what really went wrong, still going wrong...the Scientists know....remember, to give credience to our God..this time it was mercy...


Franko   September 20th, 2008 5:56 pm ET

Porous concrete has similarities to sponge foam, metal, glass, rubber, or plastic
Warious mixing possibilities, ewen plastic washable filter in your air cleaner.

Closed cell structures, such as styrafoam and astrogel make good insulators
Composite building materials, optimized to fill the design need.


Brian, Detroit, MI   September 21st, 2008 5:37 am ET

Sounds like a good idea.


Tom from Vienna   September 21st, 2008 8:02 am ET

The porous concrete will be destroyed in the first "freezing rain" weather due to the water freezing in the pores before it has a chance to pass through.

And porous concrete may look good on a level area, But, on uneven terrain (most on the earth), the movement of water over concrete prevents the slow errosion of the ground beneath. Porous concrete roads will shift downhill over time faster than normal concrete.

If scientists and environmentalists want to work on better roads, consider replacing black asphalt with something that reflects sunlight rather than absorbing it as heat.


Franko   September 21st, 2008 9:58 pm ET

Large particle aggregate, insufficient binder to fill the gaps.
Passes water, untill gets clogged up. The plumber has miniature plunger ?

Bumpy, badly scrape your kneecaps on a permeable tennis court. Not for disabled or high density commercial traffic. Too complex to mix for the average Henry the Handyman. Somewhere in between high maintenance useful.


Andrew   September 21st, 2008 11:49 pm ET

There were tests done on the porous concrete in Wisconsin. Freezing was indeed a concern. However, some of that stuff has been laid down for 4 years of freeze-thaw cycles and is pretty much undamaged. One reason for this could be that the holes do not completely fill with water, allowing some compliance when freezing/thawing occurs. However, the designers did consider this, and had suggested this stuff would perhaps work better where it doesn't get too cold.


Dan Hassett   September 22nd, 2008 11:14 am ET

Note to editor: In the 4th graf, you call it "Filterpave" when it should be "Flexi-Pave" - unless I missed something.


teenager in skool   September 22nd, 2008 11:54 am ET

i think that that is sme cool concrete they should use it all over the world especially here where out economy is slowly crashing. oh well we will get back on out feet eventually. 😀


KLF   September 22nd, 2008 12:00 pm ET

Holy cow, what a bunch of nay-sayers...

FYI... porous/pervious concrete has been in use for several years with great success. Read about it:

http://stormh2o.com/september-2008/pervious-asphalt-concrete.aspx


Nay-sayer   September 22nd, 2008 5:08 pm ET

Porous/pervious concrete has been used for several years now. One of the problems that has been encountered is that along with water getting back into the system, so do unwanted contaminates (e.g. oil from the roads). Regardless, permeability rates vary greatly depending on the volume of discharge (rain). May be we should make our cities denser and leave the country side as country.


Franko   September 22nd, 2008 11:10 pm ET

In your living room. Suck up dirt to a centralized vacum system. Add heating, cooling, perfume, negative ions, humidity controls. What way to control cat fleas.


Bill (Raleigh, NC)   September 23rd, 2008 10:01 am ET

Regardless of the performance of these particular products, it's great that teams around the world are innovating in all areas of human endeavor to preserve our planet and increase the quality of life for its inhabitants. It's a sure bet that we'll be in deep trouble if no one is trying to make a difference in these areas. It takes many projects like these to create successful products that can make a difference. This is how it's done, folks. To throw stones at that intent is just weird. Three cheers for these innovators!


Franko   September 23rd, 2008 12:51 pm ET

A material that needs extra care in preparation, application, and maintenance
Special effects, under certain conditions,, can outlast ordinary concrete.

Mixing ordinary concrete for the application, I can do.
Try a small porous batch ? will have to really think hard


info on greener concrete |   September 24th, 2008 8:32 am ET

[...] http://scitech.blogs.cnn.com/2008/09/19/concrete-solutions/ Filled under: Building materials | You can follow any responses to this entry through the RSS 2.0 feed. [...]


smoky   September 25th, 2008 1:43 pm ET

Yeah, people! What about cat fleas! We need a concrete solution to cat fleas NOW!


Franko   September 26th, 2008 1:27 pm ET

smoky: you miss the EcoReCyclePossible
Collect the fleas, feed to goldfish, cat likes live fish, more fleas


Gen Utopia   September 27th, 2008 8:48 pm ET

I once had an eco-nut roommate that refused to put a flea collar on his cat. There were so many fleas in my house they infested my front lawn and came back to haunt me after he left, every summer for three years.

Please put a flea collar on your cat.

Has anyone ever solar fired concrete?

I'd imagine titanium-oxide would be too expensive to use as a building material, unless it provided structural strength advantages as well as filtered the buildings air. If it only filters the air that blows by the building and provides no strength, I can't see anyone ever coughing up the cash for it.

Maybe its possible to convert these polluting oxides into harmless salts using a metal or mineral that is less expensive than titanium.

Or is titanium onlly expensive because it takes a lot of energy to smet? (maybe we could solar fire titanium...)


Gen Utopia   September 27th, 2008 8:53 pm ET

Smet? (I meant smelt of course)

A third possible advantage of air-cleaning concrete may be that it prevents corrosion of the building and thus increases its expected life-span.


johnell deloach   September 27th, 2008 9:31 pm ET

wow i am feeling this new concrete that they have on the market especailly for the snow


bigger picture   September 29th, 2008 11:23 am ET

Good to get the ideas out there, but there are many limitations with porous pavements, especially from particles filling in the small holes.

See, e.g.: http://www.stormwatercenter.net/Assorted%20Fact%20Sheets/Tool6_Stormwater_Practices/Infiltration%20Practice/Porous%20Pavement.htm

Re: the pavement releasing nitrogen, to waste water, this sounds risky, as can lead to algal blooms in open water. Info, e.g. at : http://www.cbf.org/site/News2?abbr=SB_VA_&page=NewsArticle&id=36249


Fred Thompson   December 9th, 2010 3:03 pm ET

I have seen flexi-pave in Syracuse, NY . It looks great and holds up to all the snow they get. Theres a park down the street that has it and in the winter the snow melts faster than on the concrete walks


qwetrader   February 5th, 2011 1:12 pm ET

This is great information. Thanks for sharing.


ice melt antarctica   April 27th, 2012 1:30 pm ET

Keep up the wonderful work , I read few articles on this internet site and I conceive that your weblog is really interesting and holds lots of wonderful info .


snowmelt system design   May 1st, 2012 7:35 am ET

You could definitely see your enthusiasm within the work you write. The sector hopes for more passionate writers such as you who aren't afraid to say how they believe. All the time follow your heart. "If the grass is greener in the other fellow's yard – let him worry about cutting it." by Fred Allen.


yosemite snow melt 2012   May 1st, 2012 7:52 am ET

Great � I should definitely pronounce, impressed with your site. I had no trouble navigating through all tabs and related info ended up being truly simple to do to access. I recently found what I hoped for before you know it at all. Quite unusual. Is likely to appreciate it for those who add forums or anything, website theme . a tones way for your client to communicate. Excellent task.


wajhi627   December 28th, 2016 4:46 am ET

Very Nice Infomration Concrete Mix Design


Omar Licudine   December 9th, 2020 8:33 pm ET

Get best traffic software, that automatizes your adverting plan for your business. Get millions of visitors to your website with best traffic bots. Don't waste your money in low quality bots anymore. HighTicket Hijack PRO Software. Click in my profile name for more details.

https://bit.ly/33KOy2O


detectives privados alcalá de guadeira   December 10th, 2020 4:15 pm ET

detectives privados merida

https://www.argadetectives.com/boadilla-del-monte.html


bitcoin to paypal   December 15th, 2020 8:15 pm ET

Transfer from bitcoin to paypal very fast and low cost.

https://exchanger24.org/xchange_btc_to_ppusd/


Marisa Rudkin   December 20th, 2020 4:04 pm ET

I do not even know how I stopped up here, however I believed this post used to be great. I do not recognize who you are but certainly you’re going to a well-known blogger should you are not already Cheers!

http://6dollarmillion.xyz


Lacy Kreiter   December 21st, 2020 8:19 pm ET

I simply couldn't go away your site before suggesting that I extremely enjoyed the standard info a person provide in your guests? Is gonna be back ceaselessly in order to investigate cross-check new posts

http://google.sk/url?q=https://youtu.be/DYISRjtfuRU


Christa Kortkamp   December 24th, 2020 1:37 am ET

Hey! I know this is kind of off topic but I was wondering if you knew where I could locate a captcha plugin for my comment form? I'm using the same blog platform as yours and I'm having trouble finding one? Thanks a lot!

https://cli.re/testoultra-asf


Antonia Schurkamp   December 24th, 2020 9:09 am ET

Admiring the hard work you put into your site and in depth information you present. It's nice to come across a blog every once in a while that isn't the same outdated rehashed information. Excellent read! I've bookmarked your site and I'm adding your RSS feeds to my Google account.

https://cli.re/reduslim-de


Fausto Chaplean   December 24th, 2020 10:34 am ET

As a Newbie, I am constantly searching online for articles that can benefit me. Thank you

http://maps.google.de/url?q=https://youtu.be/RlcvPsjXbJY


Santana Dovel   December 27th, 2020 5:50 pm ET

Very good blog! Do you have any hints for aspiring writers? I'm hoping to start my own site soon but I'm a little lost on everything. Would you suggest starting with a free platform like WordPress or go for a paid option? There are so many options out there that I'm completely confused .. Any recommendations? Kudos!

http://wideopenworld.com/__media__/js/netsoltrademark.php?d=gumroad.com/ketolightplus/p/revision-de-keto-light-plus-suplemento-natural-basado-en-la-dieta-keto


Levi Gravelle   December 28th, 2020 12:21 am ET

Hey there! I know this is kinda off topic however I'd figured I'd ask. Would you be interested in trading links or maybe guest authoring a blog article or vice-versa? My site covers a lot of the same subjects as yours and I believe we could greatly benefit from each other. If you happen to be interested feel free to send me an e-mail. I look forward to hearing from you! Wonderful blog by the way!

http://faduaemex.org/__media__/js/netsoltrademark.php?d=gumroad.com/matchaslimes/p/matcha-slim-nazory-cena-kde-kupit-vlastnosti-a-vyhody-45122ea4-f720-4a34-8375-5c36e859dd54


Jewell Scheiber   January 11th, 2021 12:40 am ET

Wow! This can be one particular of the most useful blogs We have ever arrive across on this subject. Basically Wonderful. I'm also a specialist in this topic so I can understand your effort.

https://www.electricpercolatorcoffeepot.com/10-top-coffee-bloggers/


Kent Upadhyaya   January 11th, 2021 10:41 pm ET

Hello! I just now would choose to supply a enormous thumbs up with the great information you could have here within this post. I will be coming back to your blog site for additional soon.

http://yourmatrixcashmachine.com


Ilda Schak   January 20th, 2021 11:41 pm ET

I am continually invstigating online for posts that can benefit me. Thank you!

https://www.electricpercolatorcoffeepot.com/10-top-coffee-bloggers/


DioneLAnnand   January 28th, 2021 7:27 pm ET

Hmm it seems much like your blog ate my
first comment (it was extremely long) therefore i
guess I'll just sum it the things i submitted and say, I'm thoroughly enjoying your
site. I too am an aspiring blog blogger but I'm
still new to the whole thing. Have you got any suggestions for newbie blog writers?
I'd really appreciate it.


Vincent Lehan   January 28th, 2021 9:56 pm ET

Excellent weblog right here! Additionally your web site so much up fast! What web host are you using? Can I get your associate hyperlink in your host? I wish my web site loaded up as fast as yours lol

https://www.electricpercolatorcoffeepot.com/10-top-coffee-bloggers/


Ezekiel Goodlet   January 28th, 2021 10:06 pm ET

Enjoyed looking at this, very good stuff, appreciate it. "Talk sense to a fool and he calls you foolish." by Euripides.

https://www.electricpercolatorcoffeepot.com/10-top-coffee-bloggers/


Traffic-Software Get-1-Million-Visitors   January 30th, 2021 3:34 am ET

Want to get the best traffic software and best SEO tools on the market, that turn your advertising campaigns on auto pilot and make you passive income? Take a look on the best products available on SEO Market. Click on profile link for more information.

https://bitly.com/2EgbfPr


Cherryl Pendelton   February 5th, 2021 5:17 am ET

Earn 500 a Day With Our Passive Income System Doing These 3 Steps: Step 1: Get our ready made niche websites, Step 2: Setup your Paypal account. Step 3: Run our Unlimited Traffic System from our Free 850 sources of traffic and start earning your income in same day.

https://warriorplus.com/o2/a/pdps2/0


Ji Schock   February 6th, 2021 10:08 am ET

Earn 1000 a Day With Our Passive Income System

http://makedollarstoday.landingbit.com/cbprofitsites


KermitCTraff   February 9th, 2021 2:08 pm ET

Thanks for ones marvelous posting! I quite enjoyed reading it, you might be
an incredible author. I am going to make sure you bookmark your site and definately will often come back from now
on. I would like to encourage you continue your great posts, possess a nice evening!


Evan Worthan   February 12th, 2021 9:02 pm ET

Get the best traffic softwares, best SEO tools, and marketing tools, that makes your advertising campaigns run on auto pilot. Best Traffic Software and Affiliate Marketing Pre-Made Websites. VISIT US: https://www.k3reviews.com/

https://www.k3reviews.com/


zipper wallet   February 15th, 2021 3:26 pm ET

Hello there, simply was mindful of your blog via Google, and located that it's really informative.

I am going to watch out for brussels. I will appreciate
for those who proceed this in the future. Numerous other people will likely be benefited out of your writing.
Cheers!


High-Do-Follow Forum-Backlinks   February 16th, 2021 5:55 am ET

Create a profitable digital marketing strategy and plan: https://www.seoclerk.com/Virtual-Assistant/840836/I-will-create-a-profitable-digital-marketing-strategy-and-plan

https://www.seoclerk.com/Link-Building/842132/500000-Scrapebox-Blast-Live-SEO-blog-Comment-Backlinks


zipper wallet insert   February 28th, 2021 9:22 am ET

Wonderful work! This really is the sort of info that are supposed
to be shared throughout the net. Disgrace on Google for not positioning this publish higher!
Come on over and seek advice from my web site . Thanks =)


ClarkPring   March 1st, 2021 6:07 am ET

0bu3o zglkf qtrv


small notebook   March 4th, 2021 8:30 am ET

Ahaa, its pleasant conversation on the topic of this
post at the place around this website, We have read everything,
so now me also commenting here.


Ami Matern   March 4th, 2021 9:57 am ET

https://www.electricpercolatorcoffeepot.com/10-top-coffee-bloggers/


Darrin Prause   March 4th, 2021 10:58 am ET

https://www.electricpercolatorcoffeepot.com/10-top-coffee-bloggers/


Tifany Bimler   March 6th, 2021 1:51 pm ET

https://www.electricpercolatorcoffeepot.com/10-top-coffee-bloggers/


DaltonHBliek   March 16th, 2021 4:14 am ET

If some one desires to become updated with latest technologies then he must be visit see this site and stay updated constantly.


erotic massage london   March 22nd, 2021 5:55 am ET

Thank you ever so for you article. Really Great.

https://www.secrettantric.com/


sildenafil 20 mg sale   April 3rd, 2021 7:59 pm ET

sildenafil buy online canada https://eunicesildenafilcitrate.com/ sildenafil


tadalafil 40   April 6th, 2021 9:29 pm ET

generic tadalafil 40 mg https://elitadalafill.com/ buy tadalafil


injectable ed drugs   April 7th, 2021 2:28 am ET

alprostadil nasal spray https://alprostadildrugs.com/ what is alprostadil used for


generic levitra vardenafil   April 7th, 2021 4:24 am ET

vardenafil 20 mg tablets https://vegavardenafil.com/ vardenafil cvs


how much alprostadil vials   April 11th, 2021 5:07 pm ET

how do i use alprostadil urethral suppository https://alprostadildrugs.com/ caverject injections


40 mg tadalafil   April 13th, 2021 5:08 am ET

40 mg tadalafil https://elitadalafill.com/ tadalafil 40 mg from india


generic vardenafil 20mg   April 13th, 2021 6:17 am ET

vardenafil 10 mg https://vegavardenafil.com/ non-prescriptoin vardenafil


best viagra pills 25 mg canada pharmarcy   April 13th, 2021 11:32 am ET

is it legal to bring viagra back to canada from mexico https://canadaviagrastore.com/ generic viagra from canada


buy zithromax 500mg   April 13th, 2021 6:46 pm ET

azithromycin pfizer https://zithromaxes.com/ zpak for uti


organic viagra in canada   April 14th, 2021 7:03 am ET

organic viagra in canada https://canadaviagrastore.com/ viagra canada


cialis, sale, canadian pharm.   April 15th, 2021 5:59 am ET

cialis through canadian pharmacies https://canadacialisstore.com/ canadian pharmacy generic cialis


alprostadil pellet   April 15th, 2021 9:51 pm ET

alprostadil injection instructions https://alprostadildrugs.com/ how to adminiter transurethral alprostadil muse video


sildenafil 100mg online india   April 20th, 2021 9:44 am ET

sildenafil uk best price https://eunicesildenafilcitrate.com/ sildenafil buy usa


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