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Architecture

New LEED Certification Will Require Energy Reporting

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Green architecture and bestellen levitra online design is link for you cheap discount viagra so important in the world's quest for greater energy efficiency, but a green design is only as good as the person using it.  A low-flow shower head is a great tool for cutting back on womens viagra cheap no prescription water use, but if the cheapest propecia us owner takes 45-minute showers, the shower head becomes negligible.  Luckily, the U.S. Green Building Council wants to make sure its LEED program stands for more than just Leadership in Energy and Environmental Design, but also leadership in energy and environmental performance.

The USGBC announced last week that all projects seeking LEED certification will be required to report their energy and water use as a condition of certification.  This new requirement will allow the USGBC to collect information for future versions of LEED and to ensure that the get levitra fast certification doesn't just mean a building has green features, but is also operating in the most efficient way possible.

The USGBC hopes that energy reporting will highlight any gaps between design and performance that can lead to cheapest cialis both better design and better behavior on the part of building occupants.  Any projects applying for certification will have three options for fulfilling this requirement.  They can report energy and water usage on a yearly basis, apply for recertification every two years under LEED for Existing Buildings or they can sign a release authorizing the USGBC to access their energy and water usage directly from their utility.

The council is working to eventually have all LEED buildings metered in some way so that this information is collected automatically.

via USGBC

 

 

Bendable, Self-Healing Concrete is Hundreds of Times Stronger

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Any engineer would look at this image and say, "That can't be concrete!" But it is; and it could represent a way to make bridges and other structures safer and longer lasting.

There is a lot of work being done to improve concrete, right now. And while it is generic viagra pills from india not the most beloved green building material, it has properties that make it eminently useful for engineers and good choice viagra on line architects for a number of purposes. Given that there is not going to be a sudden moratorium on using the stuff, it's better to have improvements that can keep from having it go from useful building material to landfill.

Professor Victor Li at the University of discount drug levitra Michigan has developed a self-healing concrete that can help alleviate the need for demolition and replacement of concrete after it has been subjected to www.pneumapaniagua.es heavy stress. By devising a concrete that controls the way it cracks under stress, the concrete can withstand tensile strain hundreds of times more than ordinary concrete. Beyond its remarkable flexibility, this concrete can then heal itself, as well.

"In Li's lab, self-healed specimens recovered most if not all of their original strength after researchers subjected them to a 3 percent tensile strain. That means they stretched the specimens to 3 percent beyond their initial size. It's the equivalent of stretching a 100-foot piece an extra three feet—enough strain to severely deform metal or catastrophically fracture traditional concrete."
The new concrete needs only exposure to moisture and carbon dioxide in order to heal the microscopic cracks that are formed after the concrete has been stressed. The cracks expose dry cement in the structure, and this reacts with CO2 and moisture to form calcium carbonate 'scars' which quickly heal the concrete.

"The professor says this new substance could make infrastructure safer and more durable. By reversing the typical deterioration process, the concrete could reduce the cheap viagra from uk cost and environmental impacts of making new structures. And repairs would last longer."

Link: Michigan Today (thanks KGS!)

 

Concrete Structures Could Last 16,000 Years

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Concrete has become a major focus of green building initiatives and research.  The manufacture of cheapest cialis the material is one of the worst CO2 generating processes in the world, with five to where to buy cialis eight percent of manmade CO2 coming from concrete production.  MIT researchers have come up with a way to cut those numbers dramatically by making concrete structures last as long as 16,000 years, requiring less of it to be made in the first place.

The discovery centers around creep -  the breaking down of concrete, which they've realized is caused by the rearrangement of nano-scale calcium-silicate hydrate (CSH) particles.  CSH particles go through two density phases when mixed with water, at first a density of 64 percent and secondly a density of 74 percent.  That upward shift in density causes creep.

The researchers have found a way to stop creep by adding silica fumes - a by-product of how do i get cialis producing aluminum - to the concrete.  This addition accelerates the density phases all the way to 87 percent and could ideally lead to longer lasting and lighter concrete structures.

The MIT team calculates that structures that were built to last 100 years could last 16,000 years with this new process and i use it viagra free pills the 20 billion tons of concrete produced annually could become a dramatically lower number.

via Greentech Media

 

A House You Can Heat with a Hair Dryer


Leave it to Germany to create Passivhaus, an extremely rigorous standard for home energy efficiency that makes houses so efficient that they can take on a German winter with nothing more than the sample viagra heat from a hair dryer.

The Passivhaus system uses technologies that are available today, and there are over 20,000 Passivhaus homes in the world (though, only about 7 in the U.S.) The standards require a good mix of high-tech (heat-exchange ventilators and fancy triple-pained windows) and low-tech (big thick, well-insulated walls.)

Of course, all of this makes the homes difficult (and expensive) to build. The hardest part is making the homes nearly airtight. The foundation walls and ceiling all have to seal together perfectly. In effect, a Passivhaus home could almost exist on the surface of Mars. Making them air-tight also means they need special ventilators that pump in fresh air without pumping out the home's heat. These heat-exchange ventilators are becoming fairly common, I've even got one in my house, though it's not nearly as air-tight as a Passivhaus home.

All of this adds up to a home that can be as much as double the cost per square foot of your average American home. Of course, we're talking about current average American homes, which, we all must admit, haven't been the most well-built buildings in the world.

In the end, Passivhaus blows even LEED Platinum out of the water, requiring 70% less energy for heating than a LEED certified home. Most days of levitra rx the year, you can literally heat your home with body heat...if you play enough DDR.

 

Are Environmentally-Friendly Suburban Homes Really Green?

The Wall Street Journal offered an intriguing challenge to four top architectural firms -- Mouzon Design House, Rios Clementi Hale Studios, Cook + Fox, and William McDonough + Parnters -- design the green house of the future. The teams cooked up some intriguing designs full of eye-catching concept art and all the right hot topics -- solar power, heat pumps, carbon nanotubes and more.

So why are some environmentalists complaining about the www.peseta.org competition and the concept of a "green suburbia"?

Roger Lewis of the Washington Post offers an intelligent and considered rebuttal to the WSJ piece, writing, "Focusing on hypothetical designs of free-standing houses can even be a distraction. It can mask a more serious aspect of the challenge: the diminished sustainability of tramadol 50mg 180 low-density, residential subdivisions in suburbia where most free-standing houses of the future are likely to be situated."

He states, "No matter how green individual homes are, suburban sprawl is intrinsically anti-green. It generates infrastructure inefficiency; car dependency and buy softtabs viagra rising fossil fuel demand; carbon-emitting, time-wasting road congestion; and, despite availability of inexpensive land at ever-greater distances from jobs, escalating development, construction and public service costs."



The article provides an intriguing reminder that green architecture isn't always as green as it seems. And cities, often associated with pollution, are potentially the greenest societal direction of them all.

Here at Ecogeek we often cover green architecture and building technology, both in the city setting and in suburbia. As there will always be some people who yearn for suburban or rural settings, both design approaches have merit. However, when it comes to the greater good, or greater green perhaps, cities arguably present the most environmentally friendly, lowest impact, living opportunity.

From electric vehicles to urban agriculture, the city has arguably the greater potential for green communities, with minimum land use, greatest energy efficiency, and lowest environmental impact. And with the U.S. population's exodus from cities to surburbia reversing for the first time in five decades, the timing is ideal for green city architecture. So let's move the focus onto greening cities, but let's not blindly throw out suburban efforts wholesale, either.

 
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