Two researchers from Delft Technical University in Holland have developed a self-healing cement that can stop microcracks from forming in concrete. The material incorporates alkaphilic bacterial spores (which thrive in the alkaline environment of concrete) plus a feeder material. When water infiltrates concrete, the spores are activated and convert the feed into limestone, sealing the crack and preventing larger cracks from forming.
Microbiologist Henk Jonkers and concrete-development specialist Eric Schlangen have been working on the project since 2006. Basements, tunnels, and transportation infrastructure are among the proposed wet environments that could benefit from the innovation, which may be commercialized in four to five years. Scientists from the South Dakota School of Mines and Technology are now cooperating in the project.
(http://www.citg.tudelft.nl//index.php?id=17205)
Dutch microbiologist Henk Jonkers explains "bioconcrete" technology:
http://www.youtube.com/watch?feature=player_embedded&v=PyBR3PDPa-c
Related Stories
| Feb 22, 2011
New EcoSpec Tile company offers recycled tiles
EcoSpec Tile LLC, established February 1, 2011, is a new tile manufacturing company started by a group consisting of experienced/time-tested tile professionals who collectively feel a strong responsibility to their industry and to their planet. The initial product offering includes sustainable tile material composed of 50% pre-consumer waste, 20% post-consumer waste and 30% new material recycled contents.
| Jan 21, 2011
Sustainable history center exhibits Fort Ticonderoga’s storied past
Fort Ticonderoga, in Ticonderoga, N.Y., along Lake Champlain, dates to 1755 and was the site of battles in the French and Indian War and the American Revolution. The new $20.8 million, 15,000-sf Deborah Clarke Mars Education Center pays homage to the French magasin du Roi (the King’s warehouse) at the fort.
| Jan 21, 2011
Library planned for modern media enthusiasts
The England Run Library, a new 30,000-sf glass, brick, and stone building, will soon house more than 100,000 books and DVDs. The Lukmire Partnership, Arlington, Va., designed the Stafford County, Va., library, the firm’s fourth for the Central Rappahannock Library System, to combine modern library-browsing trends with traditional library services.
| Dec 17, 2010
Subway entrance designed to exude Hollywood charm
The Hollywood/Vine Metro portal and public plaza in Los Angeles provides an entrance to the Red Line subway and the W Hollywood Hotel. Local architect Rios Clementi Hale Studio designed the portal and plaza to flow with the landmark theaters and plazas that surround it.
| Dec 17, 2010
Cladding Do’s and Don’ts
A veteran structural engineer offers expert advice on how to avoid problems with stone cladding and glass/aluminum cladding systems.
| Oct 13, 2010
Hospital tower gets modern makeover
The Wellmont Holston Valley Medical Center in Kingsport, Tenn., expanded its D unit, a project that includes a 243,443-sf addition with a 12-room operating suite, a 36-bed intensive care unit, and an enlarged emergency department.
| Oct 12, 2010
Holton Career and Resource Center, Durham, N.C.
27th Annual Reconstruction Awards—Special Recognition. Early in the current decade, violence within the community of Northeast Central Durham, N.C., escalated to the point where school safety officers at Holton Junior High School feared for their own safety. The school eventually closed and the property sat vacant for five years.
| Oct 12, 2010
Richmond CenterStage, Richmond, Va.
27th Annual Reconstruction Awards—Bronze Award. The Richmond CenterStage opened in 1928 in the Virginia capital as a grand movie palace named Loew’s Theatre. It was reinvented in 1983 as a performing arts center known as Carpenter Theatre and hobbled along until 2004, when the crumbling venue was mercifully shuttered.
| Oct 12, 2010
The Watch Factory, Waltham, Mass.
27th Annual Reconstruction Awards — Gold Award. When the Boston Watch Company opened its factory in 1854 on the banks of the Charles River in Waltham, Mass., the area was far enough away from the dust, dirt, and grime of Boston to safely assemble delicate watch parts.
| Oct 12, 2010
Cuyahoga County Soldiers’ and Sailors’ Monument, Cleveland, Ohio
27th Annual Reconstruction Awards—Gold Award. The Cuyahoga County Soldiers’ and Sailors’ Monument was dedicated on the Fourth of July, 1894, to honor the memory of the more than 9,000 Cuyahoga County veterans of the Civil War.
