HOME >> BIOLOGY >> NEWS
Bacteria could steady buildings against earthquakes

Soil bacteria could be used to help steady buildings against earthquakes, according to researchers at UC Davis. The microbes can literally convert loose, sandy soil into rock.

When a major earthquake strikes, deep, sandy soils can turn to liquid, with disastrous consequences for buildings sitting on them. Currently, civil engineers can inject chemicals into the soil to bind loose grains together. But these epoxy chemicals may have toxic effects on soil and water, said Jason DeJong, an assistant professor of civil and environmental engineering at UC Davis.

The new process, so far tested only at a laboratory scale, takes advantage of a natural soil bacterium, Bacillus pasteurii. The microbe causes calcite (calcium carbonate) to be deposited around sand grains, cementing them together. By injecting bacterial cultures, additional nutrients and oxygen, DeJong and his colleagues found that they could turn loose, liquefiable sand into a solid cylinder.

"Starting from a sand pile, you turn it back into sandstone," DeJong said. Similar techniques have been used on a smaller scale, for example, to repair cracks in statues, but not to reinforce soil.

The new method has several advantages, DeJong said. There are no toxicity problems, compared with chemical methods. The treatment could be done after construction or on an existing building, and the structure of the soil is not changed -- some of the void spaces between grains are just filled in.

DeJong and his collaborators are working on scaling the method up to a practical size, and applying for funds to test the method in the earthquake-simulating centrifuge at UC Davis' Center for Geotechnical Modeling. The centrifuge is part of the national Network for Earthquake Engineering Simulation, funded by the National Science Foundation.


'"/>

Contact: Andy Fell
ahfell@ucdavis.edu
530-752-4533
University of California - Davis
21-Feb-2007


Page: 1

Related biology news :

1. Bacteria may not hasten death
2. A friendly foe -- Bacteria residing in the gut boost immune response to tumors
3. Bacteria ferry nanoparticles into cells for early diagnosis, treatment
4. Bacteria show promise in fending off global amphibian killer
5. Bacteria control how infectious they become, study finds
6. Better together: Bacterial endosymbionts are essential for the reproduction of a fungus
7. Bacterial response to oxidation studied as toxin barometer
8. Bacteria from patients dental plaque causes ventilator-associated pneumonia
9. Bacterial walls come tumbling down
10. Bacteria research offers hope for new vaccine against meningococci
11. Bacteria in small sea life yield new way to make potential cancer drugs

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/4/2020)... ... March 04, 2020 , ... The Massachusetts Medical Device Industry ... IGNITE program’s 2020 IGNITE Cohort. The MedTech IGNITE Program is a virtual accelerator ... next generation of medtech founders and entrepreneurs. IGNITE Cohort members get access to ...
(Date:3/3/2020)... ... March 03, 2020 , ... Board-certified oral and maxillofacial surgeon, ... over 16 years of training and experience, Dr. Noffze can successfully extract problem and ... as soon as possible is beneficial to the oral and overall health of most ...
(Date:3/2/2020)... ... 02, 2020 , ... Rigaku Corporation is pleased ... and Applied Spectroscopy ( Pittcon 2020 ), being held March 1 - 5, ... and exposition on laboratory science, attracting attendees from industry, academia and government from ...
Breaking Biology News(10 mins):
(Date:3/12/2020)... ... March 12, 2020 , ... With the beginning ... increases the business investment in Europe by inaugurating a new scientific facility for ... of the new Nanoscience Center Europe took place Tuesday, February 18, 2020, gathering ...
(Date:3/4/2020)... ... March 04, 2020 , ... This month, Cognosante will ... FL. The company will showcase both expanded and emerging offerings that align with the ... is designed to be comprehensive, timely, and engaging. From Interoperability and ...
(Date:2/26/2020)... ... February 25, 2020 , ... Continuing its ... published the results of its safety assessment on the biotechnologically produced 3-Fucolsyllactose (3-FL) ... human milk. These complex carbohydrates are indigestible and therefore function as a prebiotic ...
(Date:2/21/2020)... ... February 21, 2020 , ... Pharmaceutical manufacturers are ... order to adapt to new approaches like ‘Industry 4.0’ and continuous manufacturing, combat ... personalized medicine and therapies. But with an industry with the world’s tightest regulations ...
Breaking Biology Technology:
Cached News: