Navigation Links
Inexpensive new instruments test building sealants under real-world conditions
Date:4/5/2011

Washington, D.C. (April 5, 2011) -- Sealants, like weather stripping, are what separates the inside from the outside of a building, byproviding a barrier that prevents water from seeping in, for example, or heat from leaking out. The challenge, says research chemist Christopher White of the National Institute of Standards and Technology (NIST) in Gaithersburg, Maryland, is predicting when they will fail.

Current methods test sealants statically, by placing them outdoors for long periods of time, to measure their resistance to the elements. The problem, says White, is that under normal conditions, sealants are also affected by constant movement: the temperature-induced expansion and contraction of the different kinds ofmaterials they seal togethersuch as glass, in a window, and steel, in the window and building frame. "When you put sealant on a building, it is because the glass window and steel frame expand and contract at different rates with changes in temperature," he explains. "The sealant needs to be able to seal this gap, as it changes." This creates fatigue in the sealant, eventually causing it to crack and fail.

Using simple materials that can largely be purchased from a hardware storeincluding PVC pipe, wood, steel supporting frames, and toilet flangesWhite and his colleagues have developed the first instruments to test sealants under real-world conditions, while monitoring their displacement and load with sensors and tracking environmental conditions with a weather station. "This new devicewhich is very inexpensiveinduces movement that is very similar to what a sealant would see in the actual application, in a building," he says.

The designs of the two devicesone that puts sealants in tension and one that puts them in compression when coldhave been passed along to an industrial consortium of sealant manufacturers working with NIST. "Two companies have actually built and are using them for sealant testing," says White.


'/>"/>

Contact: Charles Blue
cblue@aip.org
301-209-3091
American Institute of Physics
Source:Eurekalert

Related biology news :

1. DEIMOS joins MARS and its satellite of instruments on seafloor
2. National Instruments and DENSO Robotics Collaborate to Address New Applications in Industrial Robotics
3. National Instruments and DENSO Robotics Collaborate to Address New Applications in Industrial Robotics
4. Quickly and easily integrate fingerprint biometric features into portable applications with Texas Instruments comprehensive, low cost fingerprint development kit
5. Building a better bee
6. Building the blood-brain barrier
7. Building better bones and tissue in the lab
8. Cell-building discovery could reduce need for some animal research
9. Building strong bones: Running may provide more benefits than resistance training, MU study finds
10. CSHL researchers pinpoint structure-building role for 2 non-coding RNAs
11. Brain building: Study shows brain growth tied to cell division in mouse embryos
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/2/2016)...   Parabon NanoLabs (Parabon) announced today ... Office and the Defense Forensics and Biometrics Agency ... company,s Snapshot Kinship Inference software for ... defense-related DNA forensics.  Although Snapshot is best known ... ancestry from DNA evidence), it also has the ...
(Date:1/28/2016)... 28, 2016 Synaptics (NASDAQ: SYNA ), a leading ... second quarter ended December 31, 2015. --> ... fiscal 2016 increased 2 percent compared to the comparable quarter last ... fiscal 2016 was $35.0 million, or $0.93 per diluted share. ... for the first quarter of fiscal 2016 grew 9 percent over ...
(Date:1/22/2016)... , Jan. 22, 2016 ... the addition of the "Global Biometrics ... to their offering. --> ... the "Global Biometrics Market in Retail ... --> Research and Markets ...
Breaking Biology News(10 mins):
(Date:2/9/2016)... ... February 08, 2016 , ... Net-Translators, an industry-leading ... launch of its revamped and improved website. In an on-going effort to further ... website will better communicate how the company designs and delivers thorough, high-quality results ...
(Date:2/9/2016)... , ... February 09, 2016 , ... ... Vice President for Public Policy for the National Organization for Rare Disorders (NORD). ... groups to ensure their voices are heard throughout the drug regulatory review process. ...
(Date:2/9/2016)... BERG, a biopharmaceutical company uncovering health ... announced the appointment of Jason Haddock ... Haddock brings to BERG over 20 years of ... senior financial functions at pharmaceutical companies, as well ... Niven R. Narain , BERG,s ...
(Date:2/8/2016)... 2016 --> ... innovation-driven oncology company developing next generation cancer therapeutics ... announced that chairman emeritus of Tata Sons Limited, ... company as part of the first close of ... Navam Capital and Aarin Capital. http://photos.prnewswire.com/prnh/20150923/766442 ...
Breaking Biology Technology: