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:3/18/2016)... March 18, 2016 --> ... Biometrics, ICT, Manned & Unmanned Vehicles, Physical infrastructure and Perimeter ... companies in the border security market and the continuing migration ... Europe has led visiongain to publish ... success. --> defence & security companies in ...
(Date:3/14/2016)... 2016 http://www.apimages.com ) - ... - Renvoi : image disponible via AP Images ... --> DERMALOG, le leader de ... lecteurs d,empreintes digitales pour l,enregistrement des réfugiés en ... pour produire des cartes d,identité aux réfugiés. DERMALOG ...
(Date:3/9/2016)... , March 9, 2016 This BCC Research ... states of the RNA Sequencing (RNA Seq) market for ... as instruments, tools and reagents, data analysis, and services. ... segments of the RNA-Sequencing market such as RNA-Sequencing tools ... the main factors affecting each segment and forecast their ...
Breaking Biology News(10 mins):
(Date:4/29/2016)... ... April 29, 2016 , ... ... fundamentals to transform technology into a viable company, CereScan’s CEO, John Kelley, joined ... Kelley, a recognized leader and mentor in the Denver area business community, shared ...
(Date:4/28/2016)... , April 28, 2016 ... Stirling, and Brayton Cryocoolers), Service (Technical Support, Product Repairs ... Geography - Global Forecast to 2022", published by MarketsandMarkets, ... 2.94 Billion by 2022, at a CAGR of 7.29% ... market data Tables and 94 Figures spread through 159 ...
(Date:4/28/2016)... New York, NY (PRWEB) , ... April 28, ... ... plan, QuickSTAT has made significant investments in recruiting top industry experts, and expanding ... IT Platform, which provides industry-leading tools for clients to manage their clinical trial ...
(Date:4/27/2016)... ... 2016 , ... The Pittcon Organizing Committee is pleased to announce that Charles ... member of Committee since 1987. Since then, he has served in a number of ... chairman for both the program and exposition committees. In his professional career, Dr. Gardner ...
Breaking Biology Technology: