Featured Research

from universities, journals, and other organizations

Cements that self-repair cracks and store latent heat energy?

Date:
March 2, 2011
Source:
Basque Research
Summary:
Cement (and derivatives thereof) is one of the materials most commonly used in construction, given its good performance at low cost. Over recent years, one part of scientific and technological research is aimed at incorporating additional functions into these materials. Researchers have studied the possibility of adding capacities to the cement such as the self-repair of cracks as well as the storing of latent heat energy.

Cement (and derivatives thereof) is one of the materials most commonly used in construction, given its good performance at low cost. Over recent years, one part of scientific and technological research is aimed at incorporating additional functions into these materials. Specifically, Doctor Idurre Kaltzakorta studied the possibility of adding capacities to the cement such as self-repair of cracks as well as storing latent heat energy.

Her PhD thesis, undertaken at Tecnalia's Construction Unit, was presented at the University of the Basque Country (UPV/EHU) and entitled: Synthesis of silica microcapsules encapsulating different organic compounds for addition in the cement paste.

As the title of her research suggests, Dr Kaltzakorta created silica (it is, for instance, the base of glass) microcapsules with organic material inside, the idea being to provide the cement with new functions. She opted for two types of organic materials, each corresponding to one of the two added features mentioned above. Thus, on the one hand, the microcapsules were filled with various epoxy resins (used in the manufacture of adhesives), to provide the cement with the capacity for the self-repair of cracks. On the other, phase change materials were encapsulated. These are materials which absorb or free a great quantity of heat on the phase of the material changing (from solid to liquid or liquid to gas and vice-versa), and enable the storage of latent heat energy in the cement material.

Sol-gel and emulsion

Ms Kaltzakorta studied the synthesis of the encapsulated material, opting for synthesising microcapsules by combining sol-gel chemistry with emulsion technology. This route enabled the encapsulation of organic material, difficult with other routes, under mild temperature and pressure conditions.

Once the microcapsules were obtained, the thesis analysed the effect of the addition of these to the cement matrix, to verify the viability of the technique. With this in mind, Ms Kaltzakorta used a number of techniques with which the features of the new cement material could be studied, techniques such as X-ray tomography, scanning electron microscopy, mechanical testing and differential scanning calorimetry.

In conclusion, the thesis shows the viability of the development of a new generation of cements capable of the self-repair of cracks as well as storing latent heat energy, based on the application of silica microcapsules with various organic materials. In fact, the research for developing the new cement with the capacity for self-sealing of cracks has given rise to a patent. Moreover, according to Ms Kaltzakorta, the proposal presented in this thesis is a commitment to sustainability. On the one hand, getting the cement material to self-repair increases the useful life of the structures. On the other, using a material capable of regulating the temperature within the buildings will enhance their energy efficiency.


Story Source:

The above story is based on materials provided by Basque Research. Note: Materials may be edited for content and length.


Cite This Page:

Basque Research. "Cements that self-repair cracks and store latent heat energy?." ScienceDaily. ScienceDaily, 2 March 2011. <www.sciencedaily.com/releases/2011/03/110302075957.htm>.
Basque Research. (2011, March 2). Cements that self-repair cracks and store latent heat energy?. ScienceDaily. Retrieved October 23, 2014 from www.sciencedaily.com/releases/2011/03/110302075957.htm
Basque Research. "Cements that self-repair cracks and store latent heat energy?." ScienceDaily. www.sciencedaily.com/releases/2011/03/110302075957.htm (accessed October 23, 2014).

Share This



More Matter & Energy News

Thursday, October 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

3D Printed Instruments Make Sweet Music in Sweden

3D Printed Instruments Make Sweet Music in Sweden

Reuters - Innovations Video Online (Oct. 23, 2014) Students from Lund University's Malmo Academy of Music are believed to be the world's first band to all use 3D printed instruments. The guitar, bass guitar, keyboard and drums were built by Olaf Diegel, professor of product development, who says 3D printing allows musicians to design an instrument to their exact specifications. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Chameleon Camouflage to Give Tanks Cloaking Capabilities

Chameleon Camouflage to Give Tanks Cloaking Capabilities

Reuters - Innovations Video Online (Oct. 22, 2014) Inspired by the way a chameleon changes its colour to disguise itself; scientists in Poland want to replace traditional camouflage paint with thousands of electrochromic plates that will continuously change colour to blend with its surroundings. The first PL-01 concept tank prototype will be tested within a few years, with scientists predicting that a similar technology could even be woven into the fabric of a soldiers' clothing making them virtually invisible to the naked eye. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Jet Sales Lift Boeing Profit 18 Pct.

Jet Sales Lift Boeing Profit 18 Pct.

Reuters - Business Video Online (Oct. 22, 2014) Strong jet demand has pushed Boeing to raise its profit forecast for the third time, but analysts were disappointed by its small cash flow. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
Internet of Things Aims to Smarten Your Life

Internet of Things Aims to Smarten Your Life

AP (Oct. 22, 2014) As more and more Bluetooth-enabled devices are reaching consumers, developers are busy connecting them together as part of the Internet of Things. (Oct. 22) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins