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Current issue

ELEKTRO 1/2019 was released on January 16th 2019. Its digital version will be available on February 12th 2019.

Topic: Electrotechnology; Materials for electrical engineering; Wiring material

Main Article
Electrically conductive adhesives for electrical engineering
Smart Cities (part 6)

SVĚTLO (Light) 6/2018 was released on December 3rd 2018. Its digital version will be available on January 4th 2019.

Luminaires and light apparatuses
Modular floodlights Siteco
Decorative luminaire PRESBETON H-E-X from the integral series town equipment
LED luminaires ESALITE – revolution in sphere of industrial lighting

Daylight
About median illumination by daylight
Professional colloquium Daylight in practice

Finding a new formula for concrete

27.05.2016 | MIT News | news.mit.edu

Researchers at MIT are seeking to redesign concrete — the most widely used human-made material in the world — by following nature’s blueprints. 

In a paper published online in the journal Construction and Building Materials, the team contrasts cement paste — concrete’s binding ingredient — with the structure and properties of natural materials such as bones, shells, and deep-sea sponges. As the researchers observed, these biological materials are exceptionally strong and durable, thanks in part to their precise assembly of structures at multiple length scales, from the molecular to the macro, or visible, level.

New way to engineer concrete

From their observations, the team, led by Oral Buyukozturk, a professor in MIT’s Department of Civil and Environmental Engineering (CEE), proposed a new bioinspired, “bottom-up” approach for designing cement paste.

They looked for connections between a material’s structure and its mechanical properties. For instance, the researchers found that a deep sea sponge’s onion-like structure of silica layers provides a mechanism for preventing cracks. Nacre has a “brick-and-mortar” arrangement of minerals that generates a strong bond between the mineral layers, making the material extremely tough.

Applying the information they learned from investigating biological materials, as well as knowledge they gathered on existing cement paste design tools, the team developed a general, bioinspired framework, or methodology, for engineers to design cement, “from the bottom up.”

Read more at MIT News

Image Credit: MIT

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