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Old 11-17-2016, 11:01 PM   #1
Potemkin
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Default Spray on EMP resistantance for concrete

https://www.engadget.com/2016/11/16/...ti-emp-attacks

Spray-on conductive concrete will shield us from EMP attacks

While the threat of an EMP attack knocking out electronics and sending the world into an apocalyptic spiral seems far off, it's good to know that someone is working to protect us from it anyway. University of Nebraska engineers Christopher Tuan and Lim Nguyen have successfully created a cost-effective concrete mix that acts as a shield against "intense pulses of electromagnetic energy" and protects any electronic devices inside.

The EMP-proof concrete has actually been adapted from Tuan and Nguyen's previous -- and slightly more pedestrian -- breakthrough: self-warming concrete that can melt ice and snow with a safe, low-level electrical current. The pair was originally working on a way to build safer roads and bridges when they realized their new concrete could also block electromagnetic energy.

That microwave-blocking property comes from a key ingredient in the concrete mix called magnetite -- an iron ore with magnetic properties that allow it to soak up radiation. Tuan and Nguyen also added in more carbon and metal elements than traditional concrete in order to boost the absorption even further. Compared to building expensive metal enclosures or faraday cages, the University of Nebraska-Lincoln says the new conductive concrete is much cheaper and easier to deploy, and a prototype structure built with the material exceeded the military's own shielding requirements. As part of a licensing agreement with American Business Continuity Group, the University has even developed a commercially available, spray-on "shotcrete" version, so the material can easily be used to retrofit older buildings and potentially vulnerable infrastructure.
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Old 11-17-2016, 11:11 PM   #2
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http://news.unl.edu/newsrooms/today/...om-emp-attack/

'Conductive concrete' shields electronics from EMP attack

An attack via a burst of electromagnetic energy could cripple vital electronic systems, threatening national security and critical infrastructure, such as power grids and data centers.

Nebraska engineers Christopher Tuan and Lim Nguyen have developed a cost-effective concrete that shields against intense pulses of electromagnetic energy, or EMP. Electronics inside structures built or coated with their shielding concrete are protected from EMP.

The technology is ready for commercialization, and the University of Nebraska-Lincoln has signed an agreement to license this shielding technology to American Business Continuity Group LLC, a developer of disaster-resistant structures.

Electromagnetic energy is everywhere. It travels in waves and spans a wide spectrum, from sunlight, radio waves and microwaves to X-rays and gamma rays. But a burst of electromagnetic waves caused by a high-altitude nuclear explosion or an EMP device could induce electric current and voltage surges that cause widespread electronic failures.

"EMP is very lethal to electronic equipment,” said Tuan, professor of civil engineering. “We found a key ingredient that dissipates wave energy. This technology offers a lot of advantages so the construction industry is very interested.”

EMP-shielding concrete stemmed from Tuan and Nguyen’s partnership to study concrete that conducts electricity. They first developed their patented conductive concrete to melt snow and ice from surfaces, such as roadways and bridges. They also recognized and confirmed it has another important property – the ability to block electromagnetic energy.

Their technology works by both absorbing and reflecting electromagnetic waves. The team replaced some standard concrete aggregates with their key ingredient – magnetite, a mineral with magnetic properties that absorbs microwaves like a sponge. Their patented recipe includes carbon and metal components for better absorption as well as reflection. This ability to both absorb and reflect electromagnetic waves makes their concrete more effective than existing shielding technologies.

It's also more cost-effective and flexible than current shielding methods, Tuan said. Today’s shielding technologies employ metal enclosures that require expensive metal panel or screen construction, limiting their feasibility in large structures.

Through a research agreement with ABC Group, the Nebraska team modified its shielding concrete to work with the company's shotcrete construction method. The resulting patent-pending product protects building interiors from electromagnetic interference, such as radio waves and microwaves, as well as electronic eavesdropping. The material could protect military, financial or other structures that store critical electronics, such as data servers or aircraft.

Shotcrete, a spray-on method of applying concrete, can be used to cost-effectively retrofit existing buildings, a significant benefit to protect existing critical infrastructure and military installations, Tuan said.

To demonstrate its effectiveness, ABC Group recently built a prototype structure at its disaster recovery complex in Lakeland, Florida. The structure exceeds military shielding requirements.

“The concrete has the ability to provide what we call a multi-threat structure," said Nguyen, professor of electrical and computer engineering, who traveled to Florida to evaluate the prototype building. "The structure has to be able to withstand an attack either by an explosive or an electromagnetic attack or other scheme."

Under the licensing agreement, ABC Group has exclusive rights to market the shielding shotcrete product, and its EMSS-Electromagnetic Shielding Shotcrete is now commercially available, said Mauricio Suarez, director of licensing at NUtech Ventures, the university's non-profit technology commercialization affiliate.

“Our proprietary construction methods, which incorporate the Nebraska-developed technology, enable us to construct high-strength, blast-resistant structures that exceed military electromagnetic shielding requirements,” said Peter Fedele, ABC Group’s CEO. “Our prototype building has been well received as a new shielding construction material by leading experts in the EMP community.”

Tuan and Nguyen continue to investigate additional uses for conductive concrete, including improving de-icing and radiant heating and anti-static flooring applications. As new formulations expand the available applications, NUtech Ventures is helping the engineers apply for patents and navigate additional potential licensing agreements.
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Old 11-20-2016, 10:59 AM   #3
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As a general statement, in the field of electronics, a reinforced concrete slab is considered an excellent ground. This can be taken literally, in that a rebar reinforced slab can be considered one side of a Faraday cage. Further, a rebar reinforced concrete box resting on the Earth is considered a Faraday cage. Spray-on quick-concrete impregnated with a large amount of conductive metal will create a conductive coating - that when effectively grounded, creates a Faraday cage.
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Old 11-21-2016, 09:41 AM   #4
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Is this the same ABC Group?

http://www.bloomberg.com/research/st...vcapId=4217491
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Old 11-21-2016, 09:45 AM   #5
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What is the logic behind personal EMP protection ? In case of an EMP accident/attack, the whole grid goes down and you are left with your intact devices without power ?

The most important device we have are the mobiles, which might be outside home with you and will be gone.
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Old 11-21-2016, 10:10 AM   #6
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Quote:
protects building interiors from electromagnetic interference, such as radio waves and microwaves, as well as electronic eavesdropping.
I think that is part of the interest.

I suppose if your building ran on an internal generator at least, in the advent of disaster, everything inside would continue to work.

Does EMP pulse travel down electrical lines? Would it be able to affect a building through outside connections?

---------- Post added at 08:10 AM ---------- Previous post was at 08:06 AM ----------

This is interesting to speculate about:

https://en.wikipedia.org/wiki/Solar_storm_of_1859

Quote:
In June 2013, a joint venture from researchers at Lloyd's of London and Atmospheric and Environmental Research (AER) in the United States used data from the Carrington Event to estimate the current cost of a similar event to the U.S. alone at $0.6–2.6 trillion.[2]
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Old 11-21-2016, 10:24 AM   #7
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Quote:
Originally Posted by blue gecko View Post

Does EMP pulse travel down electrical lines? Would it be able to affect a building through outside connections?
Yes, absolutely. In the former USSR, they conducted an EMP test over Kazakhstan in the early 60s:

Quote:
The Soviet scientists instrumented a 570-kilometer (350 mi) section of telephone line in the area that they expected to be affected by the nuclear detonation in order to measure the electromagnetic pulse effects.[2] The electromagnetic pulse (EMP) fused all of the 570-kilometer monitored overhead telephone line with measured currents of 1500 to 3400 amperes during the 22 October 1962 test.[3] The monitored telephone line was divided into sub-lines of 40 to 80 kilometres (25 to 50 mi) in length, separated by repeaters. Each sub-line was protected by fuses and by gas-filled overvoltage protectors. The EMP from the 22 October (K-3) nuclear test caused all of the fuses to blow and all of the overvoltage protectors to fire in all of the sub-lines of the 570 km (350 mi) telephone line.[2] The EMP from the same test caused the destruction of the Karaganda power plant, and shut down 1,000 km (620 mi) of shallow-buried power cables between Astana (then called Aqmola) and Almaty.[3]
https://en.wikipedia.org/wiki/Soviet..._nuclear_tests
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