Building materials

Brick (47)
Building block (67)
Building material (77)
Cement (48)
Ceramic (17)
Insulating material (32)
Lumber (28)
Plaster (8)
Reinforced concrete (3)

Synopsis: 8. materials: Building materials:


BBC 00215.txt

Simple cement structures, reinforced with steel, can displace massive amounts of water, and last for decades-or even centuries.


BBC 00369.txt

Fur loses its insulation and mammals can face hypothermia pretty quickly, so it's vital to get dry as quickly as possible.


BBC 00454.txt

Technical crafts made possible by new research in thermodynamics are now presenting remarkable new opportunities for architectural designers to work with air gas and fluids as building materials.

and work in could become practical building materials for tomorrow's architecture. Â Similarly, new clothing by Amsterdam couture designer Iris Van Herpen elevates beyond the surface of the body


BBC 00460.txt

and ceramics oe an innovation that profoundly affected trade across the globe oe could have been made possible by a vital ingredient in a recipe assembled by serendipity.


BBC 00486.txt

where bacteria are mixed into traditional cement and form solid plugs when activated by water that seeps in from fine cracks in the material.


BBC 00680.txt

In other words, natural images seem to have some special"building blocks  from which they are constituted. If that's so, Bialek and colleagues think the brain might exploit this fact to aid visual perception by filtering out"noise  that occurs naturally on the retina.


BBC 00923.txt

with insulation in the space between. Compressors, condensers and refrigerants are pumped through the system to rapidly chill the milk


BBC 01150.txt

 only stem cells found in embryos had the ability to transform into the building blocks of  any part of the body,


impactlab_2010 00084.txt

and then cement the skull shut. Weeks pass. The marmoset is strapped to an EEG machine to track brain activity,


impactlab_2010 00551.txt

But the same technologies of oedistance learning are now finding their way onto brick-and-mortar campuses,


impactlab_2010 01340.txt

cement works and other energy-intensive factories required to close by Sept. 30. Energy analysts described it as a significant step toward the countrys energy-efficiency goals

The ministry said in its statement that the factories to be closed would include 762 that make cement, 279 that produce paper, 175 that manufacture steel and 84 that process leather.


impactlab_2010 01741.txt

lurching down the Yellow Brick Road yelling oebrains! Like every patient, Mr. Aten is courted assiduously with freebies by dispensaries who covet his caregiver rights. oemy guy used to give me a free half-ounce every month,


impactlab_2010 01805.txt

Cemex, the worlds third-largest cement maker, markets its products as Victor, Dixie, Richmortar and other names depending on the U s. state. oemany people dont even realize (the companies) are Mexican,

gravel, blocks and other building materials. The company says it employs about 18,000 people in the USA.


impactlab_2010 01979.txt

and fill gaps between bricks, stone blocks and other construction materials remains the best available material for restoring ancient buildings.


impactlab_2010 02460.txt

Steve Mcintyre lives in a small brick house near downtown Toronto. It is a Sunday afternoon


impactlab_2010 02520.txt

Its also built from 100 percent sustainable wood (sourced from trees felled by Mother Nature, rather than cut for lumber),


impactlab_2010 02717.txt

but is also why Microsoft may be able to cement its lead. Google is clear about its aims:


impactlab_2010 02830.txt

say, or the price of lumber, and then automatically send out an order to withdraw funds

Wireless point-of-sale terminals allow people with no access to brick -and-mortar banks to make deposits, withdrawals, payments, etc.


impactlab_2010 03218.txt

and their associated pathways are the building blocks for soybean oil content and represent targets that can be modified to bolster output


impactlab_2010 03307.txt

Most construction companies banged together job-site shacks of unfinished framing lumber but Webb used portable offices identical in color, furniture and what went on inside.

Most construction companies banged together job-site shacks of unfinished framing lumber but Webb used portable offices identical in color, furniture and what went on inside.


impactlab_2011 00573.txt

The Digital Fabricator Next Generation Food Printers Food is a basic building block of life. We have a hard time going longer than a day without it.


impactlab_2011 00591.txt

The descendants of thrifty Scottish immigrants, the Irvings are in lumber for the long haul; they ll plant some 28 million seedlings in their forests this year.

Canadian lumber raftman who immigrated to Nevada to find gold but made his fortune in Washington timber.


impactlab_2011 00906.txt

and they use building materials that earth-based farms do not (Is the total material used more than traditional farms?


impactlab_2011 00969.txt

they are going to be highly valuable cornerstone companies in the global economy, eating markets far larger than the technology industry has historically been able to pursue.


impactlab_2011 01047.txt

or grinded down into sawdust for use as insulation. From the sacrifice of a single tree, they create tables, chairs, swings,


impactlab_2011 01616.txt

With a little training, would it be possible to teach the swallows to work with cement instead of mud,

and use cement to build foundations for buildings instead of their mud nests. Perhaps they could even be trained to build monuments or towers.


impactlab_2011 02556.txt

which create an extra layer of insulation. In response to fear or anger, raised hair would make an animal seem larger and more intimidating.


impactlab_2012 00278.txt

The oldest member of the 11th generation, 50-year-old Charles Hill Carter III, still makes his home on the main property in a brick house that was completed in 1738,


impactlab_2012 00300.txt

since 6000 BC, enacted by millstones and similar implements#and replicated pretty much the same way until the late 19th century brought the advent of the steam mill. 10.


impactlab_2013 00063.txt

After the Chaos by Bob Verschueren Spruce and ash trees Arte Sella, Malga Costa, Italy, 2010 Listen#by Olga Ziemska Plaster hand casts and locally reclaimed birch logs Oronsko


impactlab_2013 00412.txt

Google wants to make#oeavailable to the rest of the auto industry all of the building blocks that we ourselves use,


impactlab_2013 00526.txt

Besides coolant to maintain superconductivity of the yttrium barium copper oxide ceramics on board, life-support and sanity-preserving systems (such as big video screens to distract its passengers from the fact that they re hurtling through the choking darkness),


impactlab_2013 00654.txt

Imagine a block of 14,000 interlocked Lego bricks#ow imagine trying to pull one out from the middle.


impactlab_2013 00814.txt

gas and fluids as building materials. Yale mechanical engineer Michelle Addington has documented vividly control systems for dynamic plumes of heating and cooling air that enclose building surfaces,

and work in could become practical building materials for tomorrow s architecture. An outer wall is designed to keep out hot desert breezes,


impactlab_2014 00468.txt

Theyadopted it almost as gospel says Bill Bishop of the consultancy Brick Meets Click. But Webvan didn t prove that online grocery-shopping can t work.


Livescience_2013 00572.txt

It included a throne room with a glazed brick panel showing palmettes floral reliefs and lions.

and yellow bricks with alternating images of dragons and bulls carved in relief. Â A reconstruction of it that incorporates surviving materials is currently in the Staatliche Museen zu Berlin Vorderasiatisches Museum in Germany.

They said to each other oecome let s make bricks and bake them thoroughly. They used brick instead of stone

and tar for mortar. Then they said oecome let us build ourselves a city with a tower that reaches to the heavens

 It notes that he wrote his name on one of the bricks saying This was built by Saddam son of Nebuchadnezzar to glorify Iraq.


Livescience_2013 01648.txt

They are providing a lot of meat to their community they are truly a keystone species Elbroch said referring to a species that provides multiple irreplaceable services that keep an ecosystem productive.


Livescience_2013 01698.txt

Newfound Particle Is a Higgs Boson</a p><p></p><p>A medieval headstone and skeleton have been found underneath a parking lot in Scotland


Livescience_2013 02435.txt

Therefore it is an important element in some cements. Source: Los alamos National Laboratory a


Livescience_2013 02491.txt

#Facts About Potassium Word origin: The etymology of the word potassium can be traced from English Latin and Arabic.


Livescience_2013 02854.txt

flour paste insulation paper wall board wood stains soap shaving cream and skin lotion. He experimented with medicines made from peanuts which included antiseptics laxatives and a treatment for goiter.


Livescience_2013 03198.txt

The oelower bricks became soaked and failed to support those above them the wall began first to crack


Livescience_2013 03201.txt

and then immigrated to The americas Smith said White potatoes didn't become a keystone of the American diet until about 1872 Bertelsen said


Livescience_2013 03410.txt

Though some of it may have been in good enough condition to be repurposed into building materials much was shredded into mulch in an effort to expedite the cleanup process


Livescience_2013 03988.txt

and soy oils the building blocks of junk food according to an annual report published by CALPIRG Apples to Twinkies 2013:


Livescience_2013 04003.txt

#Keystone XL Pipeline Will Cause Damage Beyond Spills (Op-Ed) Danielle Droitsch is director of the Canada Project at the Natural resources Defense Council (NRDC.

The Keystone XL pipeline is regarded widely as essential to enabling the tar-sands industry to achieve that dramatic level of growthand

For example Goldman sachs recently acknowledged that without Keystone XL lower prices for tar sands and higher transport costs will result in the cancelation or deferment of tar-sands expansion projects.

or without Keystone XL are unfounded simply. We already know that the prospect of a Keystone XL spill could have massive impacts on water resources affecting people across America's heartland.

Moreover the benefits of Keystone XL are overstated vastly. Keystone XL is an export pipeline that will not benefit the United states'energy security

and will create far fewer jobs than claimed by the oil industry. Keystone XL will directly lead to a significant increase in greenhouse-gas emissions

and under President Barack Obama's climate test the pipeline should be rejected. Six years ago I was lucky to get a mention of our canoe expedition through the tar-sands region in the local Canadian papers.

I couldn't have imagined that six years later the U s. president would set a high-profile marker to review the proposed Keystone XL tar-sands pipeline based on its climate impacts.

This is the kind of bold leadership we need on this issue leadership that will force us to acknowledge the true damages taking place from industrial tar-sands operations in Canadian boreal forests.

We cannot allow the Keystone XL pipeline to facilitate the expansion of this highly destructive dirty oil operation.


Livescience_2013 04013.txt

Old tires junk piles building eaves cement blocks upturned flower pots and even empty soda cans have been occupied by the bees according to the U s. Department of agriculture.


Livescience_2013 04421.txt

and a series of zoomorphic (animal) figures painted onto plasters Nordby writes. The cliff settlements were not to last.


Livescience_2013 04648.txt

and perhaps even amino acids the building blocks of proteins Torres said. He plans to study this in the near future to find out what's going on.


Livescience_2013 05844.txt

Making mud bricks What you will need: 1. Allow your child to mix each dirt sample with water to make mud.

oewhat kind of mud made the best bricks? oewhat didn t work so well? oewhat do you think would happen

if you built a house out of mud bricks and it rained? oewhat do you think you could mix with the mud to make stronger bricks?

4. Help your child find pictures of homes built with adobe and other natural materials.


Livescience_2013 06068.txt

A board-foot is a measure of the volume of lumber referring to a board that is 1 foot in length and width and 1 inch thick.


Livescience_2013 06092.txt

and isolated a small peptide a molecular building block of cells from the deadly substance. They fed the peptide to termites


Livescience_2013 06188.txt

which are the initial building blocks for the proposed Global Snow leopard Protection Program. CMS is represented well in the region of the 12 snow leopard range states six are parties to CMS four more participate in regional CMS conservation instruments


Livescience_2013 06368.txt

Drilling into the first board the lower part of the tree damages potential lumber and diminishes the value of that tree.


Livescience_2013 06449.txt

of which were covered in colored plaster called fresco. Archaeologists are trying to figure out the purpose of the building


Livescience_2013 06671.txt

Line the numbers up like bricks in a wall put 1s down the outside of each row


Livescience_2013 07449.txt

For generations cultures in tropical regions have used it for food cosmetics or building materials. Today coconut oil is sold also as a nutritional supplement that has an impressive range of touted uses from getting rid of lice to treating diabetes.


Livescience_2013 08130.txt

This stunning vertical rock is the largest granite monolith in the world. It rises more than 3000 feet above the valley floor


Livescience_2014 00297.txt

Biomaterials company Ecovative Design figured out a way to create protective packaging insulation and ceiling tiles that are made without using petroleum

Bayer and Mcintyre soon co-founded Ecovative Design and focused on creating mycelium-based wall insulation


Livescience_2014 00531.txt

Every patch of flaking stucco every sagging gutter every DIY disaster all were exposed to the revealing sun. Suddenly my neighbors who generally don't live in the same bubble of conservation concern in which


Livescience_2014 00674.txt

The illegally-harvested wood is sold as building materials and souvenirs and goes for as much as $2 to $3 a pound a burl dealer recently told the Associated press. A finished dining room table made of redwood can go for as much as $1300 on ebay according to the Associated press. Follow Laura Poppick on Twitter.


Livescience_2014 01342.txt

The roots of these plants form tangles deep in the prairie sod enabling early settlers to cut bricks from the soil.


Livescience_2014 01831.txt

This material when grown as a single crystal is said intrinsically transparent Harry Tuller a professor of ceramics and electronic materials at the Massachusetts institute of technology (MIT.


Livescience_2014 02468.txt

Every piece of usable timber walnut red and white oak and pine had been removed from this land and sold to the lumber market.


Livescience_2014 02495.txt

and then scanned the resulting powder for any materials that the gotten unglazed ceramic might have absorbed.


Livescience_2014 02939.txt

After testing out 12 different banana skins under the force of a shoe sole moving across it in a forward motion the researchers found the slimy fruit skin reduced friction by one-fifth compared with a show sole by itself on a linoleum floor.


Livescience_2014 03143.txt

In fact laser technology and aerial photos (digitally enhanced) ensured an impressive recreation of the city of Pompeii from the lavish villas down to the paving stones.

When archaeologists excavated Pompeii they filled these casts with plaster to produce the famous molds of people frozen in their dying poses.

what the city may have looked like Yeomans told Live Science praising the attention to details such as the raised paving stones in the streets and the political graffiti on the buildings.


Livescience_2014 03336.txt

and lumber and is being investigated as a potential biofuel the scientists say. The loblolly pine joins other recently sequenced conifers including the Norway spruce (Picea abies)


Livescience_2014 03722.txt

The newly constructed bee hotel at the University of New hampshire's Woodman Farm isn't much to look at with its cinder block floors


Livescience_2014 03800.txt

The film can be placed on nearly any surface concrete bricks or even sand and works in greenhouse facilities so it can be used in nearly any climate.


Livescience_2014 03856.txt

Like all proteins whey protein is made of building blocks called amino acids. Protein in the body is used primarily for muscle growth


Livescience_2014 04890.txt

and cement production go from about two tons and one ton respectively in 1990 to almost eight tons and two tons respectively in 2012.


Livescience_2014 04964.txt

We are beginning to learn that the genetic diversity of keystone species such as common tree species is very important for the resistance of an ecosystem to disturbance as well as its ability to bounce back after disturbance.


Nature 00211.txt

and ceramic cooking vessels contained traces of horse milk. Researchers also found that the horses'leg bones resembled those of domestic rather than wild horses.


Nature 00552.txt

-and-trade to reduce emissions from private industries such as cement and paper, for example, but companies that curb pollution even further would also be able to access international funds.


Nature 00619.txt

Meteorites, thought to be the building blocks of our planet, also have missing carbon, whereas comets,


Nature 00734.txt

$286 million to Solyndra of Fremont (photovoltaics), $82. 5 million to Tesla Motors of San Carlos (electric vehicles) and $60 million to Serious Materials in Sunnyvale (energy-efficient building materials.


Nature 00819.txt

and better housing insulation could lead to health risks from factors such as more indoor air pollution.


Nature 01214.txt

Nature Newsscientists say they have caught the first pieces of interstellar dust the fundamental building blocks of the Sun, Earth and the rest of the Solar system.


Nature 01285.txt

Steel and cement industries have amassed the greatest surplus. Tighter permit caps are expected from 2013 in the scheme's next phase.


Nature 01323.txt

which range from construction lumber to toilet paper, and to actively endorse them. We strongly believe that every improvement in environmental quality can translate into market value for our products,


Nature 01792.txt

and is found in the soil used to make mud bricks. Each type of calcite has infrared a distinctive signature,


Nature 02082.txt

to house a collection of tools, ceramics and bones from the Inca site Machu Picchu.


Nature 02137.txt

(Rangifer tarandus caribou) without diminishing lumber and pulp production. The companies that hold the rights to log roughly one-quarter of Canada's boreal forest have agreed to discuss giving them up in some unspecified areas;


Nature 03498.txt

which has led to high demand for cement, processed metals, and other energy-intensive products. Small firms that lack any kind of bookkeeping experience


Nature 04055.txt

500 years oldtraces of dairy fat in ancient ceramic fragments suggest that people have been making cheese in Europe for up to 7, 500 years.


Nature 04610.txt

visitors will encounter a shiny expanse of recycled plastic jutting out to sea on a platform of steel-reinforced concrete."

since towards concrete and plastic building materials. Many municipalities and consumers are making a similar choice as they build


Nature 04619.txt

but says that jars found at Lattera had typically been coated with pitch to help seal the ceramic.


Nature 05220.txt

and his concept of a universal Turing machine, a programmable system that stores and processes information, is considered a cornerstone of computer science (see Nature 482,441;

regulate gene expression is the focus of a Keystone Symposium on Molecular and Cellular Biology in Taos, New mexico.


popsci_2013 00002.txt

and built a shelter (a little snow cave with some pine needles for insulation) within the hour.


popsci_2013 00052.txt

Hidden within its innocent-looking stucco walls are domed gigantic copper cylindrical vats called âÂ#Âoetunsã¢Â# inside


popsci_2013 00259.txt

Google wants to make available to the rest of the auto industry all of the building blocks that we ourselves use he said


popsci_2013 00587.txt

when pulled by a special ceramic that contracts when stimulated by electricity. This enables the robo-bees to flap 100 times a second--fast enough to float in the air as a regular bee would.


popsci_2013 01087.txt

They printed bone grafts from ceramic dental crowns from porcelain hearing aids from acrylic and prosthetic limbs from polymer.


popsci_2013 01484.txt

and neatly sidestepped the issue of the controversial Keystone XL pipeline. I do want to be clear:

Allowing the Keystone Pipeline to be built requires a finding that doing so will be in our nation's interest he said.


popsci_2013 01507.txt

You want to move the bricks quickly along the assembly line but moving too quickly can cause the tofu to break.

and placement of soft tofu bricks then carefully packages them at a rate of only 1200 to 1500 pieces per hour the manufacturers say.


popsci_2013 01676.txt

First it would produce a supply of lumber/wood-pulp rather than using up a scarce and slowly regenerating supply.

if we as a nation try to limit products produced from trees (including paper furniture building material etc) then we would effectively drive responsible tree-producing farmers out of business.


popsci_2013 01852.txt

He's the one who has been arrested several times protesting--twice at the White house over the Keystone pipeline


popsci_2013 01986.txt

We do this all the time in the US in lumber forest. What does Dubai Coastal Expansion


popsci_2013 02125.txt

With the added trees for the future the price of lumber will come down with that future building cost.


popsci_2013 02261.txt

The beatification of Darwin as a sort of minor god in science is more of a cornerstone for secular progressives-than a fact of science.


popsci_2013 02639.txt

Then they poured 2. 15 million cubic feet of reinforced concrete to create an 20-foot-thick foundation mat.


popsci_2013 02693.txt

and the study areas were bare cement floors and walls. If there had been a literal prison cell with a desk and a chair


popsci_2013 03115.txt

Even with 6 inch stucco walls 16 of insulation in the attic and a 12 SEER heat pump the 115-120 degrees we see in the summer with the thermostat set at 82 monthly power bills easily exceed $220. 12 SEER was the most energy efficient available

and yes it's extremely energy efficient with triple pane windows solar panels a tremendous amount of insulation ceiling fans and 4 zone HVAC.


Popsci_2014 00626.txt

We track one rivulet to a single-story home made of pink stucco. There s a date palm in the front yard


Popsci_2014 00665.txt

In the rule EPA identifies four building blocks for carbon-reduction strategies that are already being used by many states


Popsci_2014 01076.txt

This shifts our understanding of apex predators as keystone species whose presence makes or breaks a healthy ecosystem.


Popsci_2014 01175.txt

#The World's Most Advanced Building material Is...Woodon a cloudy day in early October the architect Andrew Waugh circles the base of a nondescript apartment tower in Shoreditch a neighborhood in East London.

and it s a carbon sink sequestering the carbon dioxide it absorbed during growth even after it s been turned into lumber.

Put differently the world s urban future may just lie in its oldest building material. When most people think of wood architecture they imagine a balloon r rather a balloon frame the lightweight

But over the last two decades architects and engineers have begun to rethink the possibilities of wood as a structural building material.

And because it relies on layers of smaller beams it can reduce waste by using odd-shaped knotty timber that lumber mills would otherwise reject.

The result is a set of building blocks that a small crew of workers can screw together in a matter of weeks.

According to Wood For good an organization that advocates for sustainable wood construction a ton of bricks requires four times the amount of energy to produce as a ton of sawn softwood;

or concrete beams. 4) Interior walls are fireproofed usually by applying a layer of gypsum paneling on top of the mass timber panels. 5) A two-inch layer of concrete typically covers two two-inch layers of insulation

Construction is as easy as screwing the panels together. 7) Elevators have double walls with insulation sandwiched between them for fire safety


ScienceDaily_2013 00329.txt

and the industry is still the cornerstone of the country's economy. To assess the social economic and environmental impacts


ScienceDaily_2013 00334.txt

Sugar beet will be an important cornerstone of future genomic studies involving plants due to its taxonomic position the authors claim.


ScienceDaily_2013 01364.txt

and firewood and the mining of limestone there--used for the production of cement fertilizer


ScienceDaily_2013 01883.txt

and a previously unknown early brick structure above it fragments of charcoal and grains of sand were tested using a combination of radiocarbon and optically stimulated luminescence techniques.


ScienceDaily_2013 03459.txt

#New recyclable building material, made partially from potatoes, could help solve waste problema new biodegradable and recyclable form of medium density fibreboard (MDF) has been created that could dramatically reduce the problem of future waste.


ScienceDaily_2013 03648.txt

These are what ecologists call keystone species: critters that control an ecosystem and have a disproportionate impact on other species. And in the forests of New england

what are the keystone species? Put earthworms on the list. Kudzu vines grow madly covering power lines.


ScienceDaily_2013 03691.txt

and he explained that by adding potassium chloride the clay becomes really tough like cement. He was using it to strengthen the mud wall.


ScienceDaily_2013 04051.txt

because it helps to cement group function and cooperation he said. The work on the within-colony veil of ignorance has additional implications for the practice of science said Strassmann.


ScienceDaily_2013 04278.txt

and other keystones of the area's biodiversity but it has had significant costs for people living in the area.

and building material and rely on local grasses to thatch roofs and feed their livestock. The policies governing the park are top-down with little input from residents Carter said.


ScienceDaily_2013 04342.txt

They traced the uptake of C-14-labeled acetate into fatty acids the building blocks of membrane lipids and oils.


ScienceDaily_2013 05475.txt

--and a refined experimental setup that Silberg initially drafted with his son's spare Lego bricks--to establish a situation where just one microbial conversation was taking place

Agar was added to fill all parts of the dish except for the areas blocked by the bricks.


ScienceDaily_2013 05781.txt

and humanity has dealt with that through embalming purchasing elaborate headstones and more recently embedding ashes in ocean reefs

Besides funeral home websites that allow virtual visitors to sign guest books online mourning has evolved to include Facebook's R i. P. permanent memorials as well as virtual tombstones

which allow people to use their smartphones to scan headstone codes and launch websites with an interactive life story for those who visit the grave in person or online.


ScienceDaily_2013 06117.txt

and collagen-like Yarger and his team had to examine the biopolymers tiny molecular structures that serve as the building blocks for the silk using the Biocars sector 14 at the Argonne National Laboratory-based APS.


ScienceDaily_2013 07934.txt

Lignin is a kind of cement that embeds the sugar molecules and thereby gives firmness to plants.

The lignin cement has to be removed via an energy-consuming and environmentally unfriendly process. Plants with a lower amount of lignin or with lignin that is easier to break down can be a real benefit for biofuel and bioplastics production.


ScienceDaily_2013 09434.txt

which is a fundamental building block of microelectronics. Our work provides a new path for the realization of polarization-sensitive photodetectors that could be enabled on flexible


ScienceDaily_2013 10011.txt

and basal metabolic rate short period of hypothermia and high thermal insulation) that lead to reduce the energy allocated to heat production and growth.


ScienceDaily_2013 10742.txt

Carbon the basic building block of all organic tissue moves through the food chain at varying speeds depending on


ScienceDaily_2013 11185.txt

The problem is that manufacturing Portland cement accounts for seven percent of the carbon dioxide that industry puts into the air.

Portland cement is the source of the glue that holds most modern concrete together. But making it releases carbon from burning fuel needed to heat a mix of limestone and clays to 1450 degrees Celsius (2642 degrees Fahrenheit)--and from the heated limestone (calcium carbonate) itself.

or lower requiring far less fuel than Portland cement. Cutting greenhouse gas emissions is one powerful incentive for finding a better way to provide the concrete the world needs;

--and reacted with the ash to cement the whole mixture together. Pozzuoli Bay defines the northwestern region of the Bay of Naples.

In concrete made with Portland cement this is a compound of calcium silicates and hydrates (C-S-H). Roman concrete produces a significantly different compound with added aluminum and less silicon.

In theory C-S-H in concrete made with Portland cement resembles a combination of naturally occurring layered minerals called tobermorite and jennite.

Lessons for the futureenvironmentally friendly modern concretes already include volcanic ash or fly ash from coal-burning power plants as partial substitutes for Portland cement with good results.

These blended cements also produce C-a-S-H but their long-term performance could not be determined until the Monteiro team analyzed Roman concrete.

or less the temperature required by Portland cement. Lime reacting with aluminum-rich pozzolan ash and seawater formed highly stable C# -S-H

It could replace 40 percent of the world's demand for Portland cement. And there are sources of pozzolan all over the world.


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