Recipe for success: Recycled glass and cement

February 21, 2012, Michigan State University
MSU researchers have found that concrete is more durable when crushed glass is added to the cement used to make the concrete. The MSU campus has several test sites where the concrete-glass mix was tested. Credit: G.L. Kohuth

( -- Michigan State University researchers have found that by mixing ground waste glass into the cement that is used to make concrete, the concrete is stronger, more durable and more resistant to water.

In addition, the use of glass helps reduce the amount of glass that ends up in and helps to reduce which are common due to the needed to create .

The , in which about 20 percent of the cement that is used to produce the concrete is replaced by milled, or finely ground, glass, is being tested at a number of sites on the MSU campus. And, so far, the results have been pretty positive.

“Milled glass enters a beneficial reaction with cement hydrates, so basically the chemistry of the cement improves with the glass,” said Parviz Soroushian, a professor of civil and environmental engineering who has been studying the glass-concrete mix. “It makes it stronger and more durable and doesn’t absorb water as fast as regular cement.”

The test sites, which have been in existence for about three years, are located on sidewalks outside of the MSU Surplus Store and Recycling Center, south of the Breslin Student Events Center and near Fee and Hubbard halls on the east side of the campus.

“It’s satisfying to see research done in MSU laboratories have very beneficial applications right here on our campus,” said Lynda Boomer, energy and environmental engineer with the MSU Physical Plant.

The concrete doesn’t look too much different than standard concrete, Boomer said. “It’s a little lighter in color, but, for the most part, pretty indistinguishable.”

Soroushian and colleagues recently had two papers published on the durability of the mixture, including in the Journal of Solid Waste Technology and Management, and the Journal of Construction and Building Materials.

“Cement is processed at a very high temperature,” Soroushian said. “Using milled glass significantly reduces the amount of energy used, as well as CO2 emissions.”

“We anticipate that this novel practice of partially replacing cement in concrete with mixed-color waste , which is based on sound chemical principles and the pioneering laboratory work conducted at MSU, will yield significant environmental, energy and cost benefits,” said Roz Ud-Din Nassar, a doctoral student in civil and environmental engineering who also worked on the project.

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not rated yet Feb 21, 2012
combine that with replacing steel rebar with 89 percent lighter basalt rebar and you build lighter/larger structures with less concrete, wich at that would be glass composite concrete, make slabs of those in a prefab style and erect buildings in a month like Broad Group from china is doing.
1.8 / 5 (5) Feb 21, 2012
I'm pretty certain that cement and concrete are 2 different types of mixtures; cement is almost always much smoother consistency with very few large particles, if any, while concrete can have small pebbles and other grainier ingredients mixed into the concrete and is not generally smooth. The article mentions both glass-concrete and glass-cement as though they are interchangeable surfaces. The glass in either mixture would need to be very small and solid so that there won't be any breakage if the pieces were larger and had air spaces within the glass. Glass-Concrete or Glass-Cement blocks for building structures would probably have a good R-rating and would be less likely to fall over in high winds. I like the idea. I might be wrong, but rebars made of sturdy bamboo would also keep each section lightweight and not subject to rust. I would have to ask a professional builder about this
2 / 5 (8) Feb 21, 2012
I'm pretty certain that cement and concrete are 2 different types of mixtures; cement is almost always much smoother consistency with very few large particles... unbelievable poop
And I am pretty sure you are either too dumb to use google or too lazy or a concretion of both. Perhaps you are more schooled in using wax to cast 200 lb metal boomerangs?
but rebars made of sturdy bamboo would also keep each section lightweight and not subject to rust.
Ahaahaaaahahahaha!!! This is what you should expect to hear from a 'professional builder', whatever that is (ever hear of engineers??) if you ever ask. You COULD call NASA. You seem to enjoy doing that.
1.8 / 5 (6) Feb 21, 2012
Ahaahaaaahahahaha!!! The Ghost of Asshole rides again. He/she is still misquoting me, just like his boyfriend FrankHerbert about his favorite delusion, boomerangs and his earwax. Twice again or more, he has been bested in a discussion by his superiors in other threads; evidently he/she is suffering from past mortifications and has searched everywhere, high and low for someone to victimize. He/she (perhaps GhostofOtto is a hermaphrodite and needs to go phuck himself. Yes, that might help and maybe not. ROFLOL
1.7 / 5 (6) Feb 21, 2012
Engineers' advice are not required in the forming of cement or concrete blocks, dimwit
2.3 / 5 (6) Feb 21, 2012
To anyone who's interested, I had heard of bamboo rebar years ago and how sturdy and reliable it is as a building material. I did not need to google for information on the stuff, but here's a few websites anyway for those who would like to know. Incidentally, I make my own concrete blocks and have used metal rebar only because I have no source for bamboo rebar in my area. I will double my efforts to find a source after reading this article.


2.2 / 5 (9) Feb 22, 2012
LOL I see that theghostofotto1923 isn't interested in coming back to this thread to further argue the point about the use of bamboo rebar in glass-concrete blocks. This quote applies to Ghost:

"The Epitome of Ignorance is Condemnation without Research" - Albert Einstein
1.8 / 5 (5) Feb 22, 2012
RitchieGuy is correct about the use of bamboo rebar in concrete blocks. I use bamboo in my concrete blocks all the time, it's good stuff and it holds up very well under any conditions such as all kinds of weather, pressure, etc. He's also correct about theghostofotto1923 being an asshole. TheGhost probably can't help being an asshole and all we can do is to pity the idiot. The ability to spout science that he copied and pasted from google or yahoo search doesn't make TheGhost a genius OR a scientist. I have been following TheGhost's comments for a long time and I see him as he really is, and that's a big phony who is full of himself. Get over yourself, TheGhost. Everyone knows that you are a phony who relies heavily on search engines for information because you don't have the knowledge in your head already from studying the science. lol
1.8 / 5 (5) Feb 22, 2012
Hehee nice try paolo/richieguy/pirouette the triumverate imbecilium. Sockpuppets are so good for mutual uprating of insecure souls with low self-esteem arent they? They make everything better again.

You tried this before didnt you? Youre so dumb it makes my eyes water.

Bamboo rebar... well I stand corrected. Say did you find anything on concrete vs cement? How about lost wax molds and molten metal?
Engineers' advice are not required in the forming of cement or concrete blocks, dimwit
So you didnt actually read the info in your link? It was written by engineers.

Keep flooding and posting nonsense like you were chatting on your cellphone with your mom instead of posting in a public forum. You are a constant source of hearty amusement.
2.6 / 5 (7) Feb 22, 2012
Hehee nice try paolo/richieguy/pirouette the triumverate imbecilium.

Well at least he no longer accuses me of being one of your alter egos.

Oh and to contribute to this argument I cite this http://www.cement...faqs.asp

Cement = the sticky stuff in concrete
Concrete = the final product

Cool stuff. I would be interested to see how this stuff fares over time compared to typical concrete which takes years to completely settle (and start cracking).
1.8 / 5 (5) Feb 22, 2012
LOL I have no idea what theghost is talking about. She is obviously demented and needs her meds. Thanks RitchieGuy for cluing me into this idiot's mental problem. I just came in here to talk about the glass-concrete thing and I'm being accused of being some stranger who I defended. I have a lot of experience with bamboo rebar because it's plentiful here in Taiwan.
WTF oh I remember now. I voted him down in another thread. He or she is a lunatic atheist, pushing his atheist beliefs onto religion believers. roflol I'll have to rmember that name for future reference.
2.3 / 5 (6) Feb 22, 2012

Bamboo rebar... well I stand corrected. Say did you find anything on concrete vs cement? How about lost wax molds and molten metal?
Engineers' advice are not required in the forming of cement or concrete blocks, dimwit

lol RitchieGuy is right. Theghost IS an asshole
2 / 5 (4) Feb 22, 2012
uh oh. . LOL. . .I see that old Ghost is still pulling the same old $hit all over again. but with a new victim.
Sorry he's gone goony on you Paulo. . .Ghost is mentally disturbed and he can't help latching onto new people. I see you're new to Physorg. Some other member told me that you downvoted Ghost. That's good. You're starting to fit in. :)
1 / 5 (3) Feb 22, 2012
Xbw. . .thanks for the link. I have worked with plain old iron rebar and concrete. . .but the concrete was ready made from a truck and they poured it into a receptacle for me so that I could work it fast. I have about 20 forms that I would shovel the ready made concrete into and let it cure for a long time. I had to keep it wet and cover it with a tarp to prevent it from drying out too soon on top. I sold a lot of the concrete blocks and I gave a bunch to my wife's father for his patio.
not rated yet Feb 23, 2012
I signed up just to say this - Firstly: Can't we all get along? Secondly: @TheGhost - Dude, just don't reply. You know what they say about arguing over the internet? It involves a race and a mental disability.
Thirdly: Was I the only one hoping this would mean that concrete would now be multi-coloured? (FYI: Little knowledge of engineering or physics just in case anyone tries to bash my ignorance)
And, finally: Thank you Stumbleupon for showing me awesome stuff
4.7 / 5 (3) Feb 25, 2012
"I'm pretty certain that cement and concrete are 2 different types of mixtures"
Ritchie Guy - flour is to cake as cement is to concrete. Clear you never worked on a building site mate.
1 / 5 (1) Feb 26, 2012
brainy. . . .if you read my earlier post you might have noticed that I said that I ONLY work with ready made concrete which I pour into plastic forms from the delivery truck. I do not make my own concrete. I do not have the time nor the equipment to mix Portland cement, aggregate, et al all together right now. I am mainly interested in the article because of the glass incorporated into the concrete, as well as my knowledge of bamboo rebar added for strength. You are correct. .I have never worked on a building construction project nor do I intend to. It's much harder work than I am used to doing, but I have great respect for those who do. I appreciate your input anyway. :)
1 / 5 (1) Feb 26, 2012
@stoner. . .coloring concrete has absolutely nothing to do with engineering. Pigmentation, yes
You're not building a bridge with concrete footings, are you? There is a powder that comes in some colors that you mix in with the cement, from what I've read. Never done it myself. if you like, you can also embed different color glass into the concrete before it sets and dries if you want the colors to be seen on the surface. Round marbles might work but they could get chipped with hard use. Good luck.

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