60000 psi Nanopowder Concrete / Regular Concrete was 5000 psi

I found an Iranian Engineer who was a hot topic at US Science Magazines.
His name is Ali Nazari , he developed an concrete mixture which withstands 60000 psi when normal concrete is 5000 and French Lafarge Ductal Concrete is
capaple of 20000 psi and very expensive and shipped from France.

Only you have to do is to add 20 grams of nanopowder per 1 kilogram of concrete and steel fibers and plastic fibers, 1 kilogram of nanopowder is 20 dollars at China.

I know 12 meters long boat requires 25mm or 1 inch thick concrete.

Can you tell me how much that concrete decrease the thickness ?

Thank you,

Mustafa Umut Sarac
Istanbul

 

Are the claims about compression, tension or shear?

 

Not very much. The steel armature needs a thickness covering it. And 25mm sounds thin for 12m boat, unless a canoe.

I dug up the report. You have added an extra zero. The stuff tests at about 50% stronger using limestone aggregates. The aggregate is often the limiting factor in concrete strength. They should have been using granitic or pounded marble ags. Cast stone is easily made up to 12,000 psi.

The compressive strength of marble is about 20 kpsi, so you aren't going to make a concrete that is stronger than that.

 

When building with any material, one property is not all that is taken into consideration.

Normally as you increase one property of a material it decreases other properties.

Any new product will require testing to determine its suitability for different applications.

Poida

 

As is common sense, it is necessary to study all these requests and also torsion. Everything where applicable.

Not necessarily

 

philsweet,

I dont know what are you talking about but that is 60000 psi , sixty thousand psi concrete.

That concrete been designed for bunker busters againts high power explosives. American Skycraper concrete is 10000 - ten thousand psi , ductal 20000 twenty thousand and nano powder concrete is 60000 psi. If you look at databases - ali nazari concrete- you end up with too many journal articles.

Umut

 

Ps. Wrong Paper Wrong Paper !!!!!!

 

Mustafa, see table 5 of the link you posted. This is for concretes with ground slag and a nano admix. The strongest mix at 90 days was 79MPa. That's 11,400 psi. Nothing new there. The emphasis in the report is in reducing the amount of portland cement (and its associated energy footprint) needed to produce high strength concrete. The slag, portland and nano mix together result in an energy savings vs an equivalent all-portland mix.

Where are you getting 60,000 psi from?

 

I am not expert but all the science news magazines talks about that invention. There are tens of scientific articles from that scientist and one of them might reveal the formula.

If I am not wrong that would be with the one , uses aluminum nanopowders.If you research as ali nazari concrete at google , you might reach the articles and news.

For me , now , its not important to find exact article but to know how much it decreases the thickness.

Later , I will find it.

 

It seems all mention of 60,000 psi concrete stems from this quote, which is a "A friend of a guy I know knows a guy..." type fact. Zero hits on American Concrete Institute site for that or 'super concrete'. It's a suspicious coincidence that most mentions of concrete re-inforcement, that is re-bar, specify 60,000 psi for re-bar.

http://www.freerepublic.com/focus/news/1816872/posts

 

http://www.wired.co.uk/news/archive/2012-03/05/iranian-concrete

 

Well, the ultra high performance concrete, uhpc, gets up to 29,000 psi, which is a big improvement over regular concrete. I guess you're still building a tiny boat. I don't know how using the uhpc would change regular ferrocementing, I imagine it would, I don't know if anyone's tried it.

I thought you might like this....

https://www.youtube.com/watch?v=36gOx3dguWs

Try googling this....

ultra high performance concrete recipe

Youtube will show you a lot of unique stuff.

 

The linked publication (pdf) shows in table 5 a compressive strenght of 79.3 MPa maximum (11,620 psi). That is within the range of a better conventional concrete.

 

Heimfried,

It was the only publication coming from Al Nazari , free online.
May be there are more but I know now I have to look for 400 MPa.
I will research more and will attach the paper or link here.

 

200 to 800 MPa Concrete Paper - Ultra Strong Concrete

Lu and Young [3] achieved 800 MPa strengths on
compressed samples, and Richard and Cheyrezy [4]
developed Reactive Power Concretes (RPCs) ranging from
200 to 800 MPa and fracture energies up to 40 kJ m....

Journal of American Science 2010;6(4), Nazari, et al, TiO2 nanoparticles in Concrete

Improvement the mechanical properties of the cementitious composite by
using TiO2 nanoparticles

Ali Nazari*, Shadi Riahi, Shirin Riahi, Seyedeh Fatemeh Shamekhi and A. Khademno

Department of Technical and Engineering Sciences, Islamic Azad University (Saveh Branch), Felestin Sq., Saveh, Islamic
Republic of Iran.

* Corresponding Author: Ali Nazari, Assistant professor, Tel: + 98 255 2241511, E-mail: alinazari84@aut.ac.ir

Abstract: In this Paper, the split tensile and flexural strength together with the setting time of concrete by partial replacement
of cement with nano-phase TiO2 particles has been studied. TiO2 nanoparticleswith the average diameter of 15 nm were used
with four different contents of 0.5%, 0.1%, 1.5% and 2.0% by weight. The results showed that the use of nano-TiO2 particles
up to maximum replacement level of 2.0% produces concrete with improved split tensile strength. However, the ultimate
strength of concrete was gained at 1.0% of cement replacement. The flexural strength of fresh concrete was increased by
increasing the content of TiO2 nanoparticles. The setting time of fresh concrete was decreased by increasing the content of
TiO2 nanoparticles. It is concluded that partial replacement of cement with nanophase TiO2 particles improves the split
tensile and flexural strength of concrete but decreases its setting time. [Journal of American Science 2010;6(4):98-101].
(ISSN: 1545-1003).​