Do you know the results of research, scientific articles or scientific theories on the adhesion of steel and synthetic fibers to the cement matrix?

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Can two types of cement be used simultaneously in one recipe for concrete composition?

Can two types of cement be used simultaneously in one recipe for concrete composition? (The first is cement as a binder and the second as sealing the graining structure).

20 September 2020 9,715 17 View

Does it make sense to add 12 mm long polymer fibers to a concrete mix with a maximum grain size of 8/16 mm?

Does it make sense to add 12 mm long polymer fibers to a concrete mix with a maximum grain size of 8/16 mm? (length of fiber anchorage in the concrete mix).

20 September 2020 5,173 2 View

Does the amount of shrinkage stress in concrete depend on the type of aggregate used? Is it only on the type of cement ?

19 August 2020 7,419 17 View

What happens if the amount of water used in the concrete mix is below the stoichiometric level ?

19 August 2020 9,334 3 View

What is the stoichiometric water level in a concrete mix?

19 August 2020 6,921 3 View

Does it make sense to design a concrete mix where the amount of water is equal to the amount of stoichiometric water ?

19 August 2020 2,871 3 View

Is it a good solution to use long steel fibers (50 and 60 mm) in self-compacting concrete mixtures?

Steel fibers can block the flow of concrete mix between the rebars. Is it a good solution to use long steel fibers (50 and 60 mm) in self-compacting concrete mixtures?

13 August 2020 596 9 View

Do you know of mineral or synthetic additives that influence the deaeration and form a tight structure of the concrete mix?

11 August 2020 4,970 3 View

Do you know the chemical admixtures that affect the deaeration and form a tight structure of the concrete mix?

11 August 2020 508 3 View

Do synthetic fibers reduce plastic shrinkage of concrete? Are there any scientific theories about this?

10 August 2020 7,915 3 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

12% ledeburitic cold work tool steel, etched for revealing retained austenite, any help for clarifying?

Hello everyone. Given microstructure image belongs to a 12% ledeburitic cold work tool steel (annealed and tempered). The sample was etched with picral (100 mL ethanol and 4 g picric acid). I...

02 March 2021 4,119 3 View

Why Austenite grains in steel show much more twinning than ferrite grains?

It is oftentimes said to be a distinctive metallographic trait that differentiates a fully austenitic and a fully felly ferritic steel without etching that might distinguish between two. Why...

02 March 2021 728 2 View

How Can I bring as much common elements in steel as possible to calculate stable phase(s) in OpenCalphad?

As I was tweaking step-by-step OpenCalphad6 Macros step1.ocm involving phase and thermal property calculation of a High-speed steel, I could not incorporate more than 6 elements in the steel...

01 March 2021 8,840 1 View

I need to accelerate corrosion in steel parts that are used in a salt-water environment. Is there a technique for doing so?

I have a structure that employs d-ring swiveling tie-downs that corrode during use and become "frozen". I have sample swivel assemblies that I wish to corrode to see if I can free them using one...

01 March 2021 3,739 3 View

Glass fiber content in a gypsum board ?

Any idea on how to get the volumic ratio of glass fiber in a gypsum board ? Thank you for your help !

01 March 2021 2,501 3 View

How to classify strictly upper triangular matrices by similarity?

Let F be a field. Consider U, the set of n times n strictly upper triangular matrices in F. For X, Y in U, we call them similar if there exists some S, which is non-degenerate and upper...

01 March 2021 2,957 8 View

Is CD44 degraded in lysosome together with hyaluronan after CD44 mediated endocytosis of hyaluronic acid?

Also when RHAMM binds hyaluronic acid, they get internalized, will RHAMM also be degraded? Or both CD44 and RHAMM will be transferred back to the cell membrane? Asking for breast cancer cell line...

01 March 2021 8,169 2 View

Why is the sum of the elements in a row in a Q matrix equal to zero?

When explaining substitution models, the substitutions are expressed as Q matrix. Why is the sum of the elements in a row zero?

28 February 2021 3,864 3 View

Distribution of particles in metal matrix?

How would define the "good" and "poor" distribution of particles within the matrix. Is there a quantitative solution to assess the distribution of the particles, which then having denotation of...

28 February 2021 7,397 8 View

Hossein Karimpour

May be this question would be answered by micro mechanics, as I know there are two kind of adhesion between fiber and matrix, the chemical bond and the frictional bond. thanks to micro mechanic you can find the pull out load in terms of frictional and chemical bond. it is worthy to be mentioned that finding specifications of fiber, matrix and fiber/matrix needs accurate experiments. in this regard you can see the articles of professor Victor Li . the main purpose of his researches is to reach strain hardening and multiple cracking instead of local cracking and softening response of the cement based composites.