Grey Ordinary Portland Cement in bag

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I. CEMENT STANDARD

1.Vietnam standard (TCVN)

- Quality of Cement as per TCVN 6260 - 2009

2.European standard (EN)

- Certificate I -EN 197-1.2000- CEM II 42,5 R

- Certificate II - En 197-1.2000 CEM II 42,5N

- Certificate III - EN 197-1.2000 CEM I 42,5R

3.American standard (ASTM)

- ASTM C150 TYPE-1

- ASTM C1157 TYPE- GU

- ASTM C1157 TYPE- HE


II. SPECIFICATIONS FOR ORIDINARY PORTLAND CEMENT AS PER EN 197-1:2000/CEM II 42.5

Items

Units

Specification

Test Results

Test Method

SiO2

%

≤ 26.00

23.41

EN 196-2

Al2O3

%

≤ 6.50

5.50

Fe2O3

%

≤ 4.50

3.60

CaO

%

≥ 54.00

57.00

MgO

%

≤ 5.00

2.75

SO3

%

≤ 3.5

2.56

Loss on Ignition, (LOI)

%

≤ 10.00

7.00

Insoluble Residue

%

≤ 12

6.00

Physical and Mechanical Properties

Finess test

EN 196-6

-          Blaine

cm2/g

≥  3200

3800

-          Retained content on sieve 75mm

%

< 15.0

0.10

Time of setting

-                      Initial set

-                      Final set

Minutes

            ≥  75                      

< 420

145

200

EN 196-3

Soundness (LeChatelier)

mm

< 10.0

1.0

EN 196-3

Compressive strength

MPa

EN 196-1

2 Days

≥ 20.0

23.0

3 Days

-

27.0

7 Days

-

37.0

28 Days

≥  42.5

50.0



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Q:Epoxy glue vs PVC cement?
Pvc Epoxy
Q:I just accidently put some treated pine posts in pure cement instead of concrete., what can I expect to happen
THE CEMENT WILL SET UP--BUT NOT BE AS STRONG AS CONCRETE-BECAUSE IT DOESNT HAVE SAND AND GRAVEL--IT WILL CRACK AND THE POST WILL BECOME LOOSE-- IF THERE IS NO WEIGHT PUSHING ON THE FENCE--IT WILL PROBABLY BE ALL RIGHT
Q:Is there a solvent for plumbers cement?
if the reason ur changing the valve is because it's not working, then don't change it, replace the stem only, behind handle loosen nut, turn stem counter clockwise till it comes out, do same w/new valve, put new stem in old valve, just make sure you remove any remains of old washer. I do this all the time, it's saves time and a lot of trouble and the outcome is the same. As far as cement goes, it maybe rectorseal #5 oilbase pipe thread compound since the valve you showed has compression connections on in and out sides.
Q:how to start new cement industry?
A new cement industry or a new cement company? Are you actually going to be dealing in cement or is it actually going to be some sort of concrete product manufacturing? It is common for people who are not familiar with concrete to call concrete cement which is only the binder for the final product.
Q:How much cement does it take to fill 401 cubic in?
I think there needs to be more data. For example, how much volume does one pound of cement fill....or something like that in order to complete the equation.
Q:How to start a cement factory?
Are you talking about a plant that supplies bags of cement mix like you'd buy at Home Depot, or a plant where you fill the cement mixer trucks and they go out and pour the stuff into whatever? Either way, the easiest way might be to find a defunct one and reopen it.
Q:blue cement on my molars? Braces?
Uuuggggghh the blue cement. I hated that stuff. The texture was so weird and... bleh. Anyway, it took me about a month, maybe 3 weeks, before chewing got to be more normal, once the cement started wearing down. Don't worry, eventually it does wear down and you'll be able to eat like normal. The orthodontist will take the cement off when your overbite is improved enough. For me, it took about... 10 months, I think. But it all depends on your individual case, and your orthodontist. I know one girl whose ortho never actually removed the cement. She doesn't care, because the blobs are so tiny by now, but it happens.
Q:Can a dental assistant cement in a permanent crown?
Your dentist should re-shape to your specifications - it is perfectly normal for you to feel a bit of roughness or ill fitting after the novacane wears off. My dentist was happy to accommodate, no charge. As for an assistant shaping...maybe it differs from state to state, but I have NEVER had an assistant shape a crown for me here in Georgia. Good luck.
Q:What is Rietveld method &its application in cement industry?
The Rietveld method uses a powder sample instead of a large single crystal to determine crystal structure by X-Ray Diffraction. This is important in the cement industry because cement is a powder and not crystals of any size. This is useful in determining the quality of the product and adjusting burning conditions in real time. Several different software packages have been developed for this technique.
Q:know the cement but I want to know the exact definition in engineering view.?
cement is a cementing material or binding material used in engineering construction. It is manufactured from calcareous substance and is many respects to the strongly limes but possessing far greater hydraulic properties. thanks.

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