Chinese Portland Cement

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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:Cement Needed for Porcelain Tile?
sounds fishy to me...portland cement is only 10.00 a bag...
Q:why cement board over hardie backer board when laying down a counter top for kitchen sink?
Wood tick is right, cement board over a minimum 3/4 plywood on counters. If you mean choosing cement board over hardy backer board, I choose cement board any day. Durock in particular. I ve used it and never had problems in 20+ years that I ve been setting tile. Any questions you can e mail me through my avatar and check my qualifications there. GL
Q:How does cement set? Don't say Just add water!?
Chemical changes occur and this causes the setting.
Q:Can someone tell me where to buy White Portland Cement?
It is incorrect to say that there is not actually White Cement and that it is an additive like in colored concrete. White Cement is just hard to find because it is uncommon. The chances that your local ready mix producer would have it in his silo is almost none. When they have to use it they have to get in in bags but since they are typically running at least 470 lbs a yard they buy it by the pallet. You might ask them who they get it from and then see if they would give you a number since you will only need a few bags. They might be happy to so they don't have to deal with it and then you can contact the cement producer or broker.
Q:What are the ingredients in Rubber cement?
Rubber Cement Ingredients
Q:How can I mount my tv onto a cement wall?
You would use Tapcons, or metal expansion sleeves, to attach the mount to the wall..
Q:about cement?
What do you want to know?? Here is some info... In the most general sense of the word, cement is a binder, a substance which sets and hardens independently, and can bind other materials together. The name cement goes back to the Romans who used the term opus caementitium to describe masonry which resembled concrete and was made from crushed rock with burnt lime as binder. The volcanic ash and pulverized brick additives which were added to the burnt lime to obtain a hydraulic binder were later referred to as cementum, cimentum, cäment and cement. Cements used in construction are characterized as hydraulic or non-hydraulic. The most important use of cement is the production of mortar and concrete - the bonding of natural or artificial aggregates to form a strong building material which is durable in the face of normal environmental effects.
Q:Does a permament retainer's cement that holds it in, what things can break that down?
I had a permanent retainer for almost ten years. The retainer itself had come out and all that I had left was the cement. I went to my dentist and within five minutes it was gone. Very simple. But nothing else works. Sorry, but go see your dentist.
Q:Does the cement/glue for your braces come off o.o?
The orthodontist has special tools that get the glue off.
Q:What cement stick to tile glue?
I can't understand hy you are putting more cement on a concrete floor. But if you need to repair holes or cracks and the VCT glue has been removed, I would use a 'self leveling grout' (Stronger than cement) The only way that thin of a coat would stick is to prepare the floor with a light acid wash and then apply a 'bonding agent' and then pour the self leveling grout. It should be soupy and you should have enough on hand to finish before you start. Good luck.

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