42.5 R/N Grey Ordinary Portland Cement

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Product Description:

Specification of Cement

No


Detail


result

I

Chemical test

1

Loss on Ignition

%

2.0 ÷ 4.0

2

Insoluble Residue

%

0.3 ÷ 2.5

3

SiO2

%

19.0 ÷ 22.0

4

Al2O3

%

4.0 ÷ 6.0

5

Fe2O3

%

2.5 ÷ 3.5

6

CaO

%

61.0 ÷ 67.0

7

MgO

%

1.0÷ 4.0

8

SO3

%

1.6÷ 2.2

9

Free lime

%

0.3 ÷ 1.5

10

Toltal alkali, (Max)

%

0.75

11

(C3S + C2S), (Min)

%

54.0

12

C3A, (Max)

%

2.5 ÷ 3.5

14

C4AF, (Max)

%

7 ÷ 11

15

False Set, (Min)

%

50

16

Chloride, (Min)

%

0.1

II

Physiscal test

9 ÷ 11

1

Fineness Blaine, ( Min)

cm2/g

3400

2

Soundness: Lecateller test, ( Max)

mm

5

3

Air content or mortar

%

5 ÷ 10

4

Autoclave Expansion

0.03 ¸ 0.20

5

Setting time, (Vicat test)

Initial,

Final,

min

110 ¸ 160

200 ÷ 300

6

Compressive Strength

3 days, (Min)

7 days, (Min)

28 days, (Min)

psi

2320

3480

5220



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Q:What are the ingredients of cement?
Do you mean concrete, that holds things together or for roads and bridges? It can be confusing because many call concrete cement. Concrete that is being mixed in the drum truck is made of cement (a dust), rock, sand, water, air. For some projects they will add flyash or other lighter weight additives and lower the actual amount of cement included.
Q:calculate quantity of cement needed?
You don't need cement at all. Ceramic tile is installed using thinset mortar. There are several types depending on the particular type of tile and the substrate you will cover. Additives are recommended for certain situations. The tile manufacturer should have a recommendation for mortar type and additives, if needed. Mortar coverage is given as a range, and each manufacturer will state that range on the bag. A typical sanded mortar will cover 0.3 to 0.4 square meters per kilogram. A 50 kg bag will cover 15-20 square meters, so only about half a bag would be required to do an 8 square meter area. Mortars are often packaged in multi-wall bags that include a plastic layer to reduce the infiltration of water vapor. Mortar, like any cement-based product, will absorb moisture from the air and degrade over time. Two layers of plastic bags tightly sealed with twist ties will keep leftover mortar fresh for future projects.
Q:Rubber cement on acrylic paint?
You will want to use an oil-based paint if it is going to be outside. If it will be inside, then you can use either latex or acrylic. Acrylic will last longer, though. So, I think you are on the right track.
Q:how do i tile over cement floor?
I would give a really good answer, but Jaz Iz Me already said it all!
Q:How can I clean a cement dog?
try vinegar.. when in doubt - this is my first choice.. mix it 1/4 vinegar to 3/4 water and go from there....
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 is cement made? and what is the chemical formula?
A cement is a binder, a substance that sets and hardens independently, and can bind other materials together. it was made from crushed rock with burnt lime as binder. Cement (as in Portland type cements) is made by heating limestone to 1450 degrees C, then grinding the result into fine powder and adding a small amount of clay. When mixed with sand, stones, or other aggregates, the result is concrete. Cement hardens by hydration, absorption of water, and not by drying. Chemical Formula for cement i think its 3CaO SiO2 Go to this link... this may help you to find you a better answer elearning.vtu.ac.in/Programme%2016/ENotes/ConcreteTechnology/Unit1-RVR/Unit1-L2-RVR.pdf
Q:what is the man made cement made from ?
Portland cement is made from a select variety of rock, heated to about 1500 degrees c = 2732 f, then ground to a very fine powder. Concrete is made from cement, silica sand and gravel, sometimes reinforced with steel wire or rebar. Neil
Q:How Can I Take Off Cement From A Cat?
You'd probably do best to get some help from a vet. She might have skin irritation she'll need treatment for and her little body is very fragile. If you found her, she needs a check anyway. There's no telling what's happened to her. It's just always a good idea to get a new kitten checked out - especially if she's covered in cement. Poor thing.
Q:Should hydraulic cement be applied inside or outside?
There is nothing magic about hydraulic cement in terms of trying to stop a leak. It is really used as a no shrink cement for anchoring posts, anchor bolts, etc into concrete. You need to determine exactly where the water is coming from and deal with it. You may have a severe ground water problem, poor drainage, or other causes.

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