P.O 42.5 R/N 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:lay bricks on concrete - use mortar or cement?
Mortar is a mixture of cement, sand, and lime, and it will work fine. Do yourself a favor and SEAL the pavers about 30 days after the installation. This will help keep water from penetrating, which can make the bricks release from the concrete, or crack from ice. Use the best sealer that a MASONRY SUPPLY place sells. It will hold up much better than anything you can get at Home Cheapo or Lowes.
Q:i think i have a allergy to the to the dentists cement?
Modern dentists usually use methal arcylate cement. Allergies to arcylates are extremely rare, but rare does not mean non-existent. So it is possible that you are indeed allergic to the cement. An allergist physician can probably test you to see if that is your problem. In the old days, before arcyclates, dentists sometimes used zinc phosphate as a cement. You might talk to your dentist to see if he can get that to use on you. (It might help if your dentist is older. I suspect many recent graduates have never even heard of alternatives to arcylate cement.) If that doesn't work, check in your area to see if there are any dentists who hold out as being natural, homeopathic, or similar terms. They may offer alternative treatments and alternative cementing compounds.
Q:Cement Overlay?
if you haven't done it before you would be better off putting real tiles down i saw a program about that it wasn't an amateurs job but if you still want a go you'll need cement colouring and a type of large pattern maker for the tile shape and a whole load of cement plus you need to make sure your floor is strong enough to take the weight of all that cement
Q:Does a mobile home need a cement pad to sit on?
Most mobile homes are supported on concrete blocks. Shims are then used to assure proper leveling so all the doors and windows open properly.
Q:How are the ashes from a volcano used to make cement?
Commercial cement is not made from volcanic ash. It is usuually made with limestone or marble (source of CaO) as the main ingredient. Other incredients include some clay and gypsum. After mixing the stuff is heated to form clinker then with some more mixing goes into bags, bins, or tanks for mixing with sand, gravel and water to make concrete. Volcanic ash will harden somewhat into a cement-like compound when it becomes wet. Many cars had their paint jobs ruined in 1980 by Mt. St. Helens ash mixed with a little precipitation.
Q:can you install cement backer board over old sheetrock?
You can but it will bump all the walls in by the depth of the cement board. Plus, if it is a bath or kitchen, then the cement board will encroach on the tub and/or sink, especially considering the extra depth the tile will add. I always remove the old sheetrock because mold can easily be growing in there if it is in a room prone to dampness like a bath or kitchen. Also, the cement board will be a much sturdier mount if it is directly on the studs.
Q:What is the density of cement?
I will answer your question directly, then answer the question I think you are asking. Cement is a gray powder that is mixed with water and aggregate to make concrete. Cement and concrete are 2 different things. Cement is to concrete as flour is to cake. With that said, cement (the powder) has a specific gravity of 3.15, which means it's density is 3.15 times that of water. Water has a density of 62.4 pounds per cubic foot, so cement has a density of 196.6 pounds per cubic foot. If you actually mean concrete, which is the hard grey stuff, then it has a density of about 150 pounds per cubic foot. Hope that's what you were referring to.
Q:running on cement?
Asphalt is much softer and better than concrete, so run on the road or on asphalt trails more than sidewalks if you can. Bike paths are another good option. The effects won't be too bad if your not overweight, but if you carry a few extra pounds, it just puts a greater strain on your knees, hips and lower back. James
Q:can i use cement to line my fish pond?
Deb In addition to what has been said, also check the ph level of the well water to make sure it is not acid or alkaline. Because it has come out of the ground, it can be a lot different to rain or river water. It also won't have much oxygen in it, so you might need an aerator or something to churn the water surface. Finally check the water temperature and make sure in the summer, the temperature doesn't make the water too hot to harm the fish.
Q:what is the best roof cement for roll roofing?
Blind Nailing Cement is the best choice. It is similar to roof cement, but has been thinned so that you can apply it with a brush. Nearly any asphalt based roof cement has the potential to be very messy, but with some care, you can minimize the mess. Be sure to get a brush designed for applying the blind nailing cement.

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