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: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:what is the hard, cement like covering that has been painted over brick walls of basement?
It's a special type of waterproofing finish that is meant for block walls--probably a type of stucco with added plastic compounds that make it impervious to water. You can't use joint compound---it's not meant to be applied over block, stone, or brick. You have to use a grout-like substance--something that contains an adhesive to make it stick, and some additional ingredients to keep it from absorbing water. Go to your local box store, hardware or construction store and ask them what they would recommend--take a piece of the chipped off stuff with you so they can identify what is already on the walls. Then use a waterproof basement paint to finish it off after you patch. I gotta tell you, though--if you have a problem UNDER the stuff now, (because it's bubbling and cracking) you won't get rid of that problem by patching--you may have to get a pro in there to waterproof and seal the block from scratch. And that's a lot of $$.
Q:Looking for ideas on pouring a cement bartop?
Make bowls in the cement for pretzels. How about having people write things in it when its wet? Maybe set in different types of wood, like cherry. How about small holes at the ends that lead to garbage cans.
Q:Which did the Romans invent? Concrete or Cement?
Cement
Q:Can cement be mixed with sea water?
Yes, but it changes the chemical properties of the cement.
Q:How do I stop sweating cement floors?
stop sweating cement floors
Q:is cement a natural resource?
Is Cement A Natural Resource
Q:How do I get cement dust off my vinyl flooring?
The cement is doing what it should. A previous questioner had trouble with the concrete floor in his garage. He spilt some vinegar on the floor and found it had eaten the surface the next day. If you can convince your wife to let you have some for an experiment ??? Beware vinyl stained by vinegar and swapping one problem for another. GL>
Q:Is blacktop or cement cheaper? I have a gravel parking space that is about 10 ft long and 30 ft wide.?
Cement is ALOT more expensive. Personally I like the looks of blacktop more. The maintenance is cheap and easy . . . and oil and stains blend in more. Plus if you ever want to remove it . . . blacktop is alot easier to remove. For that size . . . I would go with blacktop for sure. For both cost and maintenance benefits . . .
Q:What is cement used for?
What Is Cement Used For

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