PORTLAND CEMENT P.O 42.5

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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:how can i buy cement?
Have you thought about making your own? the procedure is fairly simple and the binder is not expensive. You can find the procedures for making concrete on the Internet for all sorts of strengths from mortar to 10k compression crete. Depending upon how much you need this may not be viable. The weight of concrete is such that it makes shipping to other countries highly unprofitable or vastly expensive.
Q:How can you make cement boat float?
Just displace more water than the boat weighs.
Q:Is cement is better than concrete to build weights?
cement IS concrete when mixed with water Gravel -sand drys
Q:coal fly ash % used in cement?
You can specify any amout of fly ash you want. The fly ash is cheeper that other compounds so it makes the mix cheeper. Too much will hurt the strength.
Q:Could I use rubber cement for my project?
Well if you have rubber cement already great! But if you don't you'll need an ID
Q:should I be cement filled weights?
you are not to young for a gym most gyms just require you to sign up with one person over 18 then you can go freely by yourself.
Q:Price of laying cement?
Cement is pretty expensive when you add all the materials and labor. Depending on what you are looking at doing. Sidewalk can run you $250-$2000 depending on linear feet. A Driveway will probably be $5000+ depending on size. That gives you an idea...
Q:how much aggregate/ cement for a cubic meter of concrete?
for a 4000 lb. mix you will need 6 bags of cement (564 lbs.) 1,452 lbs. of sand and 1656 lb. of gravel...this is from the batch plant for 1 cu. yd. ...when i mix by hand , i mix by volume...1 bag of cement is 1 cu. ft...so for every 1 bag of cement i would add 3 cu. ft. of gravel and 2 cu. ft. of concrete sand...by the way i have yet to see a place the trucks cant deliver it...
Q:is cement bad for your skin or breathing it?
It is bad to smell but no unless you dealing with cement or pavement all the time, it isn't anything to worry about.
Q:Which is heavier wet or dry cement?
I am assuming you are referring to the weight of a quantity of cement mixed with the requisite water for molding (and not hardened) vs that same cement once it is in a fully cured (hardened) condition. When cement hardens (cures) it does not lose all the water which was originally mixed with it, some of the water remains permanently incorporated into the cement. This is because the active ingredient in dry (as purchased) cement is primarily anhydrous calcium silicate*. When the cement cures and dries out it is in the form of a hydrate of calcium silicate and this portion of the water stays in the cement forever. When we mix cement with enough water so it can be poured or molded, we are adding more than the exact amount of water necessary for the hydration process, so, some, but not all, the water evaporates and thus, the wet cement would be heavier than hardened cement. *Yes, there is sand, gravel, etc but these are just fillers, they just go along for the ride, they do not under go any chemical change during the process.

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