Grey Ordinary Portland Cement 42.5r n grade

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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:CEMENT WAS POURED ON MY DRIVEWAY AND THEN IT RAINED 5 HOURS LATER?
Stephen is correct, it won't change the concrete's strength, but will probably give it a smoother finish than you would like. Contrary to popular opinion, concrete sets up, it doesn't dry.
Q:Is Cement Terrazzo an antistatic floor?
You don't buy it, someone has to be hired to custom make it on site. If you re=ask the question under do-it-yourself category, that you would get way more answers. Good Luck
Q:Roofing with modified bitumen base sheet and cement only?
I'm no expert, but I have the same kind of garage roof and I've had it done twice in 17 years with the rolled roofing and if it's done right, they didn't even use cement. I confess, the first time I fixed it myself and I did use the roofing cement. It was fine but I never did get the gutters on right, forgot the drip cap and so the back end of the roof rotted within 4 years. Eventually I had a handy man redo it and he did a better job that lasted for awhile, but a wind storm ripped it half off after about 6 years. My neighbors don't have nearly as many problems as I do with their garage roofs. In fact, I've never seen them repairing theirs. I'm actually in the midst of getting roofing bids myself, for the house and the garage. I've heard a lot about the rubber roofing on garage roofs but I've seen some bad reviews for that. I've gotten some good information from my city building inspectors on their opinions and they are unbiased. Good luck to you.
Q:South Building Materials Sandstone Cement, mostly transported by the canal from the north. Real estate downturn, will have an impact on the shipping of building materials?
Geographic bias in the local procurement, line of sight not only for the door that one or two cities, the province of outsiders to see this issue in the future was misled
Q:history of the development of cement?
Cement history Throughout history, cementing materials have played a vital role. They were used widely in the ancient world. The Egyptians used calcined gypsum as a cement. The Greeks and Romans used lime made by heating limestone and added sand to make mortar, with coarser stones for concrete. The Romans found that a cement could be made which set under water and this was used for the construction of harbours. The cement was made by adding crushed volcanic ash to lime and was later called a pozzolanic cement, named after the village of Pozzuoli near Vesuvius. In places such as Britain, where volcanic ash was scarce, crushed brick or tile was used instead. The Romans were therefore probably the first to manipulate the properties of cementitious materials for specific applications and situations.
Q:what kind of gloves do i use to handle cement?
This Site Might Help You. RE: what kind of gloves do i use to handle cement? I want to put the hands on the cement to shape it. I don't want any chemical contamination occuring where the gloves react in any way with the cement.
Q:Is the cement industry in the stock a separate plate? Or part of the other plate?
The cement industry is still a separate plate, building materials (bi1133) cement more, of course, all the plates are cross each other, you can choose the custom plate, the cement alone together to analyze.
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:Cement and its early uses and terms?
The word cement traces to the Romans, who used the term 'opus caementicium' to describe masonry resembling modern concrete that was made from crushed rock with burnt lime as binder. Cement comes from Latin caementum 'chips of stone'; cement is an ingredient of concrete. With this background information, and sicce your book has a medieval-ish setting, I would suggest using the term caementum when you describe the cellar flooring.
Q:know the cement but I want to know the exact definition in engineering view.?
Cement generally is a powder which when mix with water, chemically bonds with it and forms a paste and eventually hardens. Cement bonds aggregates (sand and gravel) to form concrete. When a steel is used to reinforce concrete, this is called reinforced concrete. Cement is used in plastering walls, filling hollow blocks, tile setting, floor screeding and others. Cement is always part of everyday life in construction from foundation to finishing.

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