• PORTLAND CEMENT P.O 42.5 System 1
  • PORTLAND CEMENT P.O 42.5 System 2
  • PORTLAND CEMENT P.O 42.5 System 3
PORTLAND CEMENT P.O 42.5

PORTLAND CEMENT P.O 42.5

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Min Order Qty:
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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



Q: ok, can the mixture of sperm and female ejaculate cause you to get stuck if no cleaned up for hours?
Of course! This is how they make cement. Why do you think so many people want to get a job at a cement factory?
Q: what happens if i run on cement for 25- 30 mins for 3 times a week?theres not much place where i can run on grass though there is a little park that i can run back and forth continously will that be better than running on cement for 25 - 30 mins for 3 times a week?I know its bad for your knees but what happens when you keep running on cement?
since cement is very hard, the impact of the foot hitting the ground will be much harder and this is not a good thing. it will detoriate the joints in both your ankles and your knees. and you are at greater risk of getting small stress fractures in your shins (shin splints) which are quite painful. i do not suggest running on cement as it can have increased damage to your joints than any other running surface. if there is a track at a school that their is access to or something similar i would suggest running on that.
Q: My cat has urinated on the cement basement floor around the area of the litter box. It is my fault for not cleaning the litter box right away, but now I have a problem! I have tried dousing the area with vinegar and letting it air dry. Any other suggestions?
There's okorder and type in 'removing pet urine from concrete floor' and you'll find things that work. Vinegar isn't going to do it.
Q: 13 inch diameter solid concrete stone - yes it will be heavy = approximately 90-95lbs.
If you are using only Portland cement and water in the 1:4 ratio for the reaction to complete properly, you will need 80% cement by volume. Very few applications use pure Portland Cement however. V(sphere) = (4/3)(pi)(r^3) r = d/2 = 6.5in V = (4/3)(3.14)(6.5^3) = 1150in^3 1150in^3(0.80) = 920in^3 of Portland cement One sack of Portland cement (94 pounds) is approximately 1 cubic foot which is 1728in^3 920/1728 = 0.53 or about 1/2 sack or 47 pounds of Portland cement. If you are using the traditional 1 : 2 : 3 mix of cement:sand:gravel, you use 1/6 cement, or 47/6 ~ 8 pounds. At 80% due to 1:4 water mix = 8(0.80) = 6.4 pounds. At 133 lbs/ft^3 or 0.077 lb/in^3, 1150in^3 weighs: 1150(0.077) ~ 89 lbs Your answer is then either 47 pounds of pure Portland Cement or 6.4 pounds as part of a 1:2:3 dry mix combined with water at a rate of 1:4 (the latter is the practical answer). 6.4/94 ~ 1/15 sack. Remember that these figures are based on general rules of thumb and do not take into account any particular service requirement. - .--
Q: Was the gulf oil leak sealed with cement as stated, or was it concrete?
In the oil industry it is known as cement. Granted, there are non-cement constituents, but there is no aggregate as the concrete that we're most familiar with has. The cement has to flow through small gaps and can't have rock chunks in it. The cement used in the oilfield also has a number of other additives to control such things as setting time and flow characteristics (called rheology).
Q: There is no mosaics cement in our country..... Advice me please
(A)For outdoor work the ideal adhesive to use is cement based. Either a cement based tile adhesive or a sand and cement mix. Of course the tile adhesive MUST be both water-proof and frost-proof. Cement base adhesives can be bought in bags from 2kg up to 22kg. They must be mixed to a firm consistency and applied to a dry surface. Your mosaic tiles are then pressed into the mortar to give a good contact. Work with a small amount at a time as you will normally have about 20 minutes working times with each batch. To help improve the flexibility and adhesive properties of the mortar add a plasticizer or polymer additive to the mix one part additive to two parts water. This is the preferred mix if you are making a mosaic for a predominantly wet location. Add this to the cement until the required consistency is reach. If using sand and cement mix use the ratio 3 or 4 parts fine sand to 1 part Portland cement. Mix thoroughly and add water. Mix to the required consistency. It is advisable to wear gloves whenever you are dealing with cement based products. To improve the adhesive and strength properties of the mortar, the setting time should ideally be long and slow. So if you can cover each days work with a polythene sheet to protect the work and help the setting.
Q: When installing cement backer board, is it necessary to put down some thin set mortar and then lay the board and screw in place, or can I do without the thin set?
Backerboard is used to stiffen the wood subfloor when you lay tile. This is important so the subfloor doesn't deflect when additional weight is put onto it (thus, breaking the tiles). Since you have a cement floor, putting down a backerboard wouldn't make any sense, but the floor does need to be level. You can pick up self-leveling compound at the hardware store. It's going to be in the same aisle as grouts, tools, etc.
Q: Here in the US they use sheet rock and the houses are so flimsy, but in DR they build them so strong and it's 100% cement. Why is that?
I think the main reason why in the united states houses are not made of cement is because of the price. Is a lot more expensivr to make a cement house rather than other materials. Also depending on where they are being made. In the north houses are made of different materials in order to protect them from the cold. In most of the caribean countries air conditioning is a luxury that only the rich are able to pay, i believe cement houses cool down faster...
Q: I want to open building materials store main cement: tiles and the like. How much money to invest in the root. Store area of more than 100 square feet
Want to open a cement store about how much investment
Q: I was going to tile a bedroom and was wondering if I could use glue on cement board, if so is there anything special that I would have to do, or any certain type of glue to get?
Rig_46, You can use adhesive for tile to hold the tile to the wall. But I don`t recommend to do that because over time the adhesive will dry out and possible have some or all of your wall tiles to fall off the wall. I just took out some old wall tile in my bathroom that was just what you asked about and the tile came off the wall very easy. The glue pretty much stayed on the wall but the tile came(or almost fell) off very easy. Just giving you a heads up on some issues I had. Then use 'thin-set' to install the tile to the concrete(cement) board. Then grout it and your done an done right. Hoped this helped. Good Luck.

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