Grade 42.5 R/N P.O CMENT

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I. CEMENT STANDARD

1.Vietnam standard (TCVN)

- Quality of Cement as per TCVN 6260 - 2009

2.European standard (EN)

- Certificate I -EN 197-1.2000- CEM II 42,5 R

- Certificate II - En 197-1.2000 CEM II 42,5N

- Certificate III - EN 197-1.2000 CEM I 42,5R

3.American standard (ASTM)

- ASTM C150 TYPE-1

- ASTM C1157 TYPE- GU

- ASTM C1157 TYPE- HE

II. SPECIFICATIONS FOR ORIDINARY PORTLAND CEMENT AS PER EN 197-1:2000/CEM II 42.5

Items	Units	Specification	Test Results	Test Method
SiO2	%	≤ 26.00	23.41	EN 196-2
Al2O3	%	≤ 6.50	5.50
Fe2O3	%	≤ 4.50	3.60
CaO	%	≥ 54.00	57.00
MgO	%	≤ 5.00	2.75
SO3	%	≤ 3.5	2.56
Loss on Ignition, (LOI)	%	≤ 10.00	7.00
Insoluble Residue	%	≤ 12	6.00
Physical and Mechanical Properties
Finess test				EN 196-6
- Blaine	cm2/g	≥ 3200	3800
- Retained content on sieve 75mm	%	< 15.0	0.10
Time of setting - Initial set - Final set	Minutes	≥ 75 < 420	145 200	EN 196-3
Soundness (LeChatelier)	mm	< 10.0	1.0	EN 196-3
Compressive strength	MPa			EN 196-1
2 Days		≥ 20.0	23.0
3 Days		-	27.0
7 Days		-	37.0
28 Days		≥ 42.5	50.0

Q:Explain why. Don't just give a yes or no answer. Full details: I do not. Because I do not.

Q:i need some info on CEMENTED CARBIDE, its cost, its manufacture process, availability, its uses and applications.plz help ! thank u !-ABISH: There okorder and search for carbide. Of course, there are other applications for carbide other than as cutting tools. Because it is extremely hard, it is uses as a bearing material, as extrusion nozzles, as sand blasting nozzles, for high temperature ball bearings, and many other things. Because carbide cutting tools withstand higher temperatures, they can operate at higher cutting speeds. This has enabled a relatively new form of machining aluminum, called high speed machining, in which large billets are aluminum are machined directly to the final shape needed, such as for aircraft parts. High speed machining eliminates casting operations (with the liklihood of defects such as voids and inclusions), as well as making complex assemblies by welding or rivetting smaller components. The result is higher quality with lower tooling cost. The development of carbide materials has changed the metalworking industry.

Q:cement industries: Although I am not first hand in the cement/concrete industry, water extends the tooling's life and most important, it keeps the dust down so you have a lesser chance of getting lung disease from the dust. I forget what it's called right now. We do a lot of core drilling in our line of work those are the reasons for the water.

Q:im 14 and im going to buy some weights for boxing,football,baseball basically for sports they have $60 100 pound golds gym cement filled weights im a beginner so do you think I should buy them because iron is too expensive and too young for gym: cement may work but they will not last because they break when dropped. you can get them as a starter set and change later.

Q:the crack is below ground level and the rain water is running a stream toward the drain. About twenty feet away is crack on basement floor: I noticed that you're stating a cement block wall. Your best bet (if you don't want to get too costly), is to purchase some hydraulic cement. You want it to be at a consistency that is a thicker putty. By doing this, you can press it into the crack firmly, and it will hold. Unfortuneately, if you're getting a lot of water, you may need to dig outside, down to the hole, and do your cement repair from the outside. Once fixed, you can treat the inner basement wall with drylock. (Water sealer).

Q:Is there a defoamer for building cement? What is it? Is there an introduction?: In the defoaming system, the pH value of the system is that many silicone defoamers have been demulsified, bleached, and the defoamer should lose its physical state Not only the defoaming force Or disappear, but also to the defoaming of the product behind the production process left unexpected drawbacks Yu Heng the series defoamer in this case can maintain a good physical state, not breaking the milk, broken bubble suppression effect but also stronger than at room temperature, defoaming quickly, foam suppression lasting, and non-toxic, tasteless , Will not cause any pollution to the environment

Q:i need to fill in a crack on our roof which is allowing water to get in to the house, the problem is that erea is always wet. at first i was tolled to use cement. then i read that concrete quot;hardensquot; when wet. so wouldn't that be better to use? its not a big crack so i wont need allot. so how long would it take to quot;dryquot;?: I think you may be confusing the materials. When they told you to use cement, they probably meant roofing cement which is more like a tar material. This is an appropriate material to fill a gap on a roof but may only last about a year. A roofer would be able to do more permanent repair. The other cement is actually a gray powder that is a component of concrete, but not suitable for a roof.

Q:I have built a dry stacked concrete block wall as a fence around our home. I am wondering if I should use premixed cement or mix it myself. What is the best mix recipe for a Surface Bonding Cement mix?: I'm not sure what you mean by a Surface Bonding Cement? What is it's purpose and how would you apply it? If it's a dry stacked wall why do you need cement?

Q:Like carving stone.: Yes and No Yes it can be carved, but no it isn't identical to stone.

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