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: I want to determine the percentage of Chloride present in any cement. Then can any one tell mePl., the standard method of determination of percentage of chloride in any type of cement.: figure out what the cement is made of in terms of chemical formula. use Cl5S2 as a rhetorical example *by the way, thats way off, divide the number of chlorine by the the total number of atoms in the formula. so in the example, its 5/ (5+2), which is about 0.714, so in the example there is 71.4% chlorine/ chloride

Q: I have a crown that keeps coming loose and the dental cement does not seem to keep it attached. My husband seems to think I should try to super glue it back on. I think he is sniffing the super glue. What do you think?: Super Glue Crown

Q: The cement i found is in 25kg bags (?5.98 each). The floor i think will be 4 inches thick??? or any suggestions please.: I disagree with the 1 bag => 1 sq ft. I bag of cement will make more than 1 cubic foot of concrete... and exactyly how much it will make is dependent upon the mix, the proportion of cement:gravel:sand. A meter is slightly more than 3 1/4 feet. A square meter is about 10.6 ft^2. You want to cover3m x 2m = 6 m^2... which is 63.6 ft^2. 4 thick is 1/3 of a foot thick. You need about 21.2 cubic feet of concrete. I think a bag of cement is a cubic foot of cement. A mixture might be something like three units of cement, 6 units of gravel and a couple of units of sand. Most of the final volume will be from the gravel. This mix would yield somewhat more than 2 cubic feet of concrete for each bag of cement. It looks to me as though you need 10 bags of cement to make 21+ ft^3 of material.

Q: We are in the middle of a kitchen remodel. We removed the old linoleum floors and there are wood planks that run north to south. Currently, this layer is flush with our living room wood floors. From the basement, you can see that there are boards that run west to east where the kitchen is.My question is, if I remove the wood planks that run north to south, can I put down a layer of cement board and just start tiling over the west to east boards? Will the weight be a structural issue? I would leave the north to south boards, but I'm worried about a tripping hazard being presented when I put down cement board, grout, and 1/2quot; tile (would probably be 1quot; all together). Trying to stay away from ramps, also. Thanks.: Are you saying there's 2 layers of boards on top of the floor joists? If yes then removing the top layer would be the way to go if the bottom sub-floor layer is strong enough to not be springy under concentrated loads or if you can beef it up by installing bridging underneath between the joists. If the sub-floor is the only layer then you'd not want to remove that since the structural integrity of the house would be affected and the cement board wouldn't be properly supported.

Q: What would happen if someone where you flush cement mix down the toilet and should I do it.: No you shouldn't do it. Surely there is somewhere else you could put it - anywhere would be better than down a toilet.

Q: hi i know how cement is made. my main question is when do we use cement entirely? for instance, concrete is used to make roads etc. similarly, in constructing a 10 floor building, do we concrete in all the 10 floors or is concrete used only in foundation and pilings/pillars etc? is cement used only as a smoothing agent or as binding agent in making brick walls etc.thx: you use concreted to cover a person in.. You use cement to make shoes for a person out of tide boxes then you throw them in the water...

Q: what's the difference between concrete and cement, and what are they used for?: Cement is heat treated limestone. More properly called Portland Cement, after the guy who perfected the technique. Tho this stuff has been around for a very long time, used extensively by Roman Empire. The heating of the limestome drives off the water and allows a chemical reaction to take place when water is added. It gives off heat when curing. Concrete is cement with added stuff, aggragate and is used for many things. Most often seen as driveways and walls. Depending on what you add to it it can be used to make boats too.

Q: We are a mechanical and electrical materials limited company, the general taxpayer. Now want to increase the operation of cement, is to fill in the application of cement or building materials? If it is a filler material is not it will include a lot? Do you need a prerequisite approval for cement? What are the specific steps? More: You do not need to pre-approved approval (including cement enamel to wear Fendududui fight), so that if you have to sell steel, then you do not need to increase the scope of the business.

Q: I am looking forward to building a block fence. I ran into a YouTube video on the Quikwall surface bonding cement and was curious on your thoughts about that product. Have you tried it? On what and what do you think about it? Thanks!: This Site Might Help You. RE: Your thoughts on Quikwall surface bonding cement.? I am looking forward to building a block fence. I ran into a YouTube video on the Quikwall surface bonding cement and was curious on your thoughts about that product. Have you tried it? On what and what do you think about it? Thanks!

Q: if i filled a balloon with air, covered it with cement, waited a few hours, deflated the balloon, pulled the balloon out, could i create a hollow cement sphere?????: My guess would be no. Cement hardens by chemical reaction to water and the curing cycle generates heat. I would wager that a latex balloon would not be able to withstand the heat.

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