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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 am putting tile on the wall in my bathroom (not in the shower), do i have to put cement board behind it?or can i just leave the drywall that is already there?: I would highly recommend doing it right and using cement board. Try to avoid using any type of plywood for a substrate to attach the tile too. Ceramic tiles can be installed directly on drywall, plaster, or if they are in moist areas, onto green drywall or even better cement backer board. Cement backer board is actually made from a fiberglass mesh and Portland cement, so moisture won't bother it at all. It is available in 1/2 and 5/8-inch thick sheets (similar to drywall), and is usually sold in 32 or 36-inch wide panels 5 or 8 feet long. for other information check my source site

Q: gieve the perfect ratio separately for walls, concretes..: I would use gravel and sand. For a 1 cubic yard concrete mix, use the following: 600 lbs cement 1250 lbs gravel 1650 lbs sand 45 gallons water (about 375 lbs) If you have to use all sand, then just use a 5:1 ratio and use a water to cement ratio of about .6 (6 lbs water to 10 lbs cement) This will put you at about 3000 psi. Don't add too much water as your strength will drop a bunch. Easier way: Just call the local concrete batch plant and ask for 3000 psi concrete. I would also call a local engineering firm to send someone out to take some concrete samples to make sure you get what you ordered. It'll cost a couple hundred bucks for the concrete tests, but it's worth it if you are building a house which will cost tens if not hundreds of thousands of dollars.

Q: for patio what ratio cement +sand+gravel: I use a 5 to one ratio (five parts gravel, one part cement) the gravel is 60/40 (I assume that is 60 percent sand, 40 % rocks) The moisture content of gravel varies, so difficult to give amount of water.

Q: What did it cost? Is it worth the extra expense over vinyl?: I have been installing some on my house. I love mine and I doubt I will have to worry about my siding again in my lifetime. Very sturdy stuff. Mine was $26 for a 4x8 sheet.

Q: my boyfriend wants the jordan black cement 3's from 2011 do u know the price of them and where i can buy them ? thank uuu :): Probably the most common occurrence and issue out there is having gum stuck on your shoes. There are time when it comes right off, then there are times when it's a desperate struggle to remove every single sticky bit of it off your shoes. The Air Jordan 3 has had a big year with some much loved, classic colorways returning to NikeStore, as well as a new edition especially for this year. Launching on Black Friday is the next installment the iconic Black/Cement Air Jordan 3 Retro. With big-time innovation and lethal good looks, the Air Jordan 3 was the first shoe designed by Tinker Hatfield and features visible Nike Air and elephant print alongside the introduction of the iconic Jumpman logo. The launch of this shoe was the first time Spike and Mike hooked up and Mars Blackmon started hitting TV screens around the world.

Q: How does cement work?: It owes both name and origin to a British stone mason named Joseph Aspdin. In the 1820s, Aspdin’s quest for a manufactured counterpart to natural or Roman cement (derived from volcanic ash and other naturally occurring minerals) led to his discovery and patent of portland cement. Aspdin’s name for his invention served two purposes. It distinguished the material from Roman cement, which existed for centuries. It also was a marketing ploy. Concrete made from his new cement resembled a highly prized building stone quarried on the Isle of Portland.

Q: i have to get 2 yards of cement from a quot;shortloadquot; truck to the back patio area in 20 minutes is this possible. approx 80 feet away: That depends on the size of the wheelbarrow. For example, my wheelbarrow holds four [4] cubic FEET. A cubic yard is 3 feet on a side, thus 3x3x3 which equals 27 cubic FEET in a cubic YARD. Therefore, for MY 4 cubic foot wheelbarrow it would require 7 loads [27 divided by 4] to move one cubic yard of cement.

Q: doing a red brick fireplace at home.what sand/cemnt ratio should i use?: mortor cement is used for brick.1 cement,3 sand.1/2 shoval portland.you dont need portland if you don't have it.

Q: The bottle on elmers rubber cement has a warning not to use if pregnant or contemplating being pregnant, and I am 5 weeks, what could the side effects be? I used it for aprox a half hour of time.: The fumes are toxic and dangerous to anyone, and can cause brain damage. In pregnancy, inhaling toxic substances can be dangerous to the fetus. The chemicals are absorbed through the blood vessels in your nose, and then go through your blood to the placenta, and then into your baby's bloodstream. In general, pregnant women are advised to avoid harsh, strong smelling chemicals. Many can cause birth defects. It would probably take more than just a short exposure, but who knows? Why take the chance?

Q: Im in the middle of a renovation and the tiler has told me that Natural stone tiles 18x18 should not be installed on a cement board wall that has been primed. This application is for a shower/steam room. He has told me that i should rip down the cement board and replace with new unprimed boards. Any advice. The tile is planning on using Flextile 52. Please advice if the boards need to be replaced. The cement board has had the screws and joints covered with drywall cement and then the entire wall was painted with drywall primer sealer (latex).Thanks: from what ive heard, the mortar wont bond to paint properly

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