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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: So when i was younger my mum had footprints in the cement of my siblings and i at a certain time and i was wondering whether you have to buy a kit or just stick your foot in the cement. Thought it seemed a bit ricky putting one's foot in cement in case it stuck there or cement was stuck to it.: JoAnn Fabrics and Crafts

Q: I'm in my schools Senior Class Council and when i was a freshman we used to have this huge bonfire in the grass a week before Homecoming. But then our school was renovating and construction took place and it was discontinued for my sophomore and junior year because their was no place to have the bonfire with the construction taking place, but now that i'm a senior and the construction is over, i want to bring the Homecoming Bonfire back. If i dont bring it back, then our class will be the only class who remembers the Bonfire and it'll be forever discontinued. I talked to my teachers and deans and if i can figure out a spot and a safe way to have the bonfire, we can bring it back. The only viable area where we could have it is in the parking lot, but i need a way to have the bonfire without it scorching the cement. So do any of you yahoo answer users have any ideas on how to have this bonfire without it leaving scorch marks on the ground?: You would probably have to bring a couple dump truck loads of dirt and build up the dirt layer to about one foot thick and then have the fire on top of the dirt.

Q: I was washing paint brushes in a bucket with water the bucket turned to mostley paint and then the bucket fell on my pation floor which is cement now it wont come off!!!!!!: Why not just GO FOR IT and paint the rest of the floor?

Q: My contractor charged me $450 for cement for laying out 600 sq ft tile on the floor. He told me he used 27 bags. This is in addition to grout. Cost seems very high. How many bags is typically needed?Thanks a lot: Now, okorder

Q: my bottom part of my front teeth just fellcan dental cement help?oh..and it was root canal already..: Temporary cement won't unfortunately help that much. You can resin filling placed to bond the pieces together. However, the ultimate restorability of the tooth depends on how far down the crack extends.

Q: coal fly ash % used in cement?: Portland Flyash Cement contains up to 30% fly ash. The flyash is pozzolanic, so that ultimate strength is maintained. Because flyash addition allows a lower concrete water content, early strength can also be maintained. Where good quality cheap flyash is available, this can be an economic alternative to ordinary Portland cement.

Q: What is rubber cement and where can i get it?: such as potential of abuse as inhalants and fire. For this reason, as with any adhesive, rubber cement should be used in a well-ventilated area, and care must be taken to avoid heat sources as n-heptane and n-hexane are highly flammable. Rubber cement based on n-heptane is very popular and ubiquitous in the United States, but is generally unknown and unavailable as a consumer product in the UK and some parts of Europe, possibly due to the severe fire hazard of that formulation. A similar solvent based product called Cow Gum was common in the UK, but is no longer in production. Current solvent based options include Marabu-Fixogum and Platignum Studio Gum which are marketed in the UK and Europe. Copydex, a common latex adhesive in the UK, uses an ammonia and water solvent and needs no special handling, making it very child-friendly. While for this reason it is often given to children, it is also used in artwork, and finds widespread use in light D.I.Y. work such as fixing carpet tiles and repairing upholstery

Q: what're the important characterisitcs that is detrimental to the cement quality? is there a makeshift procedure/method that can be used instead to test for such characteristics?: There is a test to see how well you mixed the ingredients (water cement). I think it's called the slump test. This test is used to sample the mixture. There is a tool that looks like flat-top cone: . . . . . . . ____ . . . . . ./ . . . . . . . . . ./ . . . . . . . . . . ./ . . . . . . . . . the mixture is put in and the tool is removed. - if the mixture is stiff, you need to add water - if the mixture slumps too low, you need more cement - if the mixture slumps maybe an inch and a half, it's good ** Vibration and a dry enviornment during curing affects quality.

Q: please tell me which of them is toughest?And I would like to get to know some recipes for both of them in order to use them in my yard: Concrete is stronger. Cement is mostly used to make mortar using water,cement, sand. Where as Concrete has gravel in it to give it more support. Concrete is sometimes used when laying block. The concrete and rebar help to support the wall

Q: i recently removed the tilling from my basement floor and now my basement is just plain cement flooring. What are the steps i need to take to tile over it?: If you removed a ceramic tile either bu sure to scrape /break off existing thinset to get a smooth surface. Or you can use a self leveling mortar to smooth it out. You need a smooth clean surface to start out with. Then you can tile it.

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