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
Loss on Ignition, (LOI)
Physical and Mechanical Properties
- Retained content on sieve 75mm
Time of setting
- Initial set
- Final set
- Q:what is the best kind of cement for filling cracks in foundations?
- Filling cracks with cement is futile. If you are filling a form tie hole then hydraulic cement is the choice. For cracks, use an epoxy filler.
- Q:Is cement poisoness? Flammable? Explosive? Corrosive?
- Cement is not poisonous (since it is made from burnt stone) but I have never heard of anyone tempted to eat it. It is definitely not flammable (and is used for fireproofing over steel beams). If there is a great cloud of cement dust in the air in an area that has a source of ignition that dust could explode (not very common and only applies to the dust.) It is mildly corrosive when wet before it cures (only a problem during first few days after pouring it).
- Q:Can you lay cement board in order to put vinyl flooring?
- Installing Vinyl Flooring On Concrete
- Q:What exactly is Oilfield cement?
- I have never worked in the Oil Patch, but I believe oilfield cement is a mixture of sand, aggregate and a barium compound (barium carbonate, maybe). If you look at the Periodic Table, you will see that barium lies under calcium, and has the same properties (more or less). Since barium is denser, when an over-pressured oil reservoir is breached, this mixture plugs up the drill hole until the well can be capped. This is a major use of the element barium.
- Q:refinish stain and seal a cement floor?
- Are you asking about the process? Clean the floor first. If you use a high grade cement/garage floor paint, such as an epoxy base the sealer is in the soulution. No offense, but it makes no sense...TO ME, to do a multi step process. Steven Wolf If you insist on a stain, it should be an acid etch bases product to actually STAIN, not just coat, and don't even bother with any latex based products.
- Q:cement flammability?
- Cement powder is not flammable or explosive. If it were, there would be a hazardous material symbol on the silo. There are other reasons to clean up the dust, such as the fact that breathing the dust may be hazardous and that it may be required by law. If they cut into the silo, then slag may contaminate the cement. Your best bet is to do a search on Material Safety Data Sheet Cement.
- Q:What is use to dissolve cement?
- What you need is a cold chisel and a hammer. This will easily chip the cement away, then you re grout it afterwards. Chemical dissolution would leave large stains, plus you would need hydroflouric acid (not hydrochloric) which is very dangerous. Hydrochloric does dissolve cement, but you are actually talking about grout, which is different. Cement is a misnomer, commonly misused to describe concrete, mortar, and grout. You could also use a diamomd boart saw, which you can rent at an equipment rental place. You might be better off choosing a hiding place under some wooden flooring, it is a lot easier to remove wood without leaving a visible mark.
- Q:how do you resurface cement steps?
- First check the quality of the cement, it may be inferior to construction standards. When you determine it is good, then you need to rough up the surface with a tool like a chisel to give the new surface a grip. Mix a screened sand with some portland at a 2 to 1 mix and trowel it on with a steel finishing trowel
- Q:Do Filipinos prefer cement houses to wooden houses?
- The preference for concrete homes (made of CHB) is logical: 1. Concrete homes are stronger and won't fly away when a strong typhoon hits, and we do have a lot of typhoons every year. 2. Concrete lasts longer than wood that rots and can be damaged by termites 3. Wood is more expensive than concrete.
- Q:Do you think another cement plant should be built?
- I dont understand what you mean? We have many cement plants and we use the stuff because its fairly cheap and does a great job. The thing about cement is that its very expensive to transport so most cement companies will setup shop near a port or rail transportation (since those are cheaper than by truck) and will setup near where it will be used a lot. I dont think there is a shortage, there's naturally plenty of stuff to make cement.
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