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:I need to relate cement with technology...?
- Well, you see, good cement/technology is strong, and much better and more useful things can be bulit upon it, but weak cement/technology doesn't last long, and nothing good can be built on it.
- Q:What paint do I use to paint over cement render?
- First, try using a power washer in the 2000 PSI range to take off the old paint. If it comes off (or most of it, anyway), let the cement dry for a couple days and then use a concrete primer before applying a color coat specifically made for concrete. The primer is especially acidic, so it really soaks into the cement (and it doesn't go very far, because so much soaks into the concrete). The concrete color coat is then designed to hold onto the primer and provide a solid moisture barrier. If the old color won't come off, don't worry. Just clean it up as best you can before applying the primer and paint. And, use top name brand paints (like Dunn-Edwards or Sherman Williams). The more expensive products will cover better and may actually be cheaper in the long run (less coats and time to paint).
- Q:I want to glue acrylic sheets to cement? What should I use?
- Cement is a generic term for any kind of glue. If you mean concrete, inquire at a masonry supply store about surface treatments. They have some sort of epoxy coating for that.
- Q:what r the raw materials used to make cement?
- Lime, sand and water.
- Q:How to dissolve hardened cement in a plastic/ PVC pipe?
- Acid will 'eat' cement, but not PVC. it takes time though. You might need to power flush the sand that will be left behind.
- Q:What is Rietveld method &its application in cement industry?
- The Rietveld method uses a powder sample instead of a large single crystal to determine crystal structure by X-Ray Diffraction. This is important in the cement industry because cement is a powder and not crystals of any size. This is useful in determining the quality of the product and adjusting burning conditions in real time. Several different software packages have been developed for this technique.
- Q:Price of laying cement?
- the national average for placing formwork is about $0.95 per linear foot and the average for placing an finishing is about $0.40 per square foot. Concrete NOT included. So a 10' x 10' concrete slab would cost about $40 to form and about $40 to place and finish and would require about 3 cubic yards of concrete at about $100 per cubic yard. Most of the time there is a min. of 5 cu. yard purchase and a finishing company will have a min. charge of about $400 if the job is under 400 sq. ft. This is a ROUGH idea
- Q:Due to rising prices of building materials, and the impact of the progress of the project, need to make a report, such as how to write
- And then in accordance with the material price after the contract price and contract agreed to explain the need to increase the cost of the reasons
- Q:what is the difference between pozzolan and portland cement. is it true that pozzolan is better in wet areas?
- Yes. Type IV Portland cement is generally known for its low heat of hydration. This cement is used for very large concrete structures, such as dams, which have a low surface to volume ratio. This type of cement has not been made for many years, because Portland-pozzolan cements and ground granulated blast furnace slag addition offer a cheaper and more reliable alternative. These classes differ from the ASTM classes. I - Portland cement: Comprising Portland cement and up to 5% of minor additional constituents. II - Portland-composite cement: Portland cement and up to 35% of other single constituents. III - Blastfurnace cement: Portland cement and higher percentages of blastfurnace slag. IV - Pozzolanic cement: Portland cement and up to 55% of pozzolanic constituents. V - Composite cement: Portland cement, blastfurnace slag and pozzolana or fly ash. Read the links below for more details.
- Q:I can not remove old cement board what do i do?
- Sure - you could do a hole-patching with thinset - you might put in a little fiberglass mesh too. I can't imagine why that wouldn't work just fine.
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