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:Where to buy Dental Cement in Montreal?
- I saw a tool on T.V. that fixes hard to fix things with a glue that drys under a blue light . I am going to try to fix my broken molar . It is 10 to 20 dollars depending where u buy it.
- Q:name four top quality cement brands?
- To answer your question it would be necessary to know in what area of the US you are located. The top four brands in the Mid West may not even be available on the east or west coasts. Although cement plants may be large in an area they quite possibly are not nation wide suppliers. As in business and housing most important is location, location, location. Check with a local concrete supplier and they will be able to provide an answer to your question. As a result of having to produce quality and consistent concrete the concrete suppliers typically use the top quality cement available in the area. But they usually limit their brand selection to one supplier, otherwise they would experience variations in quality of their concrete solely a result of the cement supplier. I provide to previous so you are not disappointed in only getting one quality brand in your area.
- Q:Cement and its early uses and terms?
- The word cement traces to the Romans, who used the term 'opus caementicium' to describe masonry resembling modern concrete that was made from crushed rock with burnt lime as binder. Cement comes from Latin caementum 'chips of stone'; cement is an ingredient of concrete. With this background information, and sicce your book has a medieval-ish setting, I would suggest using the term caementum when you describe the cellar flooring.
- Q:how to break a cement wall with fist?
- With practice. And A LOT of pain killer meds after.
- Q:what is cement ? this for a scince project we have to do this.?
- Cement is composed of five types of minerals such as limestone, shale, silica, pyrite and gypsum. Limestone were grounded from the impact crusher (mostly 1 cubic meter size) to as big as half the coconut shell, then it is will again passed through a jaw crusher from this size, it will be like 3/4. After this the lime stone will pass through the ball mill(a rotating drum consist of different sizes of ball metals) with other ingredients. The product will be like a face powder. (For Semi-dry process) This face powder like shall go through a tilted rotating pan, where a tricle of water will make a sphere size as size as a marble. This sphere size mixture shall pass through the calcining stage(this is removing the moisture in it). After the calcining stage, it will pass through a rotating kiln at a temperature of about 2,700 degrees celcius. This temperature is enough to burn and turn red your mixture(similar to volcanic lava). The product of these is like charcoal and what you call clinker. It will pass through the last process to make it cement. Another ball mill(mostly this is called the finished mill) and with the same texture(face powder like) and mixed this with gypsum then you got portland cement. Now are you ready to turn the soil into like a volcanic lava?
- Q:using cement in construction...........?
- Cement is produced with the main purpose of binding aggregate (sand or gravel) to make concrete or mortar. The aggregate adds to the strength of the mixture. Romans used a similar mixture to what we use today and a lot of it is still standing strong.
- Q:Is a Cemented or Uncemented Prosthesis Better?
- The response to this differs for various people. Because each person’s condition is exclusive, the physician and also you must weigh the pros and cons. Cemented substitutes tend to be more commonly used for older, less active people and individuals with weak bones, for example individuals who've brittle bones, while uncemented substitutes tend to be more commonly used for more youthful, more active people. Research has shown that cemented and uncemented prostheses have comparable rates of success. Studies also indicate that if you want one more hip replacement, or revision, the rates of success for cemented and uncemented prostheses are comparable. However, more lengthy-term data can be found in the U . s . States for stylish substitutes with cemented prostheses, because doctors have used them here because the late sixties, whereas uncemented prostheses weren't introduced before the late seventies. The main drawback to an uncemented prosthesis may be the extended recovery period. Since it requires a very long time for that natural bone to develop and fix towards the prosthesis, you aren't uncemented substitutes must limit activities for approximately 3 several weeks to safeguard the stylish joint. Also, it's more prevalent for somebody by having an uncemented prosthesis to see leg discomfort within the several weeks following a surgery, as the bone keeps growing in to the prosthesis.
- Q:how is strength of cement mixture affected when mixed with sand ?
- we assume the cement (Portland cement) is of the correct ratio. we also assume we are talking about compressive strenght when we have just enough cement to fill the spaces between the rock we have reached the maximum strength. number 2. is no good as it reacts with the cement mixture number 4. allows for compression and cracking of the cement. number 3. .....pits i dont know what is pits number 1. is the same as rock ......the best here so .... the order my guess ....... 2,4,1
- Q:is cement bad for your skin or breathing it?
- It is bad to smell but no unless you dealing with cement or pavement all the time, it isn't anything to worry about.
- Q:mixture of water and cement?
- The problems with cement is that it's a very Thirsty molecule. Could be all the water remains in the concrete. Concrete doesn't harden because it loses it's water - it hardens because of a chemical change (it's hot). Portland cement can harden under water - and the Romans understood this. Some of their bridges are still in use. Then the idea was lost until the end of the 18th century, I think.
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