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's the difference between concrete and cement?
- cement is pure cement concrete has cement and gravel and sand and other similar things in it
- Q:how to estimate the # of bags of cement, sand & gravel...?
- if you mean cement sand AND gravel then the answer could be anything if you mean cement sand or gravel then i guese you would take the volume and devide it by how much one bage covers in volume but if you don't know how much volume one bag covers than you can't solve this problem with only knowing the volume of the project
- Q:What are the building materials used in the construction of agricultural infrastructure?
- Can be divided into structural materials, decorative materials and some special materials
- Q:what would happen to a person who is covered in a tub of wet cement?
- The person would die painfully and pretty quickly. As soon as the cement started to harden, the cement would crush the ribs, probably jabbing the heart or other vital organs. If, say you did live through that... You're still stuck in a tub of freaking cement.
- Q:should I be cement filled weights?
- cement may work but they will not last because they break when dropped. you can get them as a starter set and change later.
- Q:What are the similarities and differences between non - hydraulic cement and hydraulic cement?
- Hydraulic cements are materials that set and harden after being combined with water, as a result of chemical reactions with the mixing water, and that, after hardening, retain strength and stability even under water. The key requirement for this strength and stability is that the hydrates formed on immediate reaction with water be essentially insoluble in water. Most construction cements today are hydraulic, and most of these are based on Portland cement, which is made primarily from limestone, certain clay minerals, and gypsum in a high temperature process that drives off carbon dioxide and chemically combines the primary ingredients into new compounds. Non-hydraulic cements include such materials as (non-hydraulic) lime and gypsum plasters, which must be kept dry in order to gain strength, and oxychloride cements, which have liquid components. Lime mortars, for example, set only by drying out, and gain strength only very slowly by absorption of carbon dioxide from the atmosphere to re-form calcium carbonate through carbonization.
- Q:about building blocks made from soil with cement?
- You need to have a soil type that has the consistency of sand. Anything dry and grainy... Stay away from clayish substances where the soil tends to stick together because the cement cannot go through them. Usually the ratio I can give for a good building block is about 6 parts of sand, 2 parts cement and 1 part of water (or less depending on the consistency). It should feel like the consistency where it can be easily molded but not soggier than brownies. Use portland cement...
- Q:about laying blocks what kind of cement do you use
- If you are laying concrete blocks (cinder blocks) for a block wall then you put motar between the blocks as you lay them. Mortar is a cement and sand mixture. You can buy motar mix at the hardware store. Cement is powder substanse that is used to make Concrete and Mortor. Concrete contains Cement, Aggrigate (rocks), Sand, and Water. People often refer to a sidwalk or driveway as being made of cement. Technically this is incorrect. Sidewalks and driveways are made out of Concrete. Cement is just one of the ingediants in concrete.
- Q:cement, concrete or other please help......?
- a good mix of 3 sand 1 cement at least1,5 inch's thick point seal the fire cheeks with fire clay should do the trick allow to dry well before lighting fire
- Q:[airfix question] is liquid poly basically poly cement but more runny?
- Liquid poly is very liquid, it's useful for brushing onto large, flat surfaces or for very, very tiny parts, but generally normal poly cement is the thing to use. Never squeeze the tube! If you have to squeeze it means the nozzle is blocked; unblock the nozzle with a pin and hold the tube downward with the the the tiniest amount of pressure until the glue starts to flow. If you squeeze, there will be a 1 minute delay but then it'll come pouring out. Don't use poly cement unless you are sure you want a permanent weld; if you want a bond that can be broken apart (useful when you notice an error) use superglue or a hybrid epoxy. I use Zap-A-Gap quite a lot.
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