Posting a message to the forum will remove the above advertisement

  1. laugh TilersForums.co.uk Tiling Job Of The Month Competition! laugh

    Vote on July competition by clicking HERE (click the thumbs up on the job you want to win!

    Enter in August competition by clicking HERE (click 'add your JOTM entry' and then 'add media')


     

cement

A cement is a binder, a substance used in construction that sets and hardens and can bind other materials together. The most important types of cement are used as a component in the production of mortar in masonry, and of concrete, which is a combination of cement and an aggregate to form a strong building material.
Cements used in construction are usually inorganic, often lime based, and can be characterized as being either hydraulic or non-hydraulic, depending upon the ability of the cement to set in the presence of water (see hydraulic and non-hydraulic lime plaster).
Non-hydraulic cement will not set in wet conditions or underwater; rather, it sets as it dries and reacts with carbon dioxide in the air. It is resistant to attack by chemicals after setting.
Hydraulic cements (e.g., Portland cement) set and become adhesive due to a chemical reaction between the dry ingredients and water. The chemical reaction results in mineral hydrates that are not very water-soluble and so are quite durable in water and safe from chemical attack. This allows setting in wet condition or underwater and further protects the hardened material from chemical attack. The chemical process for hydraulic cement found by ancient Romans used volcanic ash (activated aluminium silicates) with lime (calcium oxide).
The word "cement" can be traced back to the Roman term opus caementicium, used to describe masonry resembling modern concrete that was made from crushed rock with burnt lime as binder. The volcanic ash and pulverized brick supplements that were added to the burnt lime, to obtain a hydraulic binder, were later referred to as cementum, cimentum, cäment, and cement. In modern times, organic polymers are sometimes used as cements in concrete.

View More On Wikipedia.org

    Recent Content Tagged With cement

  1. Ardorban
  2. callatiler
  3. Jack
  4. Andysblacksoul
  5. Stuart Williams
  6. Madfuller
    Thread by: Madfuller, Feb 20, 2017, 2 replies, in forum: Tiling Forum
  7. Madfuller
  8. jonnyc
  9. Aston
  10. hipposgobeserk
  11. ISOMAT UK
  12. ISOMAT UK
  13. ARC123
  14. Protiler 68
  15. andy-p
  16. pk911
  17. Moffat12
  18. LizF
  19. assegayer
  20. Girish K Sawhney
  • Find a Tiler Post a Job Ask a Question Tile Events Tile Pics Blog Adhesive Poll Handy Downloads