4 ms·

cement and concrete are different materials

• chm 12y ago
  But you need cement to make concrete.
  • DanBC 12y ago
    Yes, but if you're comparing usage across countries you probably want to compare the same thing; either concrete or cement.
    • chm 12y ago
      Indeed but if you want a pretty good estimate you can just whatever mixing factor is most common in China or the US and convert :)
• LeonRobrotsky 12y ago
  For anyone else that's curious, cement is mixed with water and some sort of aggregate to make concrete.
  • spikels 12y ago
    Don't forget the sand, which is technically an aggregate[1]. Using the wrong sand is a classic mistake being rediscovered in China: http://www.wired.com/2013/03/poor-quality-chinese-concrete-could-lead-to-skyscraper-collapses/ http://www.wired.com/2013/03/poor-quality-chinese-concrete-c... [1]-The concrete recipes I remember always had sand and rocks, gravel and/or pebbles (depending on local availability)
    • jacquesm 12y ago
      Yes, you want coarsely crushed ('sharp') sand, not sand that has better decorative qualities.
• maxerickson 12y ago
  If you want to be real careful you should say Portland cement. (because, for instance, the bitumen in asphalt roads is also a cement)