| 共 2 篇文章 |
|
How Cement is MadeHow Cement is Made.The crushed rock is combined with other ingredients such as iron ore or fly ash and ground, mixed, and fed to a cement kiln.Cement is so fine that 1 pound of cement contains 150 billion grains. The cement is now ready for transport to ready-mix concrete companies to be used in a v... 阅46 转0 评0 公众公开 20-07-01 23:19 |
Cement and water form a paste that coats each particle of stone and sand—the aggregates. Through a chemical reaction called hydration, the cement paste hardens and gains strength.High-quality concrete is produced by lowering the water-cement ratio as much as possible without sacrificing the workability of fresh concr... 阅36 转0 评0 公众公开 20-07-01 22:55 |
