Latent hydraulic - Declaration

02-22  Source: Network gathering  Views:7 

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Latent hydraulic - Declaration

Latent hydraulic additives can prevent cracks.

Meaning de terms latent and hydraulically

  • Hydraulic goes back to the ancient Greek word Hydor, ie water. The precise meaning may be different depending on the context. In physics, it is generally to the flow behavior and the transmission of energy in liquids. In chemistry, the ability of substances to react with water. In building materials it is a term is used in connection with binders. As hydraulic binders will those referred, which can harden under water.
  • The term "latent" is due on Latin latens and means to be hidden, so hidden or not obvious.
  • The term latent hydraulically refers to substances that can cure under water, but only if mixed with other substances. So you have hydraulic properties that are hidden until a suitable excitation triggers this.

Worth knowing about binders

  • The binders are substances are bonded by the fine particulate solids, either with each other or with a base. The funds may be liquid, for example, glue or fixed. The solid binder are generally powders which are mixed with water. You know the plaster or cement.
  • In construction, these binders are according to the conditions under which they cure, divided. There are no hydraulic, hydraulic and latent hydraulic means.
  • They do not know hydraulic binders presumably under the name "air-curing". Plaster or latex paints cure only when they are dry. Underwater these products remain soft.
  • Cement is a hydraulic binder. It is hard even when wet. A wall of cement hardens even in the rain or even underwater.
  • As latent hydraulic, for example, pozzolana, so volcanic earth, called. These do not cure after mixing with water. When you mix these products with calcium hydroxide or cement, they cure as hydraulic binder.
  • In practice latent hydraulic means are usually added to hydraulic binders in order to modify their properties. If you mix cement with pozzolan, it hardens slowly, which prevents stress cracking. The addition increases the water resistance and the resistance to salt. Likewise, the blooming is prevented. The disadvantage is that curing can take a long time. Depending on the composition, it requires months or years.
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