Machine-translated by Google. Questions are authored in English.
Top

Discussion

If a paste is 30 per cent capillary porosity by volume and a second is 15 per cent, which will generally be stronger and roughly why?

  • A.the second, since strength falls sharply as porosity rises
  • B.the first, since more pores allow better curing
  • C.both equally, since porosity does not affect strength
  • D.the first, since water is retained for hydration

Answer: A

Strength depends steeply on porosity, so halving the capillary volume raises strength considerably. This is the underlying reason the water to cement ratio matters so much to the finished concrete. Porosity is the link between the mix design and the result.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.