Discoloured blotchy concrete
Discoloured blotchy concrete
(OP)
Hi,
I was hoping somebody might be able to shed some light on how the concrete in the attached photos has ended up blotchy (see attached photos) and how we might avoid it in the future... There was no issue during the pour of this sample panel but the discolouration has got us all stumped.
Thanks in advance, Jonny
I was hoping somebody might be able to shed some light on how the concrete in the attached photos has ended up blotchy (see attached photos) and how we might avoid it in the future... There was no issue during the pour of this sample panel but the discolouration has got us all stumped.
Thanks in advance, Jonny





RE: Discoloured blotchy concrete
RE: Discoloured blotchy concrete
The pour is fresh - these photos were taken within a day or 2 of the formwork being removed. It is something that I haven't come across before and I am concerned that we will have the same issue when it comes to pouring the permanent works.
RE: Discoloured blotchy concrete
RE: Discoloured blotchy concrete
Are the forms steel-faced?
RE: Discoloured blotchy concrete
There is also a likely contribution from the inconsistent application of form release. This can either trap or release bleed water at the surface interface, depending on the texture of the form surface, thus presumably, the reason for Ingenuity's question about the form material.