FAQ for Concrete Mixing Problems: If you have a question or answer you'd like to see listed here, please contact us.
- Problem: Lots of pinholes in concrete or GFRC facecoat using Polyplex in the mix design.
- Solution: Typically this is the result of
mold release, and if spraying GFRC Facecoat; gun pressure settings, spray technique and slump. If Polyplex has been stored in direct sunlight or at high temperatures with
the lid off, the de-foamer can evaporate out of the Polyplex, which will result in the air content of the concrete/GFRC
mix to rise dramatically. Nine out of
ten times, mix temperature ends up getting too hot (above 74 F) causing a rapid loss in slump and pinholes in the concrete surface. Keeping mixes below 74 F, using COLD water and/or ice in the mix to control temperature will help solve this issue. Also, keep the lid on the Polyplex container during mixing, and out of direct sun or hot areas.
|
|
|
Shopping Cart
