Bug-holes
Bug-holes
(OP)
1. Does anyone know of a form release agent that has been shown to sigificantly reduce bugholes at formed surfaces?
2. Does self-consolidating concrete generally give a somewhat sandy surface finish? I have been told by a forming contractor that if I do a round column with plastic-lined sonotube type form or steel form, it will not give the normal "shiny" type finish that is obtained with normal concrete (he says though that he has used a specially designed self consolidation concrete that did address this).
2. Does self-consolidating concrete generally give a somewhat sandy surface finish? I have been told by a forming contractor that if I do a round column with plastic-lined sonotube type form or steel form, it will not give the normal "shiny" type finish that is obtained with normal concrete (he says though that he has used a specially designed self consolidation concrete that did address this).






RE: Bug-holes
1. No. It has more to do with the development of laitance at the formed surface, a function of the concrete mix, not the form release agent.
2. Self-consolidating concrete has a higher sand ratio, so stands to reason that you might get a more sandy texture; however, against formwork, there should be no real texture other than the smoothness (assuming smooth formwork) of the concrete and a reflection of the forming surface. Excessive laitance (wet mix, overvibration) will cause a shiny surface, particularly with plastic lined forms.
RE: Bug-holes
In any event, is there anything specific that we can specify about the concrete itself, or the placement method, in vertical elements (columns and walls), to reduce bug-holing?
RE: Bug-holes
RE: Bug-holes
RE: Bug-holes