Interior Sandblasting / Contamination
Interior Sandblasting / Contamination
(OP)
I have an interior basement where the walls and columns have severe spall/fracture due to salt contamination/rusting of the re-bar in the walls and the WF's in the columns. The concrete covering for the WF columns are fire protection and have no structural capacity.
The walls are fillers, no loading either side (exterior face is a dry-well, or top (the floor loading is carried by a WF beam between the WF columns. The basement area is highly utilized, mechanical area for the bldg.
I need to remove the spalled/deteriorated concrete and clean the re-bar and WF's and then reface/resurface the items. Contamination from sandblasting must be confined to the immediate area and kept out of the mechanical areas. Have done rehab work outside but not inside.
My question. Can contamination barriers be used with sufficient success to prevent dusting of the basement area? Any other suggestions?
Thanks, Tincan.
The walls are fillers, no loading either side (exterior face is a dry-well, or top (the floor loading is carried by a WF beam between the WF columns. The basement area is highly utilized, mechanical area for the bldg.
I need to remove the spalled/deteriorated concrete and clean the re-bar and WF's and then reface/resurface the items. Contamination from sandblasting must be confined to the immediate area and kept out of the mechanical areas. Have done rehab work outside but not inside.
My question. Can contamination barriers be used with sufficient success to prevent dusting of the basement area? Any other suggestions?
Thanks, Tincan.






RE: Interior Sandblasting / Contamination
Here is a typical link for information:
http://www.nlbcorp.com/water_blasting_concrete_cut...
RE: Interior Sandblasting / Contamination
RE: Interior Sandblasting / Contamination
RE: Interior Sandblasting / Contamination
RE: Interior Sandblasting / Contamination
Water blasting can also use grit to assist.
Ask your local grit blasting company
StephenA
RE: Interior Sandblasting / Contamination
http://www.spongejet.com/
RE: Interior Sandblasting / Contamination
To use sandblasting, you also need to check the environmental regulations in your area. Those regulations should also have a guideline for permissible techniques to use in selective demolition or restoration. It will save you substantial time and unnecessary effort. I agree that hydroblasting is a more environment frienly demolition process. The problem are the nozzles used and the residual water generated. The nozzless need to rated to maximum pressure rate and the hydroblasting company should take care of it. About the residual water, Can the hydroblasting company collect it? Does your basement has a sump where to collect it? Does your community permits direct disposal on the sewer system?
Dry ice in my experience it did not work for concrete demolition. We use it for cleaning concrete surfaces only. Yes, it does evaporate in the air; the residual debris comes from what is removed from the material being cleaned.
The pressures that have given us excellent results removing the deteriorated concrete without damaging the sound substrate vary from 8,000~15,000 psi. We do a lot of concrete vessels restoration.
RE: Interior Sandblasting / Contamination
Tincan.