Blasting operations and requirements.
Rubbed concrete wall finishes.
Sacking produced a finish for cast in place concrete surfaces after fins from oils and bond breakers had been removed by filling in pits and air holes by dampening the surface and rub bing mortar all over it.
Rubbed finishes smooth rubbed no later than the day following formwork removal wet surface and rub it with an abrasive such as a carborundum brick until a uniform color and texture are produced.
A popular easy to apply and long lasting finish is called rubbing when you rub out a new concrete wall you are applying a thin coat of portland cement and literally rubbing it with a sponge float to create an attractive and durable finish.
Wet rubbing is accomplished on green concrete by a slow speed grinding wheel or disc at the same time applying water.
When finish is not indicated provide smooth form finish as specified above.
Immediately after removing the forms form ties shall be broken back a minimum of three quarters inch from the surface honeycomb voids and other surface defects grouted.
Conform to aci 301.
Cleveland concrete contractor ron simonetti says a smooth rubbed finish done with an abrasive stone should look the same as a grout cleaned sacked finish.
Apply sandblasted finish to exposed concrete surfaces where indicated.
Polished concrete wall made by us with cebos pozzolano plaster.
16 carborundum stone or equal abrasive to create a uniform surface paste.