Grinding Concrete Ends
Grinding Concrete Ends
(OP)
So, we are using concrete grinders but we also have capping compound. The thing is one of the six cylinder grinders broke down and I'm left with just one and on after winter we do break 80-120 cylinders a day.
My question is what is the ASTM standard for grinding cylinders prior to breaking. I want to manage my time well and grind ahead if I'm not that busy. Will there be issue with ASTM standards?
My question is what is the ASTM standard for grinding cylinders prior to breaking. I want to manage my time well and grind ahead if I'm not that busy. Will there be issue with ASTM standards?





RE: Grinding Concrete Ends
First, if you are testing concrete specimens, you should have copies of the ASTM standards that would apply to that testing. There is currently no approved ASTM standard that allows grinding only; however, you could interpret the standards to perhaps include preparatory grinding for capping methods or if you meet the planeness tolerance, then no capping. Get copies of the ASTM standards and be familiar with them. Your company is open to liability and criticism for not doing so.
I would suggest that if you are testing a lot of cylinders, and it appears that you are, you should consider using unbonded polymer lined caps. This is an acceptable ASTM method and will save you considerable time. You will need to develop a protocol for inspecting the caps and replacing the polymer lining on a regular basis because of wear. I would also suggest that you do companion testing with sulfur caps for a while to see the differences in results, if any.
RE: Grinding Concrete Ends
I just cant seem to find anything about grinding. The only thing I can find related to this is the capping section which tells about the planeness. Other than that, nothing.
I have a heavy day 9days from now and want to grind ahead but I dont want to do that unless I could find something from ASTM saying I'm allowed to do so. Right now, we are grinding and breaking on the same dates with the break dates.
Thanks Ron.
RE: Grinding Concrete Ends
RE: Grinding Concrete Ends
I guess I have to stick to grinding and breaking at the same day.
RE: Grinding Concrete Ends
RE: Grinding Concrete Ends
RE: Grinding Concrete Ends
ICC Master Special Inspector, Structural Masonry, Reinforced Concrete, Soils, Structural Bolted Joints, Structural Welding, AWS CWI D1.1