Sulfur capping compound
Sulfur capping compound
(OP)
ASTM requires a new test be run for labs testing high-strength concrete in accordance with C617 that shows that 15 cylinders capped with sulfur exhibit strength within 2% of strength of 15 ground cylinders. In lieu of running these tests, the lab may choose to use the manufacturer's test data. However, I have not found a mfg yet that has run this test. Nor have any labs in my area. And my initial test came up 5% short of the ground cylinders.
Now, I am aware that capping with sulfur 7 days prior to testing should increase the strength. But other than that, does anyone have any guidance or knowledge of this testing being run?
Now, I am aware that capping with sulfur 7 days prior to testing should increase the strength. But other than that, does anyone have any guidance or knowledge of this testing being run?





RE: Sulfur capping compound
could you expand. I'm 1-yr out of the testing business. we would test the sulfer cmpd after casting it in steel mortar cubes. i think if it exceeded 8ksi in the 2" cube shape it was good. Is that no longer the case. 2% seems too tight. Were you getting 2% variance b/n just the cylinders that were ground?
-ham
RE: Sulfur capping compound
RE: Sulfur capping compound
I'm glad i got out. it sounds like there will be a lot of cooking going down in the CCRL QC books this year. :)
good luck,