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Why test the 28 day grout when 7day passed?
- Thread starter njcadz
- Start date
DarthSoilsGuy
Geotechnical
unless the testing company is offering a rebate, break'em.
28-days are considered the legitimate break and the 7-day is considered a diagnostic. Concrete breaks above the specified strength on the 7-day break almost a third of the time in my experience (and usually more so for grout), but the 28-day still gets broken and reported. Besides, if you buy 3000 you should get 3000.
i have heard tales of unstable concrete that gains strength and loses it because of a bad secondary reaction, but whether that can happen b/n 7 and 28-days i don't know.
28-days are considered the legitimate break and the 7-day is considered a diagnostic. Concrete breaks above the specified strength on the 7-day break almost a third of the time in my experience (and usually more so for grout), but the 28-day still gets broken and reported. Besides, if you buy 3000 you should get 3000.
i have heard tales of unstable concrete that gains strength and loses it because of a bad secondary reaction, but whether that can happen b/n 7 and 28-days i don't know.
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