Is the industry-accepted maximum tolerance unreasonably low?
In a previous article, I discussed the use of the moisture dome test, ASTM 1869-98, as well as a research study by two California engineering firms in an effort to defuse the litigation attached to concrete quality by using the dome test.
That study, along with one recently published in Concrete Construction magazine, points out the variations in test results. The article in Concrete Construction reports on the results of 232 laboratory tests and 144 field tests conducted on on-grade slabs and elevated slabs. The findings of the authors, Bruce A. Suprenant and Ward R. Malisch, appear to conclude that the industry-accepted maximum tolerance of 3 pounds per 1,000 square feet in 24 hours is unreasonably low.