Published on Highways Today in July 2019.
The maturity method is an ASTM-standardized, non-destructive test method for estimating concrete strength that provides real-time results. Typically, cylinders and beams are required to be cast and broken for quality control and 28-day acceptance.
It is common practice to simply cast and break additional samples, sometimes referred to as companion samples, for estimating early-age strength of in-place concrete for purposes such as early form removal, post-tensioning of elevated slabs, and fast-track pavement construction and repair. However, the strength gain of these cylinders may not reflect the strength gain of the in-place concrete.
