In buildings under construction, concrete core strengths may be necessary when tests of concrete cylinders don't meet ACI 318 criteria.
How to Obtain Concrete Cores and Sawed Beam for Strength Test, ASTM C 42
Frontiers Structural Design and Analysis for a Timber-Concrete Hybrid Building
Concrete Basement Wall Assessment and Repair - Carrasquillo Associates
Hardened Concrete Core Test for Compressive Strength
How to Get the Best Results from Concrete Core Testing
Video
Influence of the number of cores on concrete strength assessment by nondestructive tests in old existing structures
PDF) Acceptance of concrete compressive strength,concrete structures
In-Situ Concrete Compressive Strength Assessment - Cores
Testing of Concrete Cores for Strength - Sampling and Procedure
Monitoring of in-place strength in concrete structures using maturity method – An overview - ScienceDirect
Rachel J. Detwiler, PhD, PE on LinkedIn: How to evaluate concrete core strengths - Beton Consulting Engineers
Frontiers A Review of the Use of UHPFRC in Bridge Rehabilitation and New Construction in Switzerland