strength or the measured is unavoidable given the inherent randomness of in-place concrete strengths and the uncertainty attributable to preparation and testing of the specimen, may …

These criteria specify the circumstances when core tests are permitted, the number of cores to be tested, the conditioning of the cores before testing, the limits on the time interval between …

Low Strength Results and Core Testing Q. Lower-than-specified compressive strength was determined from results of cylinder testing of one concrete placement on our project. How can …

Technical Questions ACI Committees, Membership, and Staff have answered common questions on a variety of concrete related topics. Low-strength cylinder test results Q. If a structure is …

While coring and load testing may be considered nondestructive, they are excluded from this report. Refer to ACI 437R for more information about strength evaluation of existing concrete …

Technical Questions ACI Committees, Membership, and Staff have answered common questions on a variety of concrete related topics. Using core strength to calculate compressive strength …

Jul 8, 2025 · ACI Certification Graphic Use Organizations and individuals are encouraged to use this ACI Certification graphic on e-mail, websites, stationery, and other materials to show …

This guide summarizes practices for obtaining cores and interpreting core compressive strength test results. Factors that affect in-place concrete strength are reviewed so sampling locations …

American Concrete Institute

isting concrete structures. Throughout this code, the term “structure” means an existing building, member, system, and, where applicable, nonbuilding structures where the construction is …