Chapter 5 summarizes coring tech-niques that should result in high-quality, undamaged, repre-sentative test specimens. Chapter 6 describes procedures for testing cores and detecting outliers by …

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 coring and …

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 we determine if …

Low-strength cylinder test results Q. If a structure is being built in accordance with the requirements of ACI 318-19, what must be done when a low-strength test occurs? A. Section 26.12.6.1 of ACI 318-19 …

What is curing? Q. What is curing? A. Curing is action taken to maintain moisture and temperature conditions in a freshly placed cementitious mixture to allow hydraulic cement hydration and, if …

This guide is a companion document to ACI 506.2, “Specification for Shotcrete,” and provides information on materials and properties of both dry-mix and wet-mix

This guide provides information on materials and properties of both dry-mix and wet-mix shotcrete. Most facets of the shotcrete process are covered, including application procedures, equipment …

American Concrete Institute

Expect Compressive Strength Test Results Less Than Specified Strength on Every Project!

A. According to ACI PRC-214.4R-21, “Obtaining Cores and Interpreting Core Compressive Strength Results” the in-place strength of the concrete at the