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 …

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 …

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 …

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

American Concrete Institute

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

A. According to section 19.2.1.3 of ACI 318-19 the specified compressive strength shall be based on the 28-day test results unless otherwise specified in t

This guide presents information on the design of slabs-on-ground, primarily industrial floors. It addresses the planning, design, and detailing of slabs. Background information on design theories is followed …