Title:
Concrete Q&A: Can Testing Laboratories Have True Companions?
Author(s):
Publication:
Concrete International
Volume:
44
Issue:
8
Appears on pages(s):
63-64
Keywords:
results, owner, producer, difference
DOI:
10.14359/51737131
Date:
8/1/2022
Abstract:
This month’s Q&A focuses on evaluation and comparison of test results provided by owner’s and concrete producer’s testing agencies. It discusses responsibilities of the owner’s testing agency specified in ACI 301-20 as well as acceptable differences in test results based on interlaboratory studies and precision statements provided in relevant ASTM standards.
Related References:
1. ACI Committee 301, “Specifications for Concrete Construction (ACI 301-20),” American Concrete Institute, Farmington Hills, MI, 2020, 69 pp.
2. ASTM C172/C172M-17, “Standard Practice for Sampling Freshly Mixed Concrete,” ASTM International, West Conshohocken, PA, 2017, 3 pp.
3. ASTM C143/C143M-20, “Standard Test Method for Slump of Hydraulic-Cement Concrete,” ASTM International, West Conshohocken, PA, 2020, 4 pp.
4. ASTM C231/C231M-17a, “Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method,” ASTM International, West Conshohocken, PA, 2017, 10 pp.
5. ASTM C31/C31M-21a, “Standard Practice for Making and Curing Concrete Test Specimens in the Field,” ASTM International, West Conshohocken, PA, 2021, 7 pp.
6. ASTM C94/C94M-21b, “Standard Specification for Ready-Mixed Concrete,” ASTM International, West Conshohocken, PA, 2021, 15 pp.
7. “TIP 16 - Evaluating Strength Test Results,” National Ready Mixed Concrete Association, Alexandria, VA, 8 pp.