Title:
Concrete Q&A: "90-Minute Rule" for Ready Mixed Concrete
Author(s):
Publication:
Concrete International
Volume:
46
Issue:
8
Appears on pages(s):
59-60
Keywords:
time, limit, discharge, project
DOI:
10.14359/51742126
Date:
8/1/2024
Abstract:
ASTM C94/C94M, “Standard Specification for Ready-Mixed Concrete,” used to include a requirement for completing discharge of concrete from a concrete truck within 90 minutes from batching. Starting with the 2021 edition of the standard, this rule was replaced with the alternative for a time limit to be established between the purchaser and the concrete producer.
Related References:
1. ASTM C94/C94M-21, “Standard Specification for Ready-Mixed Concrete,” ASTM International, West Conshohocken, PA, 2021, 15 pp.
2. ACI Committee 301, “Specifications for Concrete Construction (ACI 301-20),” American Concrete Institute, Farmington Hills, MI, 2020, 69 pp.
3. ASTM C94/C94M-20, “Standard Specification for Ready-Mixed Concrete,” ASTM International, West Conshohocken, PA, 2020, 15 pp.
4. ASTM C94-35, “Standard Specification for Ready Mixed Concrete,” ASTM International, West Conshohocken, PA, 1935, 9 pp.
5. ASTM C94/C94M-18, “Standard Specification for Ready Mixed Concrete,” ASTM International, West Conshohocken, PA, 2018, 15 pp.
6. “AIA MasterSpec, Section 03 30 00 Cast-In-Place Concrete,” The American Institute of Architects, Washington, DC, 2021.