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:
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.