Work Item
ASTM WK96505

Revision of C1778-23 Standard Guide for Reducing the Risk of Deleterious Alkali-Aggregate Reaction in Concrete

Rationale

Recent research has found that the 2-year concrete prism test has been found to underestimate the percentage replacement or dosage rates for SCMs or lithium nitrate, respectively, for high alkali loading mixtures. This new wording will warn users from using ASTM C1293 for mitigation in high alkali content mixtures as it may not be conservative.

Details

Developed by Subcommittee: C09.50

Committee: C09

Staff Manager: Kevin Shanahan

Work Item Status

Date Initiated: 09-30-2025

Technical Contact: Thano Drimalas

Item: 000

Ballot:

Status: