Work Item
ASTM WK81875

Revision of C1293-20a Standard Test Method for Determination of Length Change of Concrete Due to Alkali-Silica Reaction


In a recent CCRL lab inspection the inspector commented that our effective gage length for ASTM C1293 was not in compliance. C1293 refers to C490 for apparatus but since C1293 is metric they go by metric limits in C490 which says the gage length should be 247.5-252.5 mm which we fail. For inch-lb units C490 says 9.9-10.1 in. and we meet that. We are using the same molds as C157 which is a dual-use unit. The inspector remarked that this issue is faced by many labs. If C1293 is changed to allow for dual-use units this issue will not arise.


Developed by Subcommittee: C09.50

Committee: C09

Staff Manager: W Scott Orthey

Work Item Status

Date Initiated: 05-12-2022

Technical Contact: Karthik Obla

Item: 001

Ballot: C09.50 (22-02)

Status: Negative Votes Need Resolution