JIS A 1158:2020 PDF Download

JIS A 1158:2020 standard outlines the procedures for reducing the size of fine and coarse aggregates to a specified sample size for testing purposes. It specifically applies to coarse aggregates with maximum sizes of up to 40 mm, while aggregates larger than 40 mm should be reduced using alternative methods not defined in this standard.

The standard provides guidelines and instructions for practitioners to follow when conducting aggregate size reduction. It ensures that the reduced samples accurately represent the original aggregates and facilitate reliable testing. Annex A of the standard includes a comparison table that highlights any significant revisions made from the previous edition, allowing users to easily identify and understand the modifications.