---
title: "ASTM C142"
url: "https://mat-cs.com/astm-c142/"
description: "This test method covers the approximate determination of clay lumps and friable particles in aggregates."
---

ASTM Standard

# ASTM C142

Standard Test Method for Clay Lumps and Friable Particles in Aggregates

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## Significance and Use

4.1 This test method is of primary significance in determining the acceptability of aggregate with respect to the requirements of Specification C33/C33M.

## Scope

1.1 This test method covers the approximate determination of clay lumps and friable particles in aggregates.

1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

NOTE 1: Sieve sizes openings are identified by their Specification E11 designation with their alternative Specification E11 designation given in parentheses for information only.