AASHTO T291

Standard Method of Test for Determining Water-Soluble Chloride Ion Content in Soil

Applicability: AASHTO T291 is a test method used to determine the water-soluble chloride ion content in soil. It’s applicable to soil samples that can be prepared to pass a No. 10 sieve (2.00 mm). This standard is particularly relevant for assessing potential corrosion of steel reinforcement in soil, especially in the context of mechanically stabilized earth (MSE) walls and other structures.

Purpose: AASHTO T291 is a standard test method used to determine the water-soluble chloride ion content in soil. This test is crucial for assessing the potential for corrosion of metal components in contact with soil, particularly in applications like retaining wall backfill or mechanically stabilized earth fills.