ASTM G187 is the ASTM standard for the Standard Test Method for Measurement of Soil Resistivity Using the Two-Electrode Soil Box Method. It provides a defined approach for measuring soil resistivity with a controlled two-electrode setup, helping users obtain consistent results for engineering and testing purposes. This matters because soil resistivity is a practical property used in assessing ground conditions, and a standardized method supports more reliable comparison, documentation, and technical decision-making.

Purpose of ASTM G187

The purpose of ASTM G187 is to describe a test method for measuring soil resistivity in a laboratory-style soil box arrangement using two electrodes. The standard helps create a repeatable framework for evaluating how soil conducts electrical current under controlled conditions. In practice, this supports users who need a recognized ASTM standard for measurement consistency, data comparison, and quality-focused testing. ASTM G187 is useful when a clear, standardized procedure is needed for soil resistivity measurement.

Common use cases of ASTM G187

ASTM G187 is commonly used when soil resistivity data are needed for engineering evaluation, testing programs, or specification-related work. Because the method centers on a two-electrode soil box, it is suited to controlled sample measurements rather than field conditions. It may be used in laboratory workflows where soil properties must be characterized in a consistent way, especially when comparing samples or supporting technical assessments that depend on electrical resistance behavior in soil.

Why ASTM G187 matters

This standard matters because a clear measurement method reduces ambiguity in soil resistivity testing. Using ASTM G187 can help improve consistency across test results, support procurement or compliance needs, and provide a common basis for quality control and product evaluation. For organizations that rely on soil characterization data, a recognized ASTM test method helps reduce risk from inconsistent procedures and makes technical records easier to defend and compare.

• Two-electrode soil box measurement method
• Controlled soil resistivity testing
• Repeatable laboratory-style procedure
• Supports comparison of test results
• Useful for engineering and quality workflows