ASTM D4643
Standard Test Method for Determination of Water Content of Soil and Rock by Microwave Oven Heating
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About This Item
ASTM D4643 is the standard for determining the water content of soil and rock by microwave oven heating. It provides a practical test method for measuring moisture in geotechnical materials when a faster determination is needed for laboratory or field-related work. By focusing on water content, this ASTM standard supports more consistent test results and helps users make timely decisions in engineering, construction, and quality control settings.
Purpose of ASTM D4643
The purpose of ASTM D4643 is to define a recognized procedure for measuring water content in soil and rock using microwave oven heating. This method is intended to support reliable moisture determination where a conventional oven-drying approach may take longer. As a technical document, it helps standardize how results are obtained, improving comparability between tests and reducing uncertainty in moisture-related evaluations for geotechnical materials.
Common use cases of ASTM D4643
ASTM D4643 is commonly used when soil or rock samples need a relatively quick water content result for engineering or laboratory workflows. It may be applied during sample checking, material evaluation, or moisture control activities where timely information is important. The standard is especially useful in settings that handle geotechnical specimens and need a repeatable method for determining moisture content with microwave oven heating equipment.
Why ASTM D4643 matters
ASTM D4643 matters because water content can strongly affect the interpretation and handling of soil and rock materials. A standardized test method helps promote consistency across testing programs, supports procurement and compliance needs, and can reduce risk when decisions depend on moisture results. For laboratories and project teams, using ASTM D4643 helps align testing practices with a recognized ASTM standard and improves confidence in reported values.
- Water content determination for soil and rock
- Microwave oven heating method
- Laboratory and field-support testing
- Consistent geotechnical moisture results
- Quality control and compliance reference
- Publication Date: 2017-02-28
- Publisher: ASTM
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