AASHTO T265
Full Name
AASHTO T265 – Standard Method of Test for Laboratory Determination of Moisture Content of Soils
Scope
AASHTO T265 is a standard test method used to determine the moisture content of soil samples. Moisture content is the ratio of the mass of water in a soil sample to the mass of the dry soil solids, expressed as a percentage. This test is essential for geotechnical engineering and construction projects as it provides crucial information about the soil’s properties, behavior, and suitability for various applications.
Key aspects of AASHTO T265:
- Purpose: the primary objective of this test is to quantify the amount of water present in a soil sample. The moisture content affects the soil’s weight, volume, shear strength, compressibility, and other engineering properties.
- Principle: the test involves drying a known mass of the soil sample in an oven at a specified temperature (usually 110 ± 5 °C or 230 ± 9 °F) until a constant mass is achieved. The difference between the initial wet mass and the final dry mass represents the mass of water evaporated, which is then used to calculate the moisture content.
- Procedure: AASHTO T265 outlines a detailed procedure for preparing the soil sample, weighing it in a suitable container, drying it in the oven, and reweighing it after drying. The moisture content is then calculated using a simple formula.
- Variations: the standard provides options for different drying methods, such as conventional oven drying, microwave oven drying, and calcium carbide gas pressure meter methods. The choice of method depends on the type of soil, desired accuracy, and available equipment.
Significance of AASHTO T265:
- Geotechnical engineering: moisture content is a fundamental soil property used in various geotechnical calculations, such as determining the dry density, void ratio, and degree of saturation. This information is essential for the design of earthworks, foundations, and other geotechnical structures.
- Construction: moisture content affects the compaction and stability of soil. By monitoring the moisture content during construction, contractors can ensure that the soil is compacted to the desired density and achieve the required engineering properties.
- Quality control: AASHTO T265 provides a standardized method for determining moisture content, ensuring consistency and accuracy in test results across different laboratories and projects.
AASHTO T265 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the AASHTO T265 standard.
Our laboratory offers comprehensive soil testing services, including the determination of moisture content according to AASHTO T265. Our experienced technicians utilize calibrated equipment and adhere to strict quality control procedures to provide accurate and reliable results for your geotechnical projects.
Contact us for more information.
Resources
Keywords
moisture content; soil; drying; oven drying; mass; sample; container; balance; temperature