ASTM 151H Hydrometer with Certificate of Conformity

ASTM 151H Hydrometer with Certificate of Conformity

Hydrometer Analysis for ASTM Specific Gravity Hydrometers

Hydrometer analysis is a important method for determining the particle size distribution of fine grained soils. This method uses a hydrometer to measure the density of a suspension of a suspension of a suspension of a suspension of particles in a liquid. The ASTM specific gravity hydrometers are used for this purpose as they are made to meet the standards of the American Society for Testing and Materials (ASTM). These hydrometers are designed to measure the specific gravity of a liquid which is necessary for particle size analysis. By using a hydrometer one can measure the amount of particles in suspension at a given time and position and calculate the distribution.

ASTM Hydrometer Soils: 151H, Range 0.995 to 1.038 (SG)

The ASTM Soils Hydrometer 151H,Range0.995 to 1.038 (SG) has one piece stem and bulb that does not vary in diameter. The hydrometer is made of durable glass to ensure accuracy and reliability in measuring liquid density. One piece ballast is attached to the bottom of the body. Guaranteed calibration eliminates errors due to variable dilution. Some models come with a certificate of conformity or a NIST traceable certificate of calibration to validate the accuracy and reliability of the ASTM hydrometers used for testing distribution in soils.

Total length: 11” (280mm).

Meets ASTM Test Methods: AASHTO T88ASTM, ASTM C 775, ASTM D 422, and for flash point tester equipment asphalt flash point testers

These hydrometers meet the specifications of the American Society for Testing and Materials (ASTM) so they are carefully calibrated and built to withstand harsh ASTM testing environments.

What is ASTM Hydrometer? ASTM Hydrometer analysis is a laboratory test used to determine the particle size distribution gradation of fine grained soils, such as clay and silt. This test is based on the principle of sedimentation, where the rate at which soil particles settle out of suspension in a liquid is measured. By measuring the rate of sedimentation, the test provides a complete particle size distribution for soils finer than the No. 200 (75µm) sieve. Hydrometer is a key tool in geotechnical labs as it helps evaluate the engineering behavior of soils, to get accurate and reliable data for various applications.

ASTM Test Method

The method for analysis involves mixing a soil sample with water and a dispersing agent, such as sodium hexametaphosphate, to prevent clay particles from flocculating. This mixture is then poured into a sedimentation cylinder and a hydrometer is used to measure the density of the suspension at intervals. The hydrometer readings are used to calculate the particle size distribution of the soil. This is based on Stokes’ law which relates the settling velocity of a particle to its size and density, to get a detailed analysis of the soil.

ASTM Hydrometer 151H for Soils

ASTM D7928 is a standard test for analysis of soils. This test covers various parameters such as sample preparation, hydrometer type and hydrometer offset. The ASTM Hydrometer 151H is designed for this test, to measure the density of the suspension with high accuracy. The combination of D7928 and ASTM Hydrometer 151H is a reliable and precise method to analyze the distribution of fine grained soils, that’s why it is the preferred choice in geotechnical testing.

ASTM Particle Size Analysis for Specific Gravity

Particle size analysis is a key aspect of soil characterization, it affects the engineering behavior of soils. Hydrometer method is one of the several techniques used to determine the size distribution of soils along with sieve analysis and other sedimentation methods. Hydrometer method is particularly useful for fine grained soils, can measure down to 0.001 mm. The results of particle size analysis is used to classify soils, assess their engineering properties and design geotechnical structures, to ensure the stability and safety of the project.

Applications and Limitations for Specific Gravity Using ASTM Specific Gravity Hydrometers

Hydrometer analysis has many applications in geotechnical engineering such as soil classification, soil stabilization and foundation design. However the standard test method has some limitations. It is not suitable for soils with fibrous peat, less than 5% fine grained material or extraneous matter. Also the hydrometer test may not give consistent results for grained soils that flocculate during sedimentation or do not disperse readily. So it is important to evaluate the suitability of analysis for the specific soil being tested and consider these limitations when interpreting the results.

ASTM Hydrometers for Specific Gravity

The ASTM Hydrometer 151H is a precision instrument to measure the density of soil within a range of 0.995 to 1.038 specific gravity (SG). This hydrometer has a seamless, symmetrical stem and bulb with the same diameter throughout, to give consistent results every time. The one piece ballast at the bottom of the body helps to stabilize the hydrometer during testing, to reduce the errors caused by dilution fluctuations.

Buy the ASTM Soils Hydrometer 151H for precise and accurate soil density measurement in your lab or field testing. You can also find the ASTM 152H Soil Hydrometer with Certificate of Conformity for a different range measurement. Both options offer guaranteed calibration for consistent and reliable results for geotechnical, construction and environmental professionals.

Conclusion and Limitations

Using ASTM specific gravity hydrometers gives accurate and reliable results, they are essential in geotechnical engineering. But we must be aware of the limitations of the method such as not with fibrous peat or less than 5% fine grained material. By understanding the limitations and following best practices, engineers can get accurate and reliable results and the stability and safety of their projects.