ASTM D6913
Full Name
ASTM D6913 – Standard Test Methods for Particle-Size Distribution (Gradation) of Soils Using Sieve Analysis
Scope
ASTM D6913 outlines procedures for determining the particle size distribution of soils. This information is crucial in various construction applications, as it directly impacts the engineering properties of soil.
This standard presents two methods:
- Method A: this method utilizes a sieve series to physically separate soil particles into different size ranges. By measuring the mass retained on each sieve, the percentage of particles within each size range can be calculated. This method is suitable for soils with minimal amounts of clay or silt.
- Method B: this method combines sieving with hydrometer analysis. It involves first separating coarser particles through sieving. The finer fraction, which passes through the smallest sieve, is then subjected to hydrometer analysis to determine the distribution of silt and clay particles. This method is suitable for soils with significant amounts of fine-grained material.
Key information obtained from ASTM D6913 testing includes:
- Gradation curve: a graphical representation of the particle size distribution, enabling engineers to classify soil types and assess their suitability for different purposes.
- Coefficient of Uniformity (Cu) and Coefficient of Curvature (Cc): these parameters quantify the uniformity and gradation of the soil, influencing permeability, compaction characteristics, and overall stability.
ASTM D6913 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the ASTM D6913 standard.
Contact us today to discuss your testing needs and ensure the foundation of your project is built on solid ground.
Resources
Keywords
sieve analysis; particle size; gradation; soil; sieve; hydrometer; wash; fines; sand; gravel; Atterberg limits; plasticity index; liquid limit; particle size distribution; coefficient of uniformity