Particle Density Testing: Specific Gravity Data You Can Build On
Particle Density—often referred to as Specific Gravity—measures a material’s true density by removing the influence of air and water. This differs from bulk (or dry) density, which includes the void spaces within a soil or aggregate. Because of this, particle and bulk density values can be very different (for example, a soil may have a bulk density around 1.90 Mg/m³ while its particle density is closer to 2.70 Mg/m³).
Particle density can be determined using established laboratory methods such as a pycnometer, density bottle, or gas jarapproach, depending on the material type and the level of precision required.
Why particle density matters
Accurate particle density results are used in key engineering calculations, including:
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voids ratio and degree of saturation
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compaction and earthworks assessment
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water absorption and material performance checks
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supporting broader soil/aggregate characterisation for design decisions
Why choose The Testing Lab PLC?
At The Testing Lab PLC, we provide dependable particle density testing with clear, practical reporting that fits seamlessly into your geotechnical workflow. Our team helps ensure you get the right method, the right data, and results you can confidently use in design and compliance.
Need particle density testing? Contact The Testing Lab PLC to discuss your samples and turnaround.
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