ISO 17892-4:2016
Geotechnical investigation and testing — Laboratory testing of soil — Part 4: Determination of particle size distribution
ISO 17892-4.2016 specifies a method of determining the particle size distribution of soils.
ISO 17892-4.2016 is applicable to the laboratory determination of the particle size distribution of a soil test specimen by sieving, or sedimentation, or a combination of both within the scope of geotechnical investigations.
The particle size distribution is one of the most important physical characteristics of soil. Classification of soils is mainly based on the particle size distribution. Many geotechnical and geohydrological properties of soil are related to the particle size distribution.
The particle size distribution provides a description of soil based on a subdivision in discrete classes of particle sizes. The size of each class can be determined by sieving and/or sedimentation. Coarse soils are usually tested by sieving, but fine and mixed soils are usually tested by a combination of sieving and sedimentation, depending on the composition of the soil.
The sieving method described is applicable to all non-cemented soils with particle sizes less than 125 mm. Two sedimentation methods are described: the hydrometer method and the pipette method.
NOTE ISO 17892-4.2016 fulfils the requirements of the particle size distribution testing in accordance with EN 1997-2.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Apparatus
4.1 General
4.2 Sieving method
4.3 Hydrometer method
4.4 Pipette method
4.5 Reagents
5 Test procedure
5.1 Selection of test method
5.2 Sieving method
5.2.1 General
5.2.2 Specimen preparation
5.2.3 Test execution
5.3 Hydrometer method
5.3.1 General
5.3.2 Specimen preparation
5.3.3 Test execution
5.4 Pipette method
5.4.1 General
5.4.2 Specimen preparation
5.4.3 Test execution
5.5 Combined tests
6 Test results
6.1 Sieving
6.1.1 Fraction passing each sieve
6.2 Hydrometer
6.2.1 Total dry mass
6.2.2 Fraction passing each sieve
6.2.3 True hydrometer reading
6.2.4 Effective depth
6.2.5 Equivalent particle diameter
6.2.6 Modified hydrometer reading
6.2.7 Fraction smaller than equivalent particle diameter
6.2.8 Correction for material larger than 2 mm
6.3 Pipette
6.3.1 Total dry mass
6.3.2 Fraction passing each sieve
6.3.3 Equivalent particle diameter
6.3.4 Fraction smaller than equivalent particle diameter
6.3.5 Correction for material larger than 2 mm
7 Test report
Annex A (normative) Calibration, maintenance and checks
Annex B (informative) Pre-treatment of samples
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Apparatus
4.1 General
4.2 Sieving method
4.3 Hydrometer method
4.4 Pipette method
4.5 Reagents
5 Test procedure
5.1 Selection of test method
5.2 Sieving method
5.2.1 General
5.2.2 Specimen preparation
5.2.3 Test execution
5.3 Hydrometer method
5.3.1 General
5.3.2 Specimen preparation
5.3.3 Test execution
5.4 Pipette method
5.4.1 General
5.4.2 Specimen preparation
5.4.3 Test execution
5.5 Combined tests
6 Test results
6.1 Sieving
6.1.1 Fraction passing each sieve
6.2 Hydrometer
6.2.1 Total dry mass
6.2.2 Fraction passing each sieve
6.2.3 True hydrometer reading
6.2.4 Effective depth
6.2.5 Equivalent particle diameter
6.2.6 Modified hydrometer reading
6.2.7 Fraction smaller than equivalent particle diameter
6.2.8 Correction for material larger than 2 mm
6.3 Pipette
6.3.1 Total dry mass
6.3.2 Fraction passing each sieve
6.3.3 Equivalent particle diameter
6.3.4 Fraction smaller than equivalent particle diameter
6.3.5 Correction for material larger than 2 mm
7 Test report
Annex A (normative) Calibration, maintenance and checks
Annex B (informative) Pre-treatment of samples
Bibliography