ISO 17892-2:2014 地盤調査と試験—土壌の実験室試験—パート2：かさ密度の決定 | ページ 2

Foreword

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ISO 17892-2 was prepared by the European Committee for Standardization (CEN) Technical Committee CEN/TC 341, Geotechnical investigation and testing, in collaboration with Technical Committee ISO/TC 182, Geotechnics, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).

This first edition of ISO 17892-2 cancels and replaces ISO/TS 17892-2:2004, which has been technically revised. It also incorporates the Technical Corrigendum ISO/TS 17892-2:2004/Cor 1:2006.

ISO 17892 consists of the following parts, under the general title “Geotechnical investigation and testing — Laboratory testing of soil”:

• Part 1: Determination of water content
• Part 2: Determination of bulk density
• Part 3: Determination of particle density
• Part 4: Determination of particle size distribution
• Part 5: Incremental loading oedometer test
• Part 6: Fall cone test
• Part 7: Unconfined compression test on fine-grained soils
• Part 8: Unconsolidated undrained triaxial test
• Part 9: Consolidated triaxial compression tests on water-saturated soils
• Part 10: Direct shear tests
• Part 11: Determination of permeability by constant and falling head
• Part 12: Determination of Atterberg limits

Introduction

This document covers areas in the international field of geotechnical engineering never previously standardised internationally. It is intended that this document presents broad good practice throughout the world and significant differences with national documents is not anticipated. It is based on international practice (see Reference [1]).

1 Scope

This International Standard specifies three methods for the determination of the bulk density of soils, comprising:

• a) linear measurement method;
• b) immersion in fluid method;
• c) fluid displacement method.

This International Standard is applicable to the laboratory determination of the bulk density of soil within the scope of geotechnical investigations.

The linear measurement method is suitable for the determination of the bulk density of a specimen of soil of regular shape, including specimens prepared for other tests. The specimens used are either rectangular prisms or cylinders with circular cross sections.

The immersion in fluid method covers the determination of the bulk density of a specimen of natural or compacted soil by measuring its mass in air and its apparent mass when suspended in fluid. The method may be used when lumps of material of suitable size can be obtained.

The fluid displacement method covers the determination of the bulk density of a specimen of soil by measuring its mass in air and the mass of fluid displaced by immersion. The method may be used when lumps of material of suitable size can be obtained.

If the immersion in fluid method or fluid displacement method is used, and if the fluid is likely to penetrate into the specimen (eg water) the specimen should be coated before testing to prevent fluid penetration.

The bulk density of a soil is useful in the determination of the in situ overburden stress as a function of depth.

If required, the dry density of a specimen may be calculated from the bulk density and the water content, if known.

2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

Bibliography