Standard Practices for Preserving and Transporting Rock Core Samples

Importancia y uso:

4.1 The geologic characteristics and the intended use of the rock core samples determine the extent and type of preservation and transportation required. If engineering properties are to be determined for the core, it must be handled and preserved in such a way that the measured properties are not significantly influenced by mechanical damage, changes in chemistry, and environmental conditions of moisture and temperature, from the time that the core is recovered from the drill core barrel and until testing is performed. Drill core is also the sample record for the subsurface geology at the borehole location, and as such must be preserved for some period of time, in some cases indefinitely, for future geologic study or core showings for design or the bidding process.

4.2 This practice presents a selection of curatorial requirements and chain of custody procedures applicable to most projects. The requirements are given for a variety of rock types and core sizes and project types ranging from small to large and from noncritical to critical. Project specific objectives, site conditions, and schedules may require adoption of more conservative handling and curatorial procedures. Guidance is given for the selection of those specific requirements which should be followed for a given project.

Note 1: The quality of the result produced by this standard is dependent on the competence of the personnel performing it and the suitability of the equipment and facility used. Agencies that meet the criteria of Practice D3740 are generally considered capable of competent and objective testing/sampling/inspection. Reliable results depend on many factors; Practice D3740 provides a means of evaluating some, but not all, of those factors.

Subcomité:

D18.12

Referida por:

D4395-17, D2936-20, D5434-25, D4394-17, D0420-18, D6169_D6169M-21, D6169_D6169M-21, D0420-18, D2216-19, D4543-19, D6232-21, D4643-17, D7625-22, D6032_D6032M-17, D2216-19, D5084-24, D5084-24, D4543-19

Volúmen:

04.08

Palabras clave:

chain of custody; core boxes; curatorial; post-test disposition; sampling; transportation ;