Standard Test Methods for Laboratory Determination of Density and Unit Weight of Soil Specimens

Importancia y uso:

5.1 Density is a key element in the phase relations, phase relationships, or mass-volume relationships of soil and rock (Appendix X1). When particle density, that is, specific gravity (Test Methods D854) is also known, dry density can be used to calculate porosity and void ratio (see Appendix X1). Dry density measurements are also useful for determining degree of soil compaction. Since water content is variable, total/moist soil density provides little useful information except to estimate the weight of soil per unit volume, for example, grams per cubic centimeter, at the time of sampling. Since soil volume shrinks with drying of swelling soils, total density will vary with water content. Hence, the water content of the soil should be determined at the time of sampling.

5.2 Densities and unit weights of remolded/reconstituted specimens are commonly used to evaluate the degree of compaction of earthen fills, embankments, and the like. Dry density values are used to calculate dry unit weight values to create a compaction curve (Test Methods D698 and D1557).

Note 2: 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 facilities used. Agencies that meet the criteria of Practice D3740 are generally considered capable of competent and objective testing/sampling/inspection/etc. Users of this standard are cautioned that compliance with Practice D3740 does not in itself assure reliable results. Reliable results depend on several factors; Practice D3740 provides a means of evaluating some of these factors.

Subcomité:

D18.03

Referida por:

D5195-21, D5220_D5220M-21, D8295-19, D7181-20, D2216-19, D2166_D2166M-24, E3282-22, E3268-21, D2216-19, E3163-24, D2166_D2166M-24

Volúmen:

04.09

Número ICS:

13.080.20 (Physical properties of soil)

Palabras clave:

density; intact; porosity; reconstituted; remolded; saturation; specimen; unit weight; void ratio;