ISO 11508 pdf download

ISO 11508 pdf download.Soil quality — Determination of particle density 1 Scope This International Standard describes two methods for the determination of particle density of soils calculated from the mass and the volume of soil particles. The first method (4.1 ) is applicable to fine soil (< 2 mm diameter) and the second method (4.2) is applicable to both porous and nonporous gravel and stones (> 2 mm diameter). The particle density may be used for the calculation of the proportion of solids and of the porosity of soil layers in combination with the procedure given in ISO 1 1 272. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 565:1 990, Test sieves — Metal wire cloth, perforated metal plate and electroformed sheet — Nominal sizes of openings. ISO 1 0381 -1 :— 1 ) , Soil quality — Sampling — Part 1 : Guidance on the design of sampling programmes. ISO 1 1 272:— 1 ) , Soil quality — Determination of dry bulk density. ISO 1 1 461 :— 1 ) , Soil quality — Determination of soil water content on a volume basis — Gravimetric method. 3 Definition For the purposes of this International Standard, the following definition applies. 3.1 particle density: Ratio of the total mass of oven-dry solid particles (minerals, organic matter) to the volume of these particles. NOTE 1 The volume comprises internal pores of soil particles but pore spaces between particles are excluded. NOTE 2 The preferred SI unit of measurement is kilograms per cubic metre (kg • m –3 ) but grams per cubic centimetre (g • cm –3 ) 4 Procedure 4.1 Fine soil (< 2 mm diameter) 4.1.1 Principle The mass of a portion of soil is determined by weighing. The volume of the soil is calculated from the mass and the density of water displaced by the sample in a pyknometer. 4.1.2 Apparatus 4.1.2.1 Pyknometer (20 cm 3 to 50 cm 3 ): a glass flask fitted with a ground-glass stopper which...