EN 13041:2011

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Bodenverbesserungsmittel und Kultursubstrate - Bestimmung der physikalischen Eigenschaften - Rohdichte (trocken), Luftkapazität, Wasserkapazität, Schrumpfungswert und GesamtporenvolumenAmendements du sol et supports de culture - Détermination des propriétés physiques - Masse volumique apparente sèche, volume d'air, volume d'eau, valeur de rétraction et porosité totaleSoil improvers and growing media - Determination of physical properties - Dry bulk density, air volume, water volume, shrinkage value and total pore space65.080GnojilaFertilizersICS:Ta slovenski standard je istoveten z:EN 13041:2011SIST EN 13041:2012en,fr,de01-marec-2012SIST EN 13041:2012SLOVENSKI
STANDARDSIST EN 13041:2001/A1:2006SIST EN 13041:20011DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 13041
November 2011 ICS 65.080 Supersedes EN 13041:1999English Version
Soil improvers and growing media - Determination of physical properties - Dry bulk density, air volume, water volume, shrinkage value and total pore space
Amendements du sol et supports de culture - Détermination des propriétés physiques - Masse volumique apparente sèche, volume d'air, volume d'eau, valeur de rétraction et porosité totale
Bodenverbesserungsmittel und Kultursubstrate - Bestimmung der physikalischen Eigenschaften -Rohdichte (trocken), Luftkapazität, Wasserkapazität, Schrumpfungswert und Gesamtporenvolumen This European Standard was approved by CEN on 17 September 2011.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13041:2011: ESIST EN 13041:2012

Construction of sand suction table . 12Annex B (informative)
Results of interlaboratory trial to determine the physical characteristics . 16Bibliography . 26 SIST EN 13041:2012

As each ring is individually made it is necessary to determine the volume (V1), record the mass (m1) and identify each lower sample ring. The volume shall be determined by measuring the mean height (at least quadruplicate measurements) (h1) and mean diameter (d1) of the sample rings with a calliper gauge (At least triplicate measurements; top, middle and bottom). 5.1.2.2 Removable gauze-retaining ring or collar 20 mm high and 7,5 mm to 8,5 mm larger than the outer diameter of the sample ring. 5.1.2.3 Non-biodegradable synthetic gauze with a mesh size of about 0,1 mm. 5.1.3 Upper ring 5.1.3.1 Upper ring having the same internal diameter as the ring prepared in (see 5.1.2.1) and height
(53 ± 1) mm. 5.1.3.2 Collar - fixed on the ring permitting the upper cylinder to be secured to the lower cylinder for the duration of the test.
5.2 Plastic tube, of approximately 14 cm diameter and 14 cm high to give a volume of about 2 l. Tightly stretch and secure the gauze (see 5.1.2.3) to one end of the tube by means of an elastic band. 5.3 Water bath, capable of holding at least 4 plastic tubes (see 5.2) standing on a coarse mesh and capable of being filled with water to the top of the plastic tubes. 5.4 Sand suction table (see Figure A.3) Prepare the sand suction table for example in accordance with Annex A, using the fine sand to obtain the required suction. The pressure head in the plastic tubes (–50 cm water = –5 kPa) is measured from the SIST EN 13041:2012

–100 cm water, equivalent to –1 kPa, –5 kPa and –10 kPa, respectively) is measured from the middle of the lower ring (see Figure A.3). The setting of the pressure head can be checked with a tensiometer or pressure transducer. 5.5 Ventilated drying oven set at (103 ± 2) °C. 5.6 Analytical balance with a scale interval of 0,1 g. 5.7 Shallow vessel, spoon or scoop approximately 50 ml capacity. 6 Preparation Prepare the laboratory sample in accordance with 8.4 of EN 13040:2007. 7 Procedure 7.1 Moistening, saturating and equilibration at –50 cm water (–5 kPa) pressure head 7.1.1 Fill at least 2 tubes (see 5.2) with the test portion taking care to prevent artificial air voids. Cover each tube with synthetic gauze (see 5.1.2.3) secured with an elastic band. Place the tube on the grid in a dry water bath (see 5.3).
7.1.2 Slowly, with constant flow, fill the bath with water until the level reaches to within 1 cm below the top of the tube. Filling should take approximately 30 min. 7.1.3 If a tube shows signs of floating, place a weighted disc on the top of the tube allowing air to evacuate and at the same time ensuring that compaction of the sample does not take place, (see Figure A.4). 7.1.4 Allow to stand maintaining a constant water level until the sample is thoroughly wetted (up to 36 h). 7.1.5 Remove the tubes and without delay, transfer the tubes to the sand suction table. The bottom of the tube should be fully in contact with the sand. Apply a –50 cm water (–5 kPa) pressure head, measured from the bottom of the tube, for 48 h. 7.2 Filling tubes 7.2.1 Secure the gauze (see 5.1.2.3) with the collar (see 5.1.2.2) to the base of the lower sample ring (see 5.1.2). Attach and secure the upper sample ring (see 5.1.3) to the lower sample ring. 7.2.2 Empty the tubes containing the equilibrated (–50 cm water, –5 kPa) wet sample from 7.1.5 onto a clean surface and gently mix taking care not to cause any physical damage to the sample. 7.2.3 Transfer using the shallow vessel (see 5.7) approximately 50 ml portions of the mixed sample to the prepared sample rings taking care to avoid compaction or artificial air voids and filling the cylinder and removable ring completely. 7.2.4 Fill at least 4 units with the sample. Place the unit on the grid in a dry water bath. Slowly, with constant flow, fill the bath (see 5.3) with water until the level reaches to within 1 cm below the top of the tube. Filling should take approximately 30 min. 7.2.5 Maintain a constant water level for 24 h (see Figure A.5). NOTE Two different baths may be used, one for -10 cm water (–1 kPa) and one for –50 cm water (–5 kPa). SIST EN 13041:2012

Apply the suction until equilibrium is reached. A minimum of 48 h and up to 72 h is required. 7.4 Separation of rings 7.4.1 Remove the double ring sample cylinders from the sand box and place on a flat solid surface. Carefully remove the upper ring in a vertical movement. Use a knife or straight edge to strike off the material level with the top of the sample ring without causing compaction. The levelling of fibrous materials can best be done by cutting off excess matter with a pair of scissors exercising considerable care to avoid other disturbances. 7.4.2 Remove any materials adhering to the outside of the sample ring and record the mass (m2) taking care not to turn the ring. 7.5 Optional suction –50 cm and –100 cm water (–5 kPa and – 10 kPa) pressure head
NOTE After –10 cm water (–1 kPa) pressure head it is possible also to determine the air and water volume at –50 cm and –100 cm water (–5 kPa and –10 kPa) pressure head. The following procedure (see 7.5) can be skipped only if values for water and air volume at –10 cm water (–1 kPa) are necessary. 7.5.1 Carefully place the ring to the sand bath (see 5.4) making sure there is contact between the sand and the lower part of the ring. Cover the sand box and apply a –50 cm water (–5 kPa) pressure head, measured from the middle of the ring. 7.5.2 It is important to regularly check that no air bubbles are present in the suction level regulator tubes. 7.5.3 Apply the suction until equilibrium is reached. A minimum of 48 h and up to 72 h is required. 7.5.4 Record the mass (m3). 7.5.5 Carefully place the ring to the sand bath (see 5.4) making sure there is contact between the sand and the lower part of the ring. Cover the sand box and apply a –100 cm water (–10 kPa) pressure head, measured from the middle of the ring. 7.5.6 It is important to regularly check that no air bubbles are present in the suction level regulator tubes. 7.5.7 Apply the suction until equilibrium is reached. A minimum of 48 h and up to 72 h is required. 7.5.8 Record the mass (m4). 7.6 Drying 7.6.1 Place in the drying oven (see 5.5) without altering the structure and dry at (103 ± 2) °C to constant mass (m5). SIST EN 13041:2012
...