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2013, br. 2, str. 219-230
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Statistička obrada rezultata međulaboratorijskog ispitivanja konzistencije tla - Aterbergovih granica (granica tečenja, plastičnosti i skupljanja)
Statistical processing the results of interlaboratory testing the consistency of soil - the Atterberg limits (liquid, plasticity and shrinkage limit)
Projekat: Istraživanje i praćenje promena naponsko deformacionog stanja u stenskom masivu "in-sity" oko podzemnih prostorija sa izradom modela sa posebnim osvrtom na tunel Kriveljske reke i Jame Bor (MPNTR - 33021)
Sažetak
U radu su prikazani rezultati međulaboratorijskog ispitivanja konzistencije tla - Aterbergovih granica (granica tečenja, plastičnosti i skupljanja). Ispitivanja su izvršena na reprezentativnim uzorcima tla. Rezultati su obrađeni na dva načina i to: numeričkom metodom - Cochran-ov test preciznosti i grafičkom interpretacijom - Računanje z vrednosti u skladu sa standardom SRPS ISO 5725-2 [1]. Izračunate su: varijansa ponovljivosti Sr2; međulaboratorijska varijansa SL 2 i varijansa obnovljivosti SR 2.Uzorci su metodom deljenja dostavljeni svim laboratorijama učesnicama.
Abstract
This paper presents the results of interlaboratory testing the soil consistency - the Atterberg limits (liquid, plasticity and shrinkage limit). The tests were performed on representative samples of soil. The results were analyzed in two ways: numerical method - the Cochran test of precision and graphical interpretation - calculation of z value in accordance with the Standard ISO 5725-2 [1]. The followings were calculated: variance of repeatability Sr2, interlaboratory variance SL 2 and reproducibility variance SR 2.The samples were distributed by the method of divisibility to all participating laboratories.
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Reference
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*** (2009) u: Processing the Results of Interlaboratory Testing, Seminar, October 2009, Belgrade
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*** SRPS 17025 general requirements for competence the laboratory for testing and calibration. In Serbian
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*** (1980) Standard SRPS U.B1.020:1980 Methods for determination the soil consistency: The Atterberg limits. in Serbian
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Barišić, E., Sekulić, D., Petrak, I. Evaluation the qualification of laboratories through regional interlaboratory testing the compressive strength of concrete. Zagreb: Institute of Civil Engineering, Department for Concrete and Built Structures, in Croatian
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IS0 (1997) Proficiency testing by interlaboratory comparisons - Part 1: Development and operation of proficiency testing schemes
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ISO SRPS ISO 5725-2 Accuracy (trueness and precision) of measurement methods and results-Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method
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ISO SRPS ISO 5725-1 Accuracy (trueness and precision) of measurement methods and results-Part 1: General principles and definitions
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