Consideration concerning interlaboratory test for cement in the last 20 years

Since 1988, over 40 laboratories representing research institutes, cement plants, pre-cast units, hydro plant construction companies, industrial construction companies, building companies, etc. from nine countries—Romania, Republic of Moldova, Croatia, Serbia, Macedonia, Bulgaria, Hungary, Ukraine a...

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Bibliographic Details
Published in:Accreditation and quality assurance 2009-10, Vol.14 (10), p.541-546
Main Authors: Guslicov, Graziela Virginia, Coarna, Mariana, Pop, Alice, Vlad, Cristina, Vlad, Nicoleta
Format: Article
Language:English
Subjects:
Analytical Chemistry
Biochemistry
Cement
Chemistry
Chemistry and Materials Science
Coefficient of variation
Commercial Law
Construction companies
Ecotoxicology
Exact sciences and technology
Food Science
Laboratories
Laboratory tests
Marketing
Mechanical tests
Physical tests
Plant construction
Practitioner's Report
Reproducibility
Research facilities
Standard deviation
Test procedures
Trends
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Summary:Since 1988, over 40 laboratories representing research institutes, cement plants, pre-cast units, hydro plant construction companies, industrial construction companies, building companies, etc. from nine countries—Romania, Republic of Moldova, Croatia, Serbia, Macedonia, Bulgaria, Hungary, Ukraine and Lebanon—take part every year in an interlaboratory test organized by our laboratory. The subject of the interlaboratory test for cement was 37 laboratory tests: 12 chemical determinations, 7 physical tests and 9 mechanical tests carried out with 2 types of sand, from CEPROCIM and from each participant laboratory. The paper presents the evolution of two statistical parameters (standard deviation of reproducibility and/or coefficient of variation) for a period of 20 years and for 11 laboratory tests. The results strongly prove that interlaboratory test is one of the most efficient tools to establish a common language for all the participant laboratories performing cement testing procedures.
ISSN:0949-1775
1432-0517
DOI:10.1007/s00769-009-0558-z